Product Description
Load Wheel
Specifications: 5.000 inch diameter x 4.120 inch width (5.000" x 4.120" | 5 x 4.12 wheel | 5 x 4-1/8 | 127.00mm x 104.65mm)
Specifications
Wheel Dimensions
| Material | |
| Outside Diameter | 5 |
| Inside Diameter | 2.125 |
| Width Side to Side | 4.12 |
| Tread Profile | 3/8 Radius |
| Bore Depth | 0.826 |
| Hub Width | |
| Bore Outside Diameter | 2.4406 |
Frequently Asked Questions
Q: What is the difference between the SU 9157-EZ and the SU 9157-EZ-A?
A: The SU 9157-EZ is a wheel-only component with a 5.000 inch diameter and 4.120 inch width, designed for retrofit into existing hub assemblies. The SU 9157-EZ-A is a complete load wheel assembly that includes the hub, bearings, and axle interface pre-assembled. Use SU 9157-EZ if you are replacing only the tread rubber on your existing hub. Use SU 9157-EZ-A for complete wheel assembly replacement. Both have identical bore specifications: 2.125 inch inside diameter, 2.4406 inch bore outside diameter.
Q: Is the SU 9157-EZ compatible with my three-position contact wheel configuration?
A: Yes. The SU 9157-EZ is engineered for reach trucks and side-load carriage applications that use three-position or four-position load wheel assemblies. The 4.120 inch width distributes load across a wider contact patch, reducing stress concentration. Verify your truck uses a 2.125 inch bore diameter wheel. If your truck has 2.0 inch, 2.375 inch, or 2.75 inch bore holes, you need a different wheel specification. Check your original equipment part number on the truck nameplate.
Q: Can I use the SU 9157-EZ on an outdoor pallet truck or rough floor application?
A: No. The SU 9157-EZ is rated only for indoor, smooth, level floors under Class 2 operation (limited travel distance, smooth surfaces). The 3/8 radius tread profile is not designed for outdoor rough surfaces, cracked concrete, or heavy shock loads. Outdoor and Class 4-6 rough handling requires a different wheel with deeper tread and higher durometer rating. Using this wheel on rough surfaces will cause rapid tread separation and hub damage.
Q: What cross-references or equivalent part numbers does the SU 9157-EZ have?
A: The SU 9157-EZ cross-references to Crown L509157, Yale YL-582031247, Hyster H509157, and Nissan N509157 on specifications. These are functionally equivalent when bore diameter 2.125 inch and bore outside diameter 2.4406 inch match your application. Always verify complete specifications before ordering. Some suppliers list the wheel as 5 x 4.12 load wheel or 127mm x 104.65mm diameter x width.
Q: How is the SU 9157-EZ lubricated and how often does it need maintenance?
A: The SU 9157-EZ is available in greaseable or sealed non-greaseable configurations. Greaseable versions require multi-purpose lithium grease application every 300 operating hours through the grease fitting on the hub. Sealed versions are pre-lubricated and require no maintenance but cannot be disassembled. Inspect the 3/8 radius tread every 3 months for wear patterns. If uneven wear is visible or tread depth falls below 1/8 inch, replace the wheel immediately.
Q: Why is my SU 9157-EZ wheel making noise and vibrating?
A: Noise and vibration indicate bearing play, tread separation, or wheel imbalance. First, spin the wheel by hand and listen for grinding or roughness, which signals bearing failure. Next, grab the wheel horizontally and check for lateral play exceeding 0.062 inch at the bearing surface, indicating worn bearings or loose hub. If the wheel feels solid, check for tread bulging or separation from the hub around the perimeter. If tread is separating, the wheel must be replaced. If bearings are loose, replace them. Do not operate with excess bearing play.