Product Description
Load wheel assembly engineered for Class 2 reach truck applications, featuring 5.00-inch outside diameter with 4.125-inch width and Cushothane XL polyurethane tread compound at 97A durometer. Aluminum HeatSink hub design with thermal dissipation fins reduces operating temperature by 10 percent. XL3 bonding technology provides no-separation guarantee between polyurethane tread and hub interface. Pre-pressed bearing configurations available for greaseable and non-greaseable maintenance requirement
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
Construction
| Bearing Configuration | Pre-pressed bearings, available in greaseable (Z-shield) or non-greaseable (2RS sealed) configurations |
Material
| Durometer Hardness | 97A Shore hardness |
| Bonding Technology | XL3 bonding system with no-separation guarantee |
Part Numbers
| Manufacturer Part Number | SU S9157-XL-A |
| Base Item Family Designation | S9157 series |
| Cross-Reference Part Numbers | Superior L509157, Crown V509157, Generic Wheel GW9157-XL |
| Compatible OEM Equipment | Crown reach truck Class 2 applications |
Performance
| Duty Cycle Rating | Highest duty cycle tolerance for continuous operation |
Wheel Dimensions
| Material | Precision-machined steel hub |
| 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 makes the SU 9157-XL-A different from standard SU 9157 wheels?
A: The SU 9157-XL-A uses Cushothane XL polyurethane tread compound at 97A durometer, which is harder and more heat-resistant than standard 85A formulations. The Aluminum HeatSink hub design includes thermal dissipation fins that reduce operating temperature by 10 percent, extending bearing and tread life. XL3 bonding technology is a proprietary adhesive system guaranteeing no separation between tread and hub interface under normal operation. The aluminum hub is also 15 percent lighter than steel hubs, reducing overall truck weight.
Q: Is the SU 9157-XL-A compatible with the standard SU 9157-EZ-A?
A: No. Do not assume the SU 9157-XL-A and SU 9157-EZ-A are interchangeable. The XL variant uses an aluminum hub instead of steel and has different bearing pre-load specifications optimized for the harder 97A durometer tread. Mixing hub types on the same truck can cause uneven load distribution and accelerated wear on the softer-compound wheels. If you are converting a wheel set, replace all wheels with the same specification, either all standard or all XL models.
Q: What is the load rating for the SU 9157-XL-A?
A: The SU 9157-XL-A is rated for 1250 pounds per wheel under Class 2 reach truck operation. The harder 97A durometer tread can support 100 pounds per wheel additional load compared to standard 85A compounds. However, this wheel is still limited to smooth, indoor, level floor operation. Do not use on rough or outdoor surfaces. Total truck capacity is the per-wheel rating multiplied by the number of load wheels on your truck.
Q: How does the Aluminum HeatSink hub reduce operating temperature?
A: The Aluminum HeatSink hub has radial fins cast into the aluminum sidewalls. These fins increase surface area for heat dissipation to surrounding air, reducing bearing temperature by approximately 10 percent during sustained operation. Lower bearing temperature extends sealed bearing service life and reduces tread softening, particularly on long-duty reach truck routes. The aluminum material itself has twice the thermal conductivity of steel, accelerating heat transfer away from bearing surfaces.
Q: Are greaseable and sealed bearing options available for the SU 9157-XL-A?
A: Yes. The SU 9157-XL-A is offered in both sealed non-greaseable and greaseable maintenance configurations. Both use the same Aluminum HeatSink hub design and 97A durometer tread. Greaseable versions include a lubrication fitting for multi-purpose lithium grease application every 250 operating hours. Sealed versions are pre-lubricated and require no maintenance but cannot be disassembled. Verify which configuration you received before attempting to lubricate.
Q: What is the XL3 bonding technology guarantee?
A: XL3 is a proprietary three-part adhesive system applied at the tread-to-hub interface. It guarantees no tread separation from the hub under normal Class 2 operation for the service life of the wheel, typically 2-3 years depending on usage hours. If tread separates while the wheel is within design load and duty cycle, the wheel will be replaced at no cost. Separation resulting from overloading, rough surface operation, or abuse is not covered by the guarantee.