Product Description
Smooth Flat Poly Drive Tire
Specifications: 10.000 inch diameter x 4.000 inch width (10.000" x 4.000" | 10 x 4 wheel | 10 x 4 | 254.00mm x 101.60mm)
Specifications
Wheel Specifications
| Outside Diameter (in) | 10.000 |
| Width (in) | 4.000 |
| Outside Diameter (mm) | 254.00 |
| Width (mm) | 101.60 |
| Drive Tire Profile | Smooth Flat |
| Material | Polyurethane |
Frequently Asked Questions
Q: How does the 10x4x6.25-SF-P differ from the 10x4.75x6.5 poly tires?
A: The SF-P is slightly narrower (4.000 inches versus 4.750 inches) and uses a different rim width (6.25 inches versus 6.5 inches). The smaller width reduces rolling resistance and improves maneuverability in tight aisles, making it preferred for narrow warehouse corridors. The tradeoff is lower load capacity per tire (approximately 600 to 700 pounds per tire versus 650 to 750 for the wider version) and less stability on uneven floors. Check your lift truck nameplate to confirm which size you need; the two sizes are not interchangeable because the rim widths do not match.
Q: Is the SF-P tire compatible with my existing lift truck that came with wider tires?
A: Not without wheel hub modification. The SF-P is designed for a 6.25 inch rim width; if your lift truck has 6.5 inch or 7 inch hubs, you cannot mount the SF-P tire without spacers or hub adapters. Installing the wrong width tire can cause binding, uneven wear, and steering issues. Check your current wheel hub bore spec by measuring the hub face or consulting the lift truck manual. If you need a narrower tire, source tires that match your exact hub width. Do not force a 6.25 width tire onto a wider hub.
Q: What is the Shore hardness of the SF-P polyurethane and how does it affect performance?
A: Standard polyurethane drive tires like the SF-P are typically 90 to 95 Shore A hardness, meaning they are relatively hard and provide fast steering response with minimal sidewall flex. This hardness optimizes speed and maneuverability in smooth warehouses but reduces shock absorption on rough or outdoor floors. Do not confuse Shore hardness with load capacity; harder does not mean stronger. The hardness is chosen for floor type: hard poly for indoor clean floors, softer poly like Cushothane EZ for rough or cold environments. The SF-P is optimized for smooth, clean warehouse use.
Q: How do I diagnose steering problems or tire failure in the SF-P?
A: If the lift truck pulls to one side, check all four tires for wear inequality; replace worn tires as a set to restore even response. If the steering feels spongy or delayed, the tires are likely compressed and have lost rebound stiffness; they need replacement. Look for visible cracking, flat spots, or chunks missing from the tread or sidewall, which are safety failures. If the tire makes a cracking sound during steering, internal cracks are present and the tire is at risk of sudden separation. Inspect every quarter; poly tires in heavy-use facilities should be replaced every 2 to 3 years as preventive maintenance, not waiting for failure.
Q: What is the proper installation procedure and pressing force for the SF-P on a 6.25 inch hub?
A: Park the lift truck on a flat surface with mast fully retracted and the load-bearing capacity at zero. Secure the wheel assembly in a 20-ton hydraulic shop press with the tire facing the upper platen. Remove the old tire by applying steady pressure (8 to 12 tons) until it slides off the rim bore; do not exceed 15 tons or the rim may crack. Clean the rim bore with a wire brush to remove debris and old rubber. Center the new SF-P tire on the bore and lower the press platen, applying even pressure until the tire is fully seated on the rim (you will feel a slight increase in resistance when the tire is fully home). Allow 24 hours before operating so the tire bonds fully to the rim.
