Product Description
LOAD WHEEL, XL
Frequently Asked Questions
Q: What does the XL designation mean for SU S9122-XL?
A: SU S9122-XL is the heavy duty version of the S9122 wheel. It features reinforced hubs, heavier gauge steel, and upgraded bearings rated for continuous heavy loads and extended operating hours. XL does not mean larger diameter - it means higher load capacity and longer service life. Use this wheel only on trucks rated for heavy duty service. Standard S9122 on a heavy truck causes rapid failure.
Q: Is SU S9122-XL compatible with trucks designed for standard S9122?
A: Not always. You must verify your truck axle can support the heavier XL wheel. Check the truck load rating and duty cycle classification. Some trucks are designed for standard wheels only. Installing XL wheels on undersized trucks causes bearing overstress and axle strain leading to steering problems. Contact the truck manufacturer with your truck model and serial number to confirm XL compatibility before upgrading.
Q: What is the performance benefit of upgrading to SU S9122-XL?
A: SU S9122-XL provides longer service life (typically 2000 to 2500 operating hours versus 1500 to 2000 for standard), better performance under continuous heavy loading, and reduced maintenance downtime. Bearing failure is less likely in the first 1500 hours. For 24/7 operations or heavy warehouses, XL wheels reduce unexpected breakdowns. Light duty users do not need XL and should stick with standard S9122 to save cost.
Q: How do I know if my truck needs SU S9122-XL instead of standard S9122?
A: Check your truck nameplate for load rating and duty cycle. If rated above 2000 pounds, continuous duty rated, or operated more than 8 hours daily, use SU S9122-XL. If your current standard S9122 wheels fail frequently (less than 1000 hours), upgrade to XL. Light warehouse trucks (less than 2000 pounds, 8 hour shifts, clean indoor floors) use standard S9122. Do not over-specify - XL cost is not justified for light duty.
Q: Can I mix standard S9122 and S9122-XL wheels on the same truck?
A: No. Never mix standard and XL wheels. Mismatched wheels cause uneven wear, steering instability, and increased bearing stress on the heavier XL side. If you currently have mixed wheels, replace all four with matching SU S9122-XL units immediately. After replacement, verify the truck steers and handles normally. Uneven steering after wheel replacement indicates a fitment or bore diameter problem.