SU S9166

Frequently Asked Questions

Q: What are the exact dimensions of SU S9166?
A: SU S9166 is a 3.5 x 2 inch polyurethane load wheel. The 3.5 inch measurement is the outside diameter, and 2 inches is the width. These dimensions are critical for fitment. Before ordering, measure your truck hub bore and existing wheel width to confirm compatibility. A wheel that does not fit the bore or width will not install correctly.

Q: Which bearing size does SU S9166 use?
A: SU S9166 is compatible with standard 6203-series ball bearings. Confirm this matches your truck hub before ordering. If your truck uses a different bearing size (6204 or 6205), SU S9166 will not mount properly. When replacing, always check the existing bearing number stamped on the bearing race to ensure compatibility.

Q: What does machined poly tread mean on SU S9166?
A: Machined poly tread means the polyurethane surface is precision-cut with grooves for traction and wear distribution. Machined tread provides better floor contact than mold-on tread and extends wheel life. The machined finish also reduces noise and improves truck handling on smooth warehouse floors. Shore A 95 hardness ensures durability on concrete.

Q: Can I use SU S9166 as a drive wheel or only as a load wheel?
A: SU S9166 is designed as a load wheel for electric lift trucks. Using it as a drive wheel will cause rapid wear and potential bearing failure due to torque stress. Install SU S9166 only in the load wheel position. Check your truck manual to identify load wheel locations. Drive and load wheels must never be substituted.

Q: How often should I replace SU S9166?
A: Service life varies based on load, floor type, and truck hours. Typical replacement interval is 24 to 48 months in standard warehouse use. Inspect quarterly. Replace when tread depth falls below 1/8 inch, visible spalling or gouges appear, or the wheel develops flat spots. Flat spots indicate overloading or parking the truck on one wheel for extended periods.