Product Description
8.5 X 4 X 4 Soft Rubber Tire
Specifications: 8.500 inch diameter x 4.000 inch width (8.500" x 4.000" | 8.5 x 4 wheel | 8-1/2 x 4 | 215.90mm x 101.60mm)
Specifications
Wheel Specifications
| Outside Diameter (in) | 8.500 |
| Width (in) | 4.000 |
| Outside Diameter (mm) | 215.90 |
| Width (mm) | 101.60 |
| Drive Tire Profile | Smooth Flat |
| Material | Rubber |
Frequently Asked Questions
Q: What does the SF-R designation mean and how is this tire different from other 8.5 x 4 options?
A: SF-R stands for smooth flat tread profile in soft rubber material. This is a molded solid rubber tire without a steel band. The R designation indicates a standard rubber compound suitable for indoor hand trucks and pallet jacks. It differs from polyurethane press-on tires by being lighter, less expensive, and easier to replace, but offering shorter lifespan on high-traffic floors.
Q: Can I replace an 8.5 x 4 rubber tire with the SU 8.5 X 4 X 4-SF-P press-on alternative?
A: No. The wheel mounting system must match. If your wheel has a rubber tire bonded directly with no steel band, it is not compatible with a press-on tire. Press-on tires require cast iron hubs with a bore sized for the steel band. Confirm your hub type by inspecting the existing tire. If unsure, contact the wheel manufacturer or the equipment OEM with your serial number.
Q: What are the exact dimensions and what will this tire fit?
A: Outside diameter: 8.500 inches (215.90mm). Width: 4.000 inches (101.60mm). Smooth flat tread. This size fits most hand pallet jacks and manual lift trucks from the 1980s forward. Common brands include Wesco, Vestil, Omega, and many generic brands. Verify the hub bore matches your existing wheel. If the old tire is worn or damaged, take it to a local wheel shop for ID and fitment confirmation.
Q: How do I diagnose if this tire is worn out or damaged?
A: Inspect for flat spots, cracks radiating from the center, chunks missing, or wire showing through. Roll the jack by hand and listen for noise or feel for vibration. If the tire is hard and does not compress under finger pressure, the rubber is overly aged or degraded. If the jack pulls to one side, check for lopsided wear. Tread depth below 1/8 inch reduces traction significantly, especially on ramps.
Q: What is the load capacity and what are the usage limits?
A: Load capacity depends on the jack frame and number of drive wheels. Most two-wheel hand jacks with this tire size handle 2500 to 4000 lbs. Four-wheel units may handle up to 6000 lbs. Maximum speed: 4 mph on level smooth floors. On ramps: 2 mph or less. Do not use outdoors. Do not exceed tire temperature 140 degrees F. Soft rubber loses grip above 120 degrees F.
Q: How long do these rubber tires last and what maintenance is required?
A: Expected lifespan is 2 to 4 years with normal indoor use. Heavy use or outdoor storage shortens life to 1 to 2 years. Monthly inspection is recommended. Keep tires clean and dry. Wipe with a soft cloth to remove dust and oil. Store the jack indoors and cover if long-term storage. Do not leave tires exposed to direct sunlight or heat above 120 degrees F as rubber degrades faster. Replace tires together to maintain balance.