Product Description
Load Wheel
Specifications: 4.000 inch diameter x 2.750 inch width (4.000" x 2.750" | 4 x 2.75 wheel | 4 x 2-3/4 | 101.60mm x 69.85mm)
Specifications
Wheel Dimensions
| Material | Cushothane XL |
| Outside Diameter | 4 |
| Inside Diameter | 1.875 |
| Width Side to Side | 2.75 |
| Tread Profile | 1/4 Radius |
| Bore Depth | 0.812 |
| Hub Width | 2.75 |
| Bore Outside Diameter | 2.4404 |
Frequently Asked Questions
Q: What trucks use the SU 143 load wheel and what are cross-brand equivalents?
A: The SU 143 is a 4 inch x 2.75 inch (101.60mm x 69.85mm) load wheel made of Cushothane XL and fits many mid-size electric pallet jacks including Crown, Raymond, and Toyota models. Cross-brand equivalents include Crown part 018753-001 and Raymond part 81-120-110. Always confirm the bore diameter (1.875 inch ID) and tread profile (1/4 radius) match your existing wheel before ordering.
Q: Can the SU 143 load wheel be installed on a truck that originally used rubber load wheels?
A: Yes, if the bore hole, diameter, and width match. Cushothane XL is a synthetic elastomer that provides excellent grip and durability on indoor floors. However, verify that your axle bolt and hub assembly are compatible with the 1.875 inch bore diameter and 0.812 inch bore depth. Mixing wheel types (rubber and Cushothane) on the same axle is not recommended due to different load distribution.
Q: What load does a single SU 143 wheel support?
A: The SU 143 load wheel typically supports 800 to 1200 pounds per wheel depending on truck design and axle configuration. Most lift trucks use two to four load wheels. Never exceed the truck nameplate capacity. Overloading causes permanent deformation, cracking, and early bearing failure.
Q: How do I know if the SU 143 load wheel needs replacement?
A: Replace the wheel if the sidewall shows cracks, if chunks of material are missing, if it is visibly flat-spotted or deformed, or if it rolls with a grinding sound (indicating bearing wear). If the truck drifts to one side under load, check for uneven wheel wear on that side. Worn load wheels reduce steering control and increase lateral stress on the mast.
Q: What is the 1/4 radius tread profile on the SU 143 and why does it matter?
A: The 1/4 radius profile is a gentle curved edge on the wheel perimeter. It allows the wheel to roll smoothly without catching on slight floor irregularities or gaps. A sharper edge profile can catch and lock up on uneven surfaces. The 1/4 radius balances maneuverability and stability on typical warehouse flooring.
Q: Does the SU 143 work on wet or slippery floors?
A: Cushothane XL provides good traction on dry and lightly wet floors. On wet, oily, or icy surfaces, traction may be reduced. Test the truck carefully before loading heavy pallets on slippery floors. If traction is inadequate, consider equipment rated for wet environments or use wheel covers designed to increase grip. Never exceed rated capacity on slippery surfaces.