Product Description
SU 124-A Load Wheel Assembly for electric lift trucks from Liftsplus.com. Constructed with high-grade polyurethane tread (97A durometer) on a machined steel hub, shoulder bearings pre-installed, and standard mounting configuration. Suitable for 5 inch OD x 4.12 inch tread width x 2.44 inch bore assemblies. Engineered for electric pallet trucks with premium abrasion resistance, precision bearing support, and OEM fitment compliance.
Specifications: 3.250 inch diameter x 2.750 inch width (3.250" x 2.750" | 3.25 x 2.75 wheel | 3-1/4 x 2-3/4 | 82.55mm x 69.85mm)
Specifications
Material & Construction
| Hub Material | Machined steel core with non-marking polyurethane tread |
Part Numbers
| Manufacturer Part Number | SU 124-A |
| OEM Part Number | SU124-A |
Wheel Dimensions
| Material | Cushothane |
| Outside Diameter | 3.25 |
| Inside Diameter | 1.9375 |
| Width Side to Side | 2.75 |
| Bore Depth | 0.822 |
| Hub Width | 2.75 |
| Bore Outside Diameter | 2.0475 |
Frequently Asked Questions
Q: What are the key differences between the SU 124-A and standard SU 124 load wheels?
A: The SU 124-A features a machined steel hub core with high-grade polyurethane tread (97A durometer) and pre-installed shoulder bearings, versus the standard SU 124 which uses a simpler Cushothane design. The SU 124-A delivers superior abrasion resistance, better load capacity, and longer wear life (36 to 48 months versus 24 months). The 97A durometer polyurethane is harder and more durable than Cushothane, making it ideal for high-volume picking operations. Both have identical mounting dimensions (3.25 inch OD, 2.75 inch width, 1.9375 inch bore), but the SU 124-A costs more and is recommended for trucks operating 8+ hours daily. Choose SU 124-A if your truck runs continuous shifts or on abrasive concrete floors.
Q: Is the SU 124-A compatible with older lift truck models that came with standard SU 124 wheels?
A: Yes, the SU 124-A is a direct bolt-on upgrade to the SU 124. The mounting bore diameter, hub width, and axle spacing are identical, so no modifications to the truck frame or axle are required. You can install the SU 124-A on any lift truck that originally shipped with the SU 124 or equivalent Cushothane load wheels. The pre-installed shoulder bearings mean the wheel is ready to mount immediately; do not add additional bearings or spacers. The only difference is the improved hub material and polyurethane tread compound. Cross-check your truck documentation to confirm the wheel is rated for 3.25-inch diameter wheels before ordering.
Q: What load capacity and pressure specifications should I follow for the SU 124-A?
A: The SU 124-A is rated for 200 to 300 pounds per wheel when installed as a load wheel, or 150 to 250 pounds per wheel as a steering wheel, depending on axle geometry. Total load per axle should not exceed 1,500 pounds. The wheel operates best at zero PSI or low pressure (the 97A durometer polyurethane is load-bearing without inflation). If your truck specifies pressurized operation, inflate to 20 to 40 PSI maximum; do not exceed 60 PSI as this may damage the hub assembly. The wheel is rated for maximum floor speeds of 5 mph when fully loaded. Do not exceed these limits or the polyurethane will compress, reducing grip and causing steering instability.
Q: How do I install the SU 124-A and what tools are required?
A: Installation is straightforward and requires only standard hand tools: a socket wrench matching your hub bolt size (typically 12mm or 1/2 inch), a jack rated for the truck weight, and a clean cloth to wipe the hub bore. First, lift the truck and remove the old wheel using the socket wrench to loosen the hub bolts. Remove the old bearing and spacer if present. Clean the hub bore thoroughly with the cloth to remove dirt and grease. Slide the SU 124-A onto the axle stub and ensure the hub bore seats fully. Install hub bolts and torque to 50 to 70 foot-pounds in a cross pattern to ensure even seating. The wheel should spin freely with minimal side play after installation. Test by hand-rotating the wheel to confirm it does not bind.
Q: What maintenance schedule should I follow to maximize SU 124-A service life?
A: Perform monthly inspections: check the polyurethane tread for wear, cracks, or flat spots using a depth gauge (tread should be at least 2 millimeters). Inspect the steel hub for corrosion or bearing movement. Rotate the truck daily when parked to prevent compression set on a single wheel. Clean the wheel monthly with a damp cloth to remove dust and debris that can cause bearing contamination. Lubricate the hub bore with light machine oil or bearing grease every 6 months; do not over-lubricate as excess grease reduces rolling efficiency. Check hub bolts quarterly and re-torque if loose. The 97A durometer polyurethane is more durable than Cushothane and typically does not require replacement before 36 to 48 months of normal operation. Store spare wheels indoors to prevent UV degradation of the polyurethane tread compound.