Product Description
SU 9144-XL is a polyurethane load wheel with a 5 inch outside diameter, 4.12 inch tread width, and 2.44 inch bore, engineered for electric lift truck applications and compatible with Superior brand pallet jacks. Manufactured with a 97A hardness compound, steel hub, and XL3 bonding. Supplied with shoulder bearings for standard mounting.
Specifications: 3.250 inch diameter x 4.500 inch width (3.250" x 4.500" | 3.25 x 4.5 wheel | 3-1/4 x 4-1/2 | 82.55mm x 114.30mm)
Specifications
Material & Construction
| Tread Material | High-performance polyurethane compound |
| Hub Material | Steel |
| Bonding Technology | XL3™ polyurethane-to-steel bonding |
Part Numbers
| Manufacturer Part Number | SU 9144-XL |
| OEM Part Number | SU 9144-XL |
Performance
| Duty Cycle Rating | Heavy-duty for electric pallet trucks |
Wheel Dimensions
| Material | Cushothane XL |
| Outside Diameter | 3.25 |
| Inside Diameter | 1.938 |
| Width Side to Side | 4.5 |
| Bore Depth | 0.512 |
| Hub Width | 4.5 |
| Bore Outside Diameter | 2.1649 |
Frequently Asked Questions
Q: What is the XL designation and how does SU 9144-XL differ from SU 9144?
A: SU 9144-XL is engineered for heavy-duty electric pallet trucks and lift trucks with extreme load cycles. It features a 97A hardness compound (versus 95A on standard SU 9144), a steel hub (versus polypropylene), and XL3 bonding technology for superior tread durability. Use SU 9144-XL for high-volume material handling. Use SU 9144 for standard warehouse duty.
Q: What is the load capacity of SU 9144-XL and is it higher than the standard wheel?
A: SU 9144-XL maintains the same 250 lb rated load capacity per wheel as SU 9144. The higher 97A durometer does not increase load capacity. It extends tread lifespan and reduces wear rate. Choose SU 9144-XL when you operate trucks at maximum load continuously. The 97A compound resists tread chunking and delamination under sustained stress.
Q: How do I know if my lift truck axle can accommodate SU 9144-XL?
A: Verify three specifications: (1) Bore ID must be 2.44 inches, (2) Bore depth must accommodate the 97A compound tread width of 4.12 inches, (3) Hub width must match your axle spacing. SU 9144-XL has a steel hub that weighs more than standard plastic hubs. Confirm your axle bearings are rated for the additional weight. Check your truck manual or contact Superior for compatibility.
Q: How much longer does SU 9144-XL last compared to SU 9144 in hours of operation?
A: SU 9144-XL typically extends wheel lifespan by 30-50 percent under heavy-duty cycles (3000+ hours per year). Standard SU 9144 lasts 2-3 years under heavy use. SU 9144-XL lasts 3-4 years. Actual lifespan depends on floor conditions, load consistency, and operator technique. Track tread thickness monthly to predict replacement timing.
Q: Can I use SU 9144-XL on a truck that currently has standard SU 9144 wheels?
A: Yes. SU 9144-XL uses the same basic dimensions and bolt pattern as SU 9144. You can retrofit a truck with SU 9144-XL wheels. However, replace all four wheels at once to maintain even load distribution. Mixing wheel compounds will cause uneven wear and steering issues.
Q: Does SU 9144-XL require different bearing types or installation procedures?
A: SU 9144-XL comes pre-assembled with shoulder bearings suitable for the heavier steel hub. Installation is identical to standard wheels: lower the truck, secure with jack stands, remove old wheel bolts, install SU 9144-XL, and torque bolts to 40-50 ft-lbs. Do not attempt to transfer bearings from a standard wheel to SU 9144-XL. The bearing sizes may differ due to the steel hub design.
