Product Description
8 x 4 Wheel, EZ Compound Assembly
Specifications: 8.000 inch diameter x 4.000 inch width (8.000" x 4.000" | 8 x 4 wheel | 8 x 4 | 203.20mm x 101.60mm)
Specifications
Wheel Dimensions
| Outside Diameter | 8 |
| Inside Diameter | 2.25 |
| Width Side to Side | 4 |
| Bore Depth | 0.63 |
| Bore Outside Diameter | 2.4404 |
Frequently Asked Questions
Q: What is the difference between SU S684 EZ-A and the standard SU S684 EZ?
A: The SU S684 EZ-A uses an EZ Compound rubber formulation instead of standard 85A mold-on. EZ Compound offers superior wear resistance and extends wheel life by 30-40 percent in high-traffic applications. Both wheels are 8x4 with identical bore dimensions (2.25 inch ID, 2.4404 inch OD, 0.63 inch bore depth). EZ Compound costs more but performs better in heavy-use environments.
Q: Is the SU S684 EZ-A assembly compatible with existing 8x4 caster forks?
A: Yes. The SU S684 EZ-A maintains the same 8 inch diameter and 4 inch width as all other SU S684 variants. It will bolt directly onto any caster fork designed for 8x4 wheels. The 2.25 inch bore ID and 2.4404 inch OD axle interface are standard. No modifications to the truck or caster body are needed.
Q: Why would I choose the EZ Compound assembly over a standard wheel?
A: Choose EZ Compound if your truck operates in high-volume picking, heavy traffic zones, or on abrasive floors where a standard wheel wears out in 12-18 months. The EZ formulation resists chunking and flat-spotting longer. If your truck runs 40+ hours per week or operates on outdoor or unfinished concrete, EZ Compound extends the service interval and reduces downtime from wheel changes.
Q: How do I identify if an existing wheel is the EZ Compound variant?
A: Look at the wheel sidewall or check the original invoice for the SKU. If it reads SU S684 EZ-A or contains EZ Compound in the product name, it is the EZ variant. Visual inspection is unreliable; the rubber color and texture can appear similar to untrained eyes. Always verify the part number before ordering replacement wheels.
Q: What is the typical lifespan of an SU S684 EZ-A wheel?
A: Under normal warehouse use (20-30 hours per week on smooth concrete), expect 24-36 months. Under heavy use (40+ hours per week on textured or outdoor surfaces), expect 18-24 months. Lifespan is affected by load, floor texture, ambient temperature, and maintenance. Wheels run on debris-filled or poorly maintained floors fail faster. Regular cleaning and bearing lubrication extend life by 10-15 percent.