1.750" 4130 Chromoly Tubing
1.750" OD is the diameter most often called for when a vehicle is too heavy for a 1.500" cage. In 4130 it is normally ordered in 0.095" or 0.120" wall for main hoops, A-pillar bars and primary chassis members.
Where 1.750" OD 4130 Tube Is Used
Road racing, rally and off-road rulebooks commonly step up to 1.750" as vehicle weight increases. The larger diameter gives a useful gain in bending stiffness for a small weight penalty, which is why it is preferred over simply thickening a 1.500" tube.
Outside motorsport the size is used for machinery guards, lifting frames and tubular axles. When the tube will be bent into a hoop, order enough length to bend the hoop from one piece; joints in a main hoop are not normally permitted.
Ordering 1.750" OD Tubing
State OD, wall, condition and standard, and mention the longest single piece you need so lengths can be selected accordingly. The 0.095" wall and 0.120" wall pages compare the two walls most often paired with this diameter.
1.750" OD 4130 Tubing: Wall, Bore and Weight Table
The table lists the bore, metal cross-section and theoretical weight for 1.750" (44.45 mm) outside diameter across the walls normally requested in cold drawn seamless 4130.
| Wall (in) | Wall (mm) | ID (in) | ID (mm) | Section area (in²) | Weight (lb/ft) | Weight (kg/m) |
|---|---|---|---|---|---|---|
| 0.035" | 0.89 | 1.680" | 42.67 | 0.189 | 0.64 | 0.95 |
| 0.049" | 1.24 | 1.652" | 41.96 | 0.262 | 0.89 | 1.33 |
| 0.058" | 1.47 | 1.634" | 41.50 | 0.308 | 1.05 | 1.56 |
| 0.065" | 1.65 | 1.620" | 41.15 | 0.344 | 1.17 | 1.74 |
| 0.083" | 2.11 | 1.584" | 40.23 | 0.435 | 1.48 | 2.20 |
| 0.095" | 2.41 | 1.560" | 39.62 | 0.494 | 1.68 | 2.50 |
| 0.120" | 3.05 | 1.510" | 38.35 | 0.614 | 2.09 | 3.11 |
| 0.156" | 3.96 | 1.438" | 36.53 | 0.781 | 2.66 | 3.96 |
| 0.188" | 4.78 | 1.374" | 34.90 | 0.923 | 3.14 | 4.67 |
| 0.250" | 6.35 | 1.250" | 31.75 | 1.178 | 4.01 | 5.97 |
Values are calculated from nominal dimensions (weight = (OD − wall) × wall × 10.69). A row in this table is a dimensional reference, not a statement that the size is held in stock; confirm availability when you enquire.
Frequently Asked Questions
What does 1.750" × 0.120" 4130 tubing weigh?
About 2.09 lb/ft, or 3.11 kg/m, from nominal dimensions.
Is 1.750" × 0.095" 4130 accepted for roll cages?
It is accepted in some classes and not in others. Minimum dimensions depend on vehicle weight and sanctioning body, so check the current rulebook.
What length should I order for a main hoop?
Measure the developed length of the hoop including both legs and add an allowance for the bender. Ask for a length that covers it in one piece.
What is the bore of 1.750" × 0.095" tubing?
The nominal inside diameter is 1.560".
Enquire for 1.750" OD 4130 Tubing
Provide your required wall thickness, condition, standard, and footage for a 1.750" OD 4130 quotation.
- OD: 1.750"
- Wall Thickness
- Standard (ASTM A519)
- Condition
- Footage / Quantity
- MTC 3.1 required
- Delivery