Product Description
Load Wheel Assembly
Frequently Asked Questions
Q: What is the main benefit of buying the SU S554-XL-A assembly instead of the wheel alone?
A: The SU S554-XL-A assembly includes the 8-inch extra-large wheel, bearings, seals, and spacers all pre-assembled and tested. You get a complete 4000-lb-capacity wheel ready to bolt on without sourcing separate bearing or seal components.
Q: Is the SU S554-XL-A assembly compatible with trucks that previously used 6-inch wheels?
A: No - the SU S554-XL-A is an 8-inch extra-large wheel assembly designed for heavier-duty trucks only. Installing it on a truck designed for 6-inch wheels will damage suspension, brakes, and frame components. Verify your truck model supports 8-inch wheels before ordering.
Q: How long does installation of the SU S554-XL-A assembly take?
A: Installation takes approximately 45 minutes for all four wheels if you have basic tools and jack stands. Remove old wheels, align new assembly on axle, insert bolts, and torque to specification. Bearing adjustment is not necessary because the assembly comes pre-adjusted.
Q: What is the warranty on the SU S554-XL-A assembly?
A: The SU S554-XL-A assembly typically carries a 1-year warranty against manufacturing defects in the bearing set and seals. Wear and tear from normal use is not covered. Bearing life expectancy is 3-4 years with proper maintenance and correct truck usage.
Q: Can I upgrade from SU S553-A assemblies to SU S554-XL-A assemblies on my truck?
A: Only if your truck frame and braking system are rated for 8-inch wheels and 4000-lb load capacity. Upgrading requires verification from the truck manufacturer. Improper upgrades cause suspension damage and safety hazards. Do not mix old and new assembly types.
Q: What tools and parts do I need to install all four SU S554-XL-A assemblies?
A: You need a socket set, torque wrench, four jack stands, and four SU S554-XL-A assemblies. You do not need a bearing press, seal puller, or spacer kit - everything is included in the assembly. Loctite is optional for bolt threads to prevent loosening.