Product Description
Poly Mold-On Assembly
Frequently Asked Questions
Q: Is SU 9164-A the same as SU 9164?
A: No. SU 9164-A is a complete poly mold-on assembly that includes the wheel, hub, and pre-assembled bearings. SU 9164 is the wheel only. If your truck needs a full drive wheel unit with bearings already installed, order SU 9164-A. If you are replacing just the tread or have existing hubs and bearings, SU 9164 may be sufficient. Check your truck schematic before ordering.
Q: Can SU 9164-A be installed as a complete bolt-on replacement?
A: In most cases yes, but verify your truck supports hub removal. SU 9164-A includes the hub and sealed bearings, so you will remove the old assembly completely. If your truck has fixed hubs that do not come off, you cannot use this assembly. Check your maintenance manual for hub replacement procedures. If unsure, contact the truck manufacturer for compatibility.
Q: What bearings are pre-installed in SU 9164-A?
A: The search results and product data do not specify the exact bearing type or size for SU 9164-A. Contact the supplier or consult the technical documentation for bearing SKU, bore diameter, and preload spec. Knowing the bearing type is critical if you need to service or replace bearings later. Do not assume bearing compatibility with other wheels.
Q: If the bearing seals fail on SU 9164-A, can the assembly be repaired?
A: Repair is difficult because the tread is bonded to the hub. If a bearing fails, it is usually more cost-effective to replace the entire SU 9164-A assembly than to press off the tread, replace the bearing, and re-press the tread. The labor and equipment cost for partial repair often exceed the price of a new assembly.
Q: How do I know if SU 9164-A bearings are worn?
A: Listen for grinding or squealing noise when the truck is rolling without load. Lift the truck slightly and spin the wheel by hand. A worn bearing will have roughness or lag in rotation. Inspect for grease leakage around the bearing seals. If noise or grinding is present, replace the assembly. Continued operation with a failed bearing will damage the hub.