Product Description
Rubber Press-On
Specifications: 21.000 inch diameter x 7.000 inch width (21.000" x 7.000" | 21 x 7 wheel | 21 x 7-0 | 533.40mm x 177.80mm)
Specifications
Wheel Specifications
| Outside Diameter (in) | 21.000 |
| Width (in) | 7.000 |
| Outside Diameter (mm) | 533.40 |
| Width (mm) | 177.80 |
| Drive Tire Profile | Smooth Flat |
| Material | Rubber |
Frequently Asked Questions
Q: What is the wheel diameter and width for the SU 21X7X15-SF-R?
A: The SU 21X7X15-SF-R is a 21.000 inch diameter rubber press-on wheel with a 7.000 inch width, which converts to 533.40mm diameter x 177.80mm width. This size is common on mid-range electric lift trucks and pallet jacks.
Q: Is the SU 21X7X15-SF-R compatible with my electric lift truck currently using a 21 x 7-0 wheel?
A: Yes, the SU 21X7X15-SF-R is the exact equivalent. The designation 21 x 7-0 refers to the same 21.000 inch diameter by 7.000 inch width specification. Verify your mounting hub bore and axle shaft diameter match standard specifications before installation.
Q: Can I upgrade from a 21 x 7 wheel to a 21 x 8 or 21 x 9 wheel on my truck?
A: No, do not interchange different widths without verifying your axle width and hub spacing. A 21 x 7 wheel cannot be replaced with a 21 x 8 or 21 x 9 without checking clearance against the truck frame and load carriage. Contact your equipment manual or supplier to confirm your truck supports the wider wheel width.
Q: How do I know if the SU 21X7X15-SF-R rubber press-on wheel needs replacement?
A: Replace the wheel when you observe flat spots, cracks, chunks missing from the rubber, visible wear down to the tire profile base, or persistent steering pull. If the truck pulls left or right even after wheel truing, or if you see daylight between the press-on rubber and the core, the wheel has failed and must be replaced.
Q: What is the maximum load capacity for the SU 21X7X15-SF-R wheel?
A: The SU 21X7X15-SF-R is rated for electric lift truck duty on smooth floors with standard 5,000 to 6,000 pound load centers. Total load capacity depends on truck model, number of drive wheels, and floor conditions. Refer to your truck nameplate for actual capacity limits.
Q: How often should the SU 21X7X15-SF-R wheels be maintained?
A: Inspect wheels visually every 40 hours of operation for cracks, foreign objects, or rubber deterioration. Check wheel trueness monthly by spinning freely and watching for runout. Clean wheels weekly to prevent dirt buildup that can accelerate rubber wear. Replace when rubber thickness falls below 0.25 inches or visible damage appears.