Product Description
The SU S641-XL-A aftermarket load wheel assembly is designed for optimal performance in standard pallet jack applications. This durable polyurethane wheel features a 4-inch diameter and a 2-7/8 inch width, making it an ideal replacement component for Superior equipment.
Specifications: 4.000 inch diameter x 2.875 inch width (4.000" x 2.875" | 4 x 2.88 wheel | 4 x 2.875 | 101.60mm x 73.02mm) | Bearing ID: 20mm (0.787 inch bore | 20.000mm ID)
• Constructed from high-quality polyurethane for enhanced durability
• 97-A Shore hardness for excellent wear resistance
• Complete assembly includes integrated bearing and axle shaft
This load wheel assembly is compatible with various pallet jack models, ensuring reliable operation and easy installation.
Specifications
Material & Construction
| Wheel Material | Polyurethane compound |
| Durometer Hardness | 97-A Shore hardness rating |
Part Numbers & Compatibility
| OEM Part Number | SU S641-XL-A |
| Base Model Reference | SU S641-XL |
Frequently Asked Questions
Q: What does the A designation mean in SU S641-XL-A?
A: The A suffix indicates this is the assembled configuration. The SU S641-XL-A arrives with the bearing pre-installed in the hub. You do not need to press a bearing yourself. This is different from core-only components that require bearing installation before mounting to the axle.
Q: What is the bearing bore ID for the SU S641-XL-A?
A: The bearing bore ID is 20mm, equivalent to 0.787 inch. This matches standard 3/4 inch axles found on Superior equipment and compatible pallet jacks. Verify your axle diameter before ordering. Installing on a different sized axle will cause wobble or wheel seizure.
Q: Is the SU S641-XL-A ready for immediate installation?
A: Yes. The SU S641-XL-A is fully assembled and ready to install. Slide it onto the axle, install the retaining fastener or cotter pin, and verify the wheel rotates freely. No additional bearing installation or modification is required. This saves installation time compared to core-only wheels.
Q: How do I replace a failed SU S641-XL-A in the field?
A: Support the truck on jack blocks. Remove the cotter pin or fastener holding the wheel. Slide the old wheel off the axle. Clean the axle bore with a wire brush to remove rust or debris. Slide the new SU S641-XL-A onto the axle. Install a new cotter pin and verify the wheel rotates without binding. Do not operate until all wheels are verified.
Q: What is the expected service life of the SU S641-XL-A in warehouse use?
A: Typical lifespan is 2 to 3 years with routine maintenance on standard warehouse floors. Life may extend to 4 years on clean, smooth concrete. Rough floors or excess loads reduce lifespan to 1 to 2 years. Replace all four wheels as a matched set to maintain balanced truck handling and prevent steering drift.