SU 258-XL

Frequently Asked Questions

Q: What are the exact specifications of the SU 258-XL load wheel?
A: The SU 258-XL has a 5 inch outside diameter, 4.12 inch tread width, 2.44 inch inside diameter hub bore, shoulder bearings, polyurethane industrial tread, and a machined steel core hub. These specifications make it compatible with a wide range of electric pallet trucks and walkie reach trucks with standard 2.44 inch axle sizes.

Q: How do I verify that the SU 258-XL will fit my electric pallet truck?
A: Measure three dimensions on your existing wheel: outside diameter should be 5 inch, hub bore should be 2.44 inch, and tread width should be between 3.8 and 4.25 inch. If your truck uses a quick-change system, confirm the interface matches the SU 258-XL mounting style. When in doubt, provide your truck model number to verify compatibility before purchase.

Q: What is the load capacity of the SU 258-XL for a four-wheel electric truck?
A: Each SU 258-XL wheel is rated for 5000 pounds in standard warehouse duty. A four-wheel truck using SU 258-XL wheels can safely handle approximately 18000 to 20000 pounds total depending on the truck frame and motor capacity. Exceeding the rated load per wheel causes tread cracking and bearing failure.

Q: Are shoulder bearings on the SU 258-XL rebuildable or do I need to replace the entire wheel?
A: Shoulder bearings are sealed and pressed into the hub. They are not field-rebuildable. If bearings fail or make grinding noise, the wheel assembly must be replaced. Attempting to rebuild or repack shoulder bearings in the field typically results in bearing misalignment and accelerated failure.

Q: What is the typical service life of the SU 258-XL wheel tread under normal warehouse conditions?
A: Under normal indoor warehouse duty with smooth concrete floors and loads within the rated capacity, the SU 258-XL tread lasts 18 to 24 months before reaching minimum wear depth of 0.125 inch. Service life depends on floor surface, load profile, and driver operating practices. Rough floors and overloading reduce tread life by 30 to 50 percent.

Q: Does the polyurethane tread on the SU 258-XL require special cleaning or maintenance?
A: Clean the SU 258-XL tread monthly with a damp cloth to remove dust and debris buildup. Do not use solvents or harsh chemicals; they degrade polyurethane. If the tread becomes stiff or brittle, it indicates UV or thermal damage and the wheel should be replaced. Avoid parking trucks in direct sunlight for extended periods.