Product Description
Load Wheel Assembly
Specifications: 3.250 inch diameter x 6.010 inch width (3.250" x 6.010" | 3.25 x 6.01 wheel | 3-1/4 x 6.01 | 82.55mm x 152.65mm)
Specifications
Wheel Dimensions
| Material | Cushothane XL |
| Outside Diameter | 3.25 |
| Inside Diameter | 1.938 |
| Width Side to Side | 6.01 |
| Bore Depth | 0.584 |
| Hub Width | 6.01 |
| Bore Outside Diameter | 2.0467 |
| Tread Profile |
Frequently Asked Questions
Q: What does the -A designation mean on the SU 9812-A and how does it differ from SU 9812?
A: The SU 9812-A is the 48V assembly version of the load wheel. The SU 9812 is rated for 24V and 36V. The -A has the same 3.25 inch diameter and 6.01 inch width but is engineered for higher-voltage truck systems. The bearing and tread compound are optimized for 48V operating conditions. Do not interchange SU 9812 and SU 9812-A. Installing the non-A on a 48V truck voids warranty and causes bearing failure.
Q: Is the SU 9812-A a complete assembly or do I need to install a bearing and axle bolt?
A: The SU 9812-A is a complete load wheel assembly with the bearing pre-installed and sealed. The assembly does not include the axle bolt. Use the bolt and washer from your original wheel. Inspect the axle threads for damage and replace if corroded or stripped. Apply a small amount of threadlocker to the bolt to prevent loosening from vibration.
Q: What is the metric equivalent for the SU 9812-A wheel dimensions?
A: The SU 9812-A wheel is 82.55 mm diameter by 152.65 mm width. The bore is 49.28 mm (approximately 1.938 inch inside diameter). If you are sourcing parts from a metric-based supplier, use these conversions to verify fitment. Do not mix metric and US customary fasteners on the assembly.
Q: How often should the SU 9812-A wheel be inspected for wear and what are failure symptoms?
A: Inspect the SU 9812-A quarterly or every 500 truck operating hours. Look for tread cracks, rubber separation from the hub, bearing noise, or excessive runout. Symptoms of failure include grinding or squealing from the wheel, uneven steering response, or visible wobble during operation. Replace immediately if any symptom appears to avoid safety incidents.
Q: What is the bore outside diameter specification for the SU 9812-A and axle compatibility?
A: The SU 9812-A bore outside diameter is 2.0467 inch. This fits standard 48V electric pallet jack axles. Verify your axle diameter with a caliper before installation. If your axle is 1.25 inch or 1.5 inch OD, you need an adapter sleeve or a different wheel with matching bore size. Never force-fit a wheel onto a mismatched axle.