Product Description
Superior SU S400-XL (SUS400-XL) is a 5-inch x 2.875-inch polyurethane wheel with lightweight hub, specified at 97A durometer, designed for electric lift truck drive and load wheel applications.
Specifications: 3.346 inch diameter x 4.331 inch width (3.346" x 4.331" | 3.35 x 4.33 wheel | 3.346 x 4.331 | 84.99mm x 110.01mm)
Specifications
Material
| Tread Hardness | 97A Shore durometer |
| Tread Construction | Polyurethane |
| Hub Material | Aluminum casting |
Part Numbers
| Manufacturer Part Number | SU S400-XL |
| OEM Part Number | SUS400-XL |
Wheel Dimensions
| Material | Cushothane XL |
| Outside Diameter | 3.346 |
| Inside Diameter | 1.938 |
| Width Side to Side | 4.331 |
| Bore Depth | 0.7875 |
| Hub Width | 4.331 |
| Bore Outside Diameter | 2.1648 |
Frequently Asked Questions
Q: What is the difference between the SU S400-XL and SU S400-XL-A?
A: The S400-XL and S400-XL-A are functionally equivalent 3.346 x 4.331 inch wheels with 97A durometer polyurethane and aluminum hubs. The part number suffix may indicate a manufacturing revision or supplier change. Both wheels are interchangeable on compatible lift trucks. Verify your truck documentation specifies either number; if so, either part will work as a replacement.
Q: What lifts trucks or equipment use the SU S400-XL wheel?
A: The SU S400-XL is specified for electric lift truck drive and load wheel applications. The 97A Shore durometer and 3.35 x 4.33 inch size are typical for mid-range walkie stackers and small pallet jacks. Confirm compatibility by matching your truck model, serial number, and existing wheel diameter and width against the truck parts manual. Do not assume all electric lift trucks use the same wheel size.
Q: Can the SU S400-XL be used as a replacement for other wheel part numbers?
A: The SU S400-XL may be cross-compatible with other 3.35 x 4.33 inch wheels from other manufacturers, but only if the bore diameter (1.938 inch ID and 2.1648 inch OD) matches your truck axle. Do not assume cross-compatibility without verification. Contact your truck manufacturer or supplier with your truck model and serial number to confirm equivalent part numbers before purchasing a substitution.
Q: What does 97A durometer mean for this wheel?
A: 97A Shore durometer means the polyurethane tread is hard and wear-resistant, designed to resist flat-spotting and rolling resistance on smooth surfaces. 97A is typical for drive wheels on forklifts and stackers. This hardness provides durability but offers less shock absorption than softer wheels; it is best suited for smooth, paved warehouse floors, not uneven outdoor terrain.
Q: How is the SU S400-XL installed and what torque specification should I use?
A: Lift the truck on jack stands. Remove the axle bolt and retainer. Slide the old wheel off. Slide the S400-XL onto the axle, ensuring the bore aligns with the axle pin holes. Reinstall the bolt and retainer. Torque the axle bolt to 25-35 ft-lb (check your truck manual for the exact spec; over-torquing can crack the hub or strip threads). Test spin the wheel; it should rotate freely with no lateral play.
Q: What is the expected service life of the SU S400-XL?
A: The SU S400-XL typically lasts 3-5 years on a drive wheel position and 2-3 years on a load wheel position under standard warehouse use (5+ hours daily). Service life depends on floor surface, load cycles, and maintenance. Inspect quarterly for flat-spotting, cracks, and bearing play. Replace if flat-spots exceed 0.25 inch, the wheel becomes noisy or difficult to spin, or the hub moves laterally on the axle.