Product Description
Poly Load Wheel Assembly, 97-A
Specifications: 3.250 inch diameter x 6.000 inch width (3.250" x 6.000" | 3.25 x 6 wheel | 3-1/4 x 6 | 82.55mm x 152.40mm)
Specifications
Wheel Dimensions
| Material | Cushothane XL |
| Outside Diameter | 3.25 |
| Inside Diameter | 1.938 |
| Width Side to Side | 6 |
| Bore Depth | 0.812 |
| Hub Width | 6 |
| Bore Outside Diameter | 2.0467 |
| Tread Profile |
Frequently Asked Questions
Q: What is the difference between SU S529-XL-A and SU S529-A?
A: Both are complete assemblies with pre-installed bearings and hubs. The difference is tire hardness: SU S529-XL-A uses 97-A (harder, longer-lasting polyurethane). SU S529-A uses 95-A (softer, better grip). Dimensions and bolt patterns are identical. Choose -XL-A for high-speed or smooth-floor operations. Choose regular -A for rough terrain or if grip is critical.
Q: Can I replace SU S529-A wheels with SU S529-XL-A on a truck already using SU S529-A?
A: Yes, physically they mount identically. However, replace all four wheels on the truck (two load wheels and two steer wheels if applicable) at the same time with the same hardness rating. Mixing hardness causes unequal wear and steering/braking imbalance. If your truck currently has SU S529-A and you want longer life, order a complete set of SU S529-XL-A assemblies.
Q: Are the bearings in SU S529-XL-A sealed and maintenance-free?
A: Yes. SU S529-XL-A bearings are sealed cartridge bearings and do not require greasing. Inspect quarterly for lateral play by grabbing the wheel and attempting side-to-side movement. If the wheel rocks excessively or produces grinding noise, bearings have failed and the assembly must be replaced. Do not attempt to repack sealed bearings.
Q: How do I install SU S529-XL-A on a truck currently using loose wheels?
A: Lift the truck to full height. Remove the cotter pin, bolt, and old wheel from the axle. Slide the SU S529-XL-A assembly onto the axle (the hub bore should be 2.047 inches diameter). Ensure the hub seats fully against the carriage. Reinstall the bolt and cotter pin. Do not over-tighten; tighten until snug, then verify free wheel rotation. Test the truck under light load before normal operation.
Q: What warranty or lifespan can I expect from SU S529-XL-A?
A: SU S529-XL-A is typically covered by a one-year manufacturer warranty against defects in materials and workmanship. Actual service life is 2 to 4 years depending on duty cycle, floor conditions, and load patterns. On smooth, clean concrete with light-to-medium loads, life can exceed 4 years. Inspect wheels regularly and plan replacement when diameter falls below 3.0 inches or visible cracking appears.
Q: Does SU S529-XL-A provide better load-carrying capacity than the wheel-only SU S529-XL?
A: No. The load-carrying capacity is determined by the truck design and total weight rating, not by whether you use the assembly or the wheel alone. SU S529-XL-A and SU S529-XL have identical load ratings. The assembly is convenient because bearings and hub are pre-installed. If you need maximum load capacity, verify the truck rated capacity on the nameplate.