A strong choice for a roll cage is tubing whose material, outside diameter, and wall thickness match your build specifications; these options suit fabricators comparing DOM, mild steel, and 4130 chromoly. The selection includes 1-5/8-inch and 1-3/4-inch tubes, wall thicknesses from .058 to .120 inch, and pre-cut lengths from 3 to 7.5 feet. Speedway Motors’ 1-5/8-inch DOM tube with a .120-inch wall is the most directly specified pick for roll-cage and chassis work.
Several alternatives use different materials or dimensions, so they are not automatic substitutes. Check the rules and design requirements for your vehicle before choosing tubing: the product listings do not establish that any option meets a particular sanctioning body’s specifications or is suitable for every cage location.
Speedway Motors 1-5/8-Inch DOM is the leading choice in this selection because it is explicitly described for roll cages and chassis fabrication, and has a 1.625-inch outside diameter with a .120-inch wall. Its 7-foot length is a practical pre-cut option among the listed products. Confirm that those dimensions and DOM material meet your vehicle’s design and competition requirements before buying; the listing alone does not establish compliance for a specific application.
Our Top Picks
Best OverallSpeedway Motors 1-5/8-Inch DOM
Explicitly intended for roll cages and chassis fabrication, with 1.625-inch outside diameter, .120-inch wall, DOM construction, and a 7-foot length.
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Larger DiameterSpeedway Motors 1-3/4-Inch DOM
DOM tubing is specifically listed for roll cages and chassis, with a 1.75-inch outside diameter, .095-inch wall, and 7-foot option.
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DOM AlternativeAllstar Performance 1-5/8-Inch DOM
This DOM option matches the 1-5/8-inch diameter and .120-inch wall of a common cage configuration, and comes in a 7.5-foot length.
View on Amazon- Thicker 1-3/4-Inch Speedway Motors 1-3/4-Inch Mild Steel
- Short Cut Length Speedway Motors 3-Foot DOM
Compare the tubing options and key dimensions
Detailed Reviews: Best Tubing For Roll Cage
#1 · Best Overall
1. Speedway Motors 1-5/8-Inch DOM
- Dimensions: 84"L x 0.9"W
- Weight: 14 lb
- Material Type: Steel
Best for: Common-size DOM cage tubing.
Why it ranks #1: Explicitly intended for roll cages and chassis fabrication, with 1.625-inch outside diameter, .120-inch wall, DOM construction, and a 7-foot length.
The 1-5/8-inch O.D. and .120-inch wall make this seven-foot Speedway Motors tube a clearly dimensioned DOM option for cage and chassis fabrication. Drawn-over-mandrel steel is specified for consistent wall thickness, supporting builders who want that construction type in a familiar motorsports application.
DOM steel is identified as the material, with consistent wall thickness cited as a construction benefit for structural fabrication. The 1-5/8-inch outside diameter and .120-inch wall give builders useful measurements to match against a design, while the seven-foot pre-cut length provides a ready section for laying out work. Listed uses include roll cages, roll bars, chassis, bumpers, and nerf bars. The tube is also offered in other lengths, according to the description.
- Drawn-over-mandrel steel
- 1-5/8-inch outside diameter
- .120-inch wall thickness
- Seven-foot pre-cut length
- This listing supplies a seven-foot section, which may exceed a small repair's needs.
Skip it if you need a short repair piece; this listing specifies a seven-foot length.
Pick this for a project specifying 1-5/8-inch O.D., .120-inch-wall DOM steel and a seven-foot section. Its listed applications span cages and chassis as well as bars and bumpers, but the length should suit your cutting and layout plan.
Full product details
| Brand | Speedway Motors |
|---|---|
| Color | Plain |
| Included Components | Includes product as described |
| Item Dimensions L x W | 84"L x 0.9"W |
| Item Weight | 14 pounds |
| Manufacturer | Speedway Motors |
| Manufacturer Warranty Description | See Return Policy |
| Material | Steel |
| Dimensions | 84"L x 0.9"W |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
Listed on Amazon as: Speedway Motors Round DOM Roll Cage Tubing, 1-5/8 Inch OD x .120 Inch Wall, 7 Foot Length, Ideal for Roll Cages, Chassis Fabrication, Roll Bars, Bumpers and Nerf Bars
View on Amazon#2 · Larger Diameter
2. Speedway Motors 1-3/4-Inch DOM
- Dimensions: 84"L x 1.8"W
- Weight: 13 lb
- Material Type: Steel
Best for: DOM cage fabrication.
Why it ranks #2: DOM tubing is specifically listed for roll cages and chassis, with a 1.75-inch outside diameter, .095-inch wall, and 7-foot option.
A 1.75-inch outside diameter paired with a .095-inch wall gives this Speedway Motors tube a clearly specified starting point for cage and chassis fabrication. Its 1020 DOM construction and seven-foot pre-cut length make it relevant to builders planning structural tubing work without beginning from an uncut stock length.
The 1020 drawn-over-mandrel steel is described as having uniform wall thickness, a useful characteristic when fabricating a cage or chassis from consistent tubing. At 1.75 inches O.D. and .095 inch wall, its dimensions are stated plainly for comparison with a build plan. The seven-foot cut is a manageable section for repair or custom fabrication, and the listing also identifies roll bars, bumpers, and nerf bars as possible uses. Confirm the dimensions against your project requirements.
- 1020 DOM steel construction
- 1.75-inch outside diameter
- .095-inch wall thickness
- Seven-foot pre-cut length
- The listed wall is .095 inch, not a thicker .109-inch option.
Skip it if you need a .109-inch wall; this tube is specified at .095 inch.
Choose it for a roll-cage or chassis project calling for 1.75-inch O.D., .095-inch-wall 1020 DOM steel in a seven-foot section. Its dimensions and material are explicit; make sure they match your fabrication plan before ordering.
Full product details
| Brand | Speedway Motors |
|---|---|
| Color | Plain |
| Included Components | Includes product as described |
| Item Dimensions L x W | 84"L x 1.8"W |
| Item Weight | 13 pounds |
| Manufacturer | Speedway Motors |
| Manufacturer Warranty Description | See Return Policy |
| Material | Steel |
| Dimensions | 84"L x 1.8"W |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
Listed on Amazon as: Round DOM Roll Cage Tubing, 1-3/4 x .095 Inch, 7 Foot Length
View on Amazon#3 · DOM Alternative
3. Allstar Performance 1-5/8-Inch DOM
- Dimensions: 90"L x 1.63"W
- Weight: 4.6 lb
- Material Type: Steel
Best for: DOM tube in 7.5-foot length.
Why it ranks #3: This DOM option matches the 1-5/8-inch diameter and .120-inch wall of a common cage configuration, and comes in a 7.5-foot length.
This Allstar Performance tube combines a 7.5-foot cut with round DOM steel construction, giving fabricators both a named process and a specified working length. Its 1-5/8-inch outside diameter and .120-inch wall establish the dimensions for cage, chassis, or related fabrication planning.
The DOM designation distinguishes this Allstar tube from the mild-steel round option, while its 1-5/8-inch O.D. and .120-inch wall provide the concrete measurements needed for comparing a build plan. The 7.5-foot cut provides a slightly longer working section than seven-foot stock, potentially simplifying layout for a project that uses that length. It is steel tubing intended for shop, trailer, and track specialty use; confirm the stated dimensions suit your intended application.
- Round DOM steel construction
- 1-5/8-inch outside diameter
- .120-inch wall thickness
- 7.5-foot pre-cut length
- The supplied description lists a 7.5-foot section, not a shorter three-foot cut.
Skip it if you need only a compact three-foot section; this listing specifies 7.5 feet of tubing.
A useful candidate for a DOM-spec fabrication plan calling for 1-5/8-inch O.D. and .120-inch wall, especially when a 7.5-foot section suits the layout. Check that length and dimensions work for the intended cage or chassis.
Full product details
| Brand | Allstar Performance |
|---|---|
| Color | Silver |
| Included Components | Round DOM Steel Tubing 1-5/8in x .120in x 7.5ft |
| Item Dimensions L x W | 90"L x 1.63"W |
| Item Weight | 4.6 pounds |
| Manufacturer | Allstar Performance |
| Manufacturer Warranty Description | 30 Days |
| Material | Steel |
| Dimensions | 90"L x 1.63"W |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
Listed on Amazon as: Allstar Round DOM Steel Tubing 1-5/8in x .120in x 7.5ft
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#4 · Thicker 1-3/4-Inch
4. Speedway Motors 1-3/4-Inch Mild Steel
- Dimensions: 84"L x 2"W
- Weight: 14 lb
- Material Type: Steel
Best for: Thicker-wall mild steel choice.
Why it ranks #4: HREW 1020 mild steel has a 1.75-inch outside diameter and .109-inch wall, and its listing identifies roll-cage use.
A .109-inch wall is the defining specification of this Speedway Motors 1.75-inch mild-steel tubing, setting it apart for builders whose fabrication plan calls for that thickness. The seven-foot section is made from HREW 1020 steel and is listed specifically for roll-cage applications.
The HREW 1020 mild-steel construction identifies the material, while the 1.75-inch outside diameter and .109-inch wall provide concrete dimensions to compare with a cage design. Its seven-foot length gives a pre-cut section for fabrication, rather than requiring a builder to start with longer stock. The listing mentions pre-notched tubing wherever necessary, which may reduce preparation at those locations; check the supplied piece and planned joints as part of the fabrication workflow.
- HREW 1020 mild-steel tubing
- 1.75-inch outside diameter
- .109-inch wall thickness
- Seven-foot pre-cut length
- The listed material is mild steel, not 4130 chromoly.
Skip it if you require 4130 chromoly; this listed tubing is HREW 1020 mild steel.
This suits a builder whose roll-cage plan specifies 1.75-inch O.D. HREW 1020 tubing with a .109-inch wall. The seven-foot section and listed pre-notching are useful workflow details, but the material and dimensions must fit the intended design.
Full product details
| Brand | Speedway Motors |
|---|---|
| Color | Plain |
| Included Components | Includes product as described |
| Item Dimensions L x W | 84"L x 2"W |
| Item Weight | 14 pounds |
| Manufacturer | Speedway Motors |
| Manufacturer Warranty Description | See Return Policy |
| Material | Steel |
| Dimensions | 84"L x 2"W |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
Listed on Amazon as: Mild Steel Roll Cage Tubing, 1-3/4 OD, .109 Wall, 7 Ft.
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#5
5. Allstar Performance 1-5/8-Inch Mild Steel
- Dimensions: 90"L x 1.63"W
- Material Type: Steel
Best for: Long mild-steel fabrication section.
Why it ranks #5: Its 1-5/8-inch outside diameter and .120-inch wall suit buyers comparing matching dimensions, though the listing describes mild steel rather than DOM.
At 7.5 feet long, this Allstar Performance mild-steel round tube offers a longer pre-cut section than a seven-foot piece. Its 1-5/8-inch outside diameter and .120-inch wall provide key dimensions for a builder planning chassis or other motorsports fabrication.
The listed 1-5/8-inch O.D. and .120-inch wall let fabricators compare this steel tube directly with a project specification before cutting. Its 7.5-foot length supplies more stock than a seven-foot section, giving a little more material to lay out for a custom task. The product is identified as mild steel round tubing, but the supplied information does not specify DOM construction. Treat it as a distinct material choice when selecting tubing for a cage or chassis.
- Mild-steel round tubing
- 1-5/8-inch outside diameter
- .120-inch wall thickness
- 7.5-foot length
- The supplied product details identify mild steel, not DOM tubing.
Skip it if you require documented DOM construction; these supplied details specify mild steel without identifying it as DOM.
Consider this for fabrication requiring 1-5/8-inch mild-steel round tubing with a .120-inch wall and 7.5-foot length. It offers a longer section than a seven-foot cut, but buyers requiring documented DOM construction should select accordingly.
Full product details
| Brand | Allstar Performance |
|---|---|
| Color | Silver |
| Included Components | Mild Steel Round Tubing 1-5/8in x .120in x 7.5ft |
| Item Dimensions L x W | 90"L x 1.63"W |
| Manufacturer | Allstar Performance |
| Material | Steel |
| Dimensions | 90"L x 1.63"W |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
Listed on Amazon as: Allstar Performance Mild Steel Round Tubing 1-5/8in x .120in x 7.5ft
View on Amazon#6 · Short Cut Length
6. Speedway Motors 3-Foot DOM
- Dimensions: 0.9"L x 0.9"W
- Weight: 7 lb
- Material Type: Steel
Best for: Short DOM repair section.
Why it ranks #6: The 1-5/8-inch DOM tube has a .120-inch wall and is explicitly listed for roll cages; its 3-foot length suits smaller fabrication needs.
A three-foot pre-cut length is the defining feature of this Speedway Motors DOM tube, offering a shorter section for focused fabrication work. It retains the 1-5/8-inch outside diameter and .120-inch wall listed on the brand's longer DOM tubing, in a steel round-tube format.
The three-foot cut can limit excess stock when a project needs a short section, while the 1-5/8-inch O.D. and .120-inch wall provide dimensions to match against the intended assembly. DOM steel construction is specified for structural use, and listed applications include roll cages, race-car chassis, roll bars, bumpers, and nerf bars. Compared with a longer length of the same stated dimensions, it leaves less material for an extended layout, so plan cuts and required pieces first.
- Round DOM steel construction
- 1-5/8-inch outside diameter
- .120-inch wall thickness
- Three-foot pre-cut section
- The three-foot length provides less stock for extended fabrication than a seven-foot section.
Skip it if you need a longer continuous section; this listing supplies only three feet of tubing.
Use this for a compact repair or fabrication task calling for 1-5/8-inch O.D., .120-inch-wall DOM steel. The short section can suit limited work, but larger layouts may require a longer cut or additional material.
Full product details
| Brand | Speedway Motors |
|---|---|
| Color | Plain |
| Included Components | Includes product as described |
| Item Dimensions L x W | 0.9"L x 0.9"W |
| Item Weight | 7 pounds |
| Manufacturer | Speedway Motors |
| Manufacturer Warranty Description | See Return Policy |
| Material | Steel |
| Dimensions | 0.9"L x 0.9"W |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
Listed on Amazon as: Speedway Motors Round DOM Roll Cage Tubing 1-5/8 Inch Outside Diameter x .120 Wall 3 Foot Length Steel Tube for Roll Cages Race Car Chassis and Fabrication Projects
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#7
7. Speedway Motors 1-5/8-Inch Chromoly
- Dimensions: 84"L x 1"W
- Weight: 10 lb
- Material Type: Chromoly
Best for: 4130 tubing for cage builders.
Why it ranks #7: This 4130 chromoly tube is listed for roll cages and chassis, with a 1.625-inch outside diameter, .083-inch wall, and 7-foot length.
This Speedway Motors tube uses 4130 chromoly steel, the defining material choice for fabricators seeking a chromoly section for a roll cage or chassis. It pairs a 1-5/8-inch outside diameter with a .083-inch wall and arrives in a seven-foot pre-cut length.
The 4130 chromoly construction and specified .083-inch wall give builders material and thickness details to compare with their fabrication requirements. Its 1.625-inch O.D. is also stated, helping establish a dimensional match before layout. A seven-foot pre-cut section reduces the need to begin with longer stock, and the listing names roll cages, chassis, roll bars, bumpers, and nerf bars among its uses. The relatively thin stated wall is a decision point for projects specifying a different thickness.
- 4130 chromoly steel
- 1.625-inch outside diameter
- .083-inch wall thickness
- Seven-foot pre-cut section
- The .083-inch wall is thinner than the .120-inch chromoly-free DOM options listed here.
Skip it if you need a .120-inch wall; this chromoly tube is specified at .083 inch.
This is for builders whose project calls for 1-5/8-inch O.D. 4130 chromoly with a .083-inch wall and a seven-foot cut. Use the stated dimensions as a project check, particularly when the design specifies a thicker wall.
Full product details
| Brand | Speedway Motors |
|---|---|
| Color | Plain |
| Included Components | Includes product as described |
| Item Dimensions L x W | 84"L x 1"W |
| Item Weight | 10 pounds |
| Manufacturer | Speedway Motors |
| Manufacturer Warranty Description | See Return Policy |
| Material | Chromoly |
| Dimensions | 84"L x 1"W |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
Listed on Amazon as: Round Chromoly Chassis Tube, 1-5/8 x 0.083 Inch, 7 Foot Length
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#8
8. Speedway Motors 1-1/4-Inch Chromoly
- Dimensions: 73.1"L x 1.5"W
- Weight: 7 lb
- Material Type: Chromoly
Best for: Compact-diameter chromoly fabrication.
Why it ranks #8: The 4130 chromoly tube is listed for roll-cage and chassis fabrication, but its 1.25-inch outside diameter and .065-inch wall narrow its fit.
A 1.25-inch outside diameter makes this seven-foot Speedway Motors 4130 chromoly tube a compact-diameter option among the listed sections. Its .065-inch wall and pre-cut length give chassis and race-fabrication builders specific dimensions to consider when laying out a project.
This tube is made from 4130 chromoly and measures 1.25 inches O.D. with a .065-inch wall, so a builder can assess its material and dimensions against a planned assembly. The seven-foot pre-cut section is described as reducing cutting time and material waste, which can simplify initial layout. Listed applications include roll cages, race-car chassis, roll bars, bumpers, and nerf bars. Its smaller diameter is a key fit consideration where a project specifies larger tubing.
- 4130 chromoly steel
- 1.25-inch outside diameter
- .065-inch wall thickness
- Seven-foot pre-cut length
- Its 1.25-inch outside diameter is smaller than the listed 1-5/8-inch options.
Skip it if you need a 1-5/8-inch outside diameter; this tubing measures 1.25 inches.
Choose this for a fabrication plan that calls for 1.25-inch O.D. 4130 chromoly with a .065-inch wall. The seven-foot cut supports layout work, but its compact diameter makes matching the specified tube size essential.
Full product details
| Brand | Speedway Motors |
|---|---|
| Color | Silver |
| Included Components | Includes product as described |
| Item Dimensions L x W | 73.1"L x 1.5"W |
| Item Weight | 7 pounds |
| Manufacturer | Speedway Motors |
| Manufacturer Warranty Description | See Return Policy |
| Material | Chromoly |
| Dimensions | 73.1"L x 1.5"W |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
Listed on Amazon as: Round Chromoly Chassis Tube, 1-1/4 x 0.065 Inch, 7 Foot Length
View on Amazon
#9
9. Speedway Motors 1-Inch Chromoly 0.065
- Dimensions: 84"L x 1"W
- Weight: 5 lb
- Material Type: Chromoly
Best for: Thicker-wall one-inch chromoly.
Why it ranks #9: This 4130 chromoly option is listed for roll cages, but its 1-inch outside diameter and .065-inch wall may not match primary cage requirements.
This Speedway Motors tube pairs a one-inch outside diameter with a .065-inch wall, making it the thicker-wall one-inch chromoly choice in this lineup. Its 4130 construction and seven-foot length give chassis and cage fabricators a defined section for planning custom work.
The 4130 chromoly material is specified for demanding automotive applications, while the one-inch O.D. and .065-inch wall let builders check its size against a fabrication plan. Its seven-foot pre-cut length supplies a practical section for layout without starting from longer stock. Listed uses include roll cages, roll bars, race-car chassis, bumpers, and nerf bars. Compared with the one-inch .058-inch-wall option, this tube has a thicker stated wall, which is the central selection distinction.
- 4130 chromoly steel
- One-inch outside diameter
- 0.065-inch wall thickness
- Seven-foot pre-cut length
- Its one-inch outside diameter is smaller than the listed 1-5/8-inch chromoly option.
Skip it if you require 1-5/8-inch tubing; this section measures one inch in outside diameter.
Select this for a project calling for one-inch O.D. 4130 chromoly with a .065-inch wall and a seven-foot cut. It offers a thicker wall than the listed .058-inch one-inch option, but its diameter must match the design.
Full product details
| Brand | Speedway Motors |
|---|---|
| Color | Plain |
| Included Components | Includes product as described |
| Item Dimensions L x W | 84"L x 1"W |
| Item Weight | 5 pounds |
| Manufacturer | Speedway Motors |
| Manufacturer Warranty Description | See Return Policy |
| Material | Chromoly |
| Dimensions | 84"L x 1"W |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
Listed on Amazon as: Round Chromoly Chassis Tube, 1 x 0.065 Inch, 7 Foot Length, Universal Fit
View on Amazon
#10
10. Speedway Motors 1-Inch Chromoly 0.058
- Dimensions: 73.1"L x 1"W
- Weight: 5 lb
- Material Type: Chromoly
Best for: One-inch 4130 tubing section.
Why it ranks #10: Although listed for roll cages and made from 4130 chromoly, its 1-inch diameter and .058-inch wall make it the narrowest-spec option here.
This Speedway Motors tube specifies a one-inch outside diameter and 0.058-inch wall, making its compact dimensions its clearest distinction. The seven-foot section is 4130 chromoly steel and is listed for roll cages, chassis, and other race-car fabrication projects.
Its 4130 chromoly material and 0.058-inch wall are specified alongside a one-inch O.D., giving a fabricator clear information for checking a design requirement. The pre-cut seven-foot length offers a defined section for layout and cutting, while listed uses include cages, chassis, roll bars, bumpers, and nerf bars. This is the thinner-wall one-inch option compared with Speedway Motors' 1-inch, .065-inch tube, so the wall specification matters when choosing between them.
- 4130 chromoly steel
- One-inch outside diameter
- 0.058-inch wall thickness
- Seven-foot pre-cut length
- The .058-inch wall is thinner than the listed one-inch .065-inch chromoly tube.
Skip it if you need a .065-inch wall at one inch O.D.; this tube is specified at .058 inch.
This fits a project specifying one-inch O.D. 4130 chromoly with a .058-inch wall and a seven-foot section. Its dimensions suit a precise fabrication plan, but the thinner wall separates it from the other listed one-inch Speedway Motors tube.
Full product details
| Brand | Speedway Motors |
|---|---|
| Color | Plain |
| Included Components | Includes product as described |
| Item Dimensions L x W | 73.1"L x 1"W |
| Item Weight | 5 pounds |
| Manufacturer | Speedway Motors |
| Manufacturer Warranty Description | See Return Policy |
| Material | Chromoly |
| Dimensions | 73.1"L x 1"W |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
Listed on Amazon as: Speedway Motors 1 Inch Round Chromoly Chassis Tube 0.058 Wall Thickness, 7 Foot Length, 4130 Steel Tubing for Roll Cages, Chassis Fabrication, Universal Fit
View on AmazonWhy matching tube dimensions matters
Do not treat a similar-looking diameter as proof that two tubes are interchangeable; the outside diameter and wall thickness both need to match your design. For example, the Speedway Motors 1-5/8-Inch DOM and Allstar Performance 1-5/8-Inch DOM share a 1.625-inch diameter and .120-inch wall, while the Speedway Motors 1-5/8-Inch Chromoly uses a .083-inch wall. The 1-3/4-inch options also differ: the DOM tube has a .095-inch wall, while the HREW mild-steel tube has a .109-inch wall.
That means a diameter-only comparison misses a key specification. A second trap is assuming any tube listed for roll cages works in any cage position.
These listings do not identify approved locations, vehicle-specific requirements, or sanctioning-body compliance. Verify the exact specification against your cage design and applicable rules before cutting or welding.
Plan around pre-cut tube lengths
Choose a length based on your cut plan and handling needs, not simply the longest tube available. Most of these options are offered as a 7-foot section; the Allstar Performance 1-5/8-Inch DOM is 7.5 feet, and the Speedway Motors 3-Foot DOM is a shorter, explicitly pre-cut choice. Some Speedway Motors product descriptions say lengths of 3, 7, or 10 feet are available, while the individual product titles specify a particular length.
Confirm the selected listing’s exact length before ordering, since a general description of available options does not guarantee that every length is selected. Short sections can suit limited fabrication jobs but may not provide the continuous material your layout needs.
Longer sections can give more planning flexibility, but the product data does not state shipping or handling limits. Map each required piece, account for cuts, and confirm the delivered length before starting.
How to Choose Roll-Cage Tubing
Material and tube type
Start by selecting the material and tube type specified for your cage design. This group includes DOM steel, HREW 1020 mild steel, other mild steel, and 4130 chromoly. Speedway Motors 1-5/8-Inch DOM and Allstar Performance 1-5/8-Inch DOM both identify DOM construction, while Speedway Motors 1-3/4-Inch Mild Steel is identified as HREW 1020.
The chromoly choices include diameters from 1 inch to 1-5/8 inches. These material names are not interchangeable certifications, and the listings do not establish suitability under a particular rulebook.
Buyers whose design calls for DOM can compare the DOM options; those whose documented design specifies 4130 should focus on the chromoly tubes. Follow the design and applicable competition requirements rather than choosing by material name alone.
Outside diameter and wall thickness
Match both the outside diameter and wall thickness to the cage design, since either dimension can rule out an otherwise similar tube. The listed diameters span 1 inch to 1-3/4 inches, and wall thicknesses span .058 to .120 inch. For example, Speedway Motors 1-5/8-Inch DOM measures 1.625 inches by .120 inch, while Speedway Motors 1-5/8-Inch Chromoly uses the same nominal diameter with a .083-inch wall.
The 1-3/4-inch choices include a .095-inch DOM wall and a .109-inch HREW wall. A buyer with a specified 1-5/8-inch, .120-inch requirement can compare the matching DOM products; a buyer whose plan calls for another size should use that exact specification to filter the options.
Do not infer compliance from dimensions alone.
Length and fabrication quantity
Choose a section length that fits your cut plan and the amount of material needed for the job. The individual products include 3-foot, 7-foot, and 7.5-foot lengths; several Speedway Motors descriptions also mention availability in 3-, 7-, or 10-foot lengths. The Speedway Motors 3-Foot DOM is the explicit short-section option, while Allstar Performance 1-5/8-Inch DOM gives a 7.5-foot section.
Many others are listed at 7 feet. Buyers replacing a short section or making a limited fabrication part may prefer a shorter tube; a larger layout may require longer stock or multiple sections.
Check the chosen product’s actual selected length and plan cuts before ordering. The listings do not specify how much usable material remains after trimming.
Which Roll-Cage Tubing Should You Choose?
For a broadly useful, explicitly roll-cage-focused DOM choice, select Speedway Motors 1-5/8-Inch DOM: its 1.625-inch diameter and .120-inch wall are clearly stated, with a 7-foot length. If your design calls for 1-3/4-inch DOM, choose Speedway Motors 1-3/4-Inch DOM; for a 1-3/4-inch HREW tube with a .109-inch wall, consider Speedway Motors 1-3/4-Inch Mild Steel. Allstar Performance 1-5/8-Inch DOM offers the same nominal diameter and wall as the lead pick in a 7.5-foot section.
For 4130 chromoly, compare Speedway Motors 1-5/8-Inch Chromoly and the smaller-diameter options only when those exact specifications suit your design. Confirm the cage rules and required material, diameter, and wall thickness before purchasing.
Frequently Asked Questions
How do I confirm tubing dimensions comply with my racing organization’s roll-cage rules?
Check the current rules for your specific vehicle class and cage application, including permitted material, outside diameter, and wall thickness. Compare each requirement with the product listing, then confirm any unclear points with the organization or a qualified cage builder. A listing’s dimensions alone do not establish compliance for your application.
What tools and bending methods are suitable for fabricating a cage from DOM or 4130 tubing?
Use a tube bender and tooling suited to the tubing’s diameter, wall, and material, and follow the equipment maker’s guidance. DOM and 4130 are not interchangeable material descriptions, so verify the required process with a qualified fabricator. Plan cuts, bends, and fit-up against the cage design before fabrication.
How can I check whether pre-cut tubing will ship safely and arrive straight?
Before ordering, review the listed section length and ask the seller how the tube will be packaged and handled in transit. On delivery, inspect it for visible bends, dents, or shipping damage before fabrication. If its condition appears compromised, document the issue and contact the seller before attempting to straighten or use it.
How should I choose between DOM, mild steel, and 4130 chromoly tubing?
Start with the material specified by your cage design and competition rules, then compare only listings that match its required dimensions. The products here include DOM, mild steel, and chromoly options, but the titles alone do not establish which material is suitable for a particular vehicle. Confirm the choice with a qualified builder if needed.
When should I choose a shorter tubing section?
Choose a shorter section when its listed length fits the planned cuts and fabrication sequence, while accounting for the design’s actual tube requirements. This selection includes 3-foot, 7-foot, and 7.5-foot options. Do not assume a section is sufficient based only on length; check the complete design and avoid relying on unverified splicing plans.
Final Words
For a broadly useful, explicitly roll-cage-focused DOM option, the Speedway Motors 1-5/8-inch tube has a stated 1.625-inch outside diameter, .120-inch wall, and 7-foot length. Choose another option only when its listed material and dimensions match your design, such as 1-3/4-inch DOM or mild steel. Before buying, verify the required material, diameter, and wall thickness against your vehicle’s design and competition rules.
