Product Description
Load Wheel
Specifications: 3.250 inch diameter x 4.310 inch width (3.250" x 4.310" | 3.25 x 4.31 wheel | 3-1/4 x 4.31 | 82.55mm x 109.47mm)
Specifications
Wheel Dimensions
| Material | Cushothane XL |
| Outside Diameter | 3.25 |
| Inside Diameter | 1.875 |
| Width Side to Side | 4.31 |
| Bore Depth | 0.2 |
| Hub Width | 4.31 |
| Bore Outside Diameter | 2.07 |
Frequently Asked Questions
Q: What does the XL designation mean on the SU 446-XL?
A: XL refers to Cushothane XL, a heavy-duty polyurethane compound engineered for extended load and wear cycles. The SU 446-XL uses this premium material instead of standard urethane, providing superior abrasion resistance and longer service life in demanding applications.
Q: What are the specifications of the SU 446-XL wheel?
A: The SU 446-XL is 3.25 inches (82.55mm) in outside diameter and 4.31 inches (109.47mm) in width. Inside diameter is 1.875 inches; bore outside diameter is 2.07 inches with 0.2 inch bore depth. Hub width is 4.31 inches. All dimensions match the standard SU 446.
Q: Should I use the SU 446-XL or standard SU 446 wheel?
A: Use the SU 446-XL if your truck operates in heavy-duty environments: outdoor use, rough concrete, high-traffic warehouses, or extended 24-hour shifts. Use the standard SU 446 for light to moderate indoor use. The XL costs 20-30 percent more but lasts 50 percent longer under heavy loads.
Q: Can I mix SU 446-XL wheels with standard SU 446 wheels on the same truck?
A: You can, but it is not recommended. Mismatched wheel wear rates create steering problems and uneven load distribution. If upgrading to SU 446-XL, replace all four load wheels at the same time for consistent performance and control.
Q: What load capacity does the SU 446-XL support?
A: The wheel itself does not limit capacity. Load capacity is determined by the truck hub bearings and frame design. The Cushothane XL material maintains integrity under the full rated load of your truck. Check your truck manual for maximum load specifications.
Q: Is the SU 446-XL worth the extra cost?
A: Yes, if your truck operates more than 40 hours per week or on rough surfaces. The extended lifespan reduces downtime and replacement frequency. Calculate your cost-per-hour of operation over 3 years. The SU 446-XL typically delivers 30-50 percent lower total cost of ownership.