Product Description
Drive Tire, Smooth Crown, Xl
Specifications: 13.500 inch diameter x 5.500 inch width (13.500" x 5.500" | 13.5 x 5.5 wheel | 13-1/2 x 5-1/2 | 342.90mm x 139.70mm)
Specifications
Wheel Specifications
| Outside Diameter (in) | 13.500 |
| Width (in) | 5.500 |
| Outside Diameter (mm) | 342.90 |
| Width (mm) | 139.70 |
| Material | Cushothane XL 97A |
Frequently Asked Questions
Q: What is the difference between SC-XL and SF-CGRIP-R drive tire designations?
A: SC-XL (Smooth Crown XL) has a domed center profile and is made of Cushothane XL 97A, a harder polyurethane blend. SF-CGRIP-R (Smooth Flat with Center Groove Rubber) has a flat center with walnut shell inlays for added traction and is rubber-based. Use SC-XL for polished indoor floors where grip is less critical and durability is priority. Use SF-CGRIP-R for dock areas, outdoor, or wet floors where traction is essential. Both fit the same axle.
Q: Is the SU 13.5 X 5.5 X 8-SC-XL suitable for outdoor operation on concrete?
A: Marginally. Cushothane XL 97A maintains its hardness in sun and moderate temperatures better than standard polyurethane, but extended outdoor use will cause oxidation and surface cracking within 2–3 years. Outdoor concrete is abrasive and will accelerate wear. For frequent outdoor use, specify the rubber SF-CGRIP-R or request a reinforced outdoor wheel with additional filler material. Store the truck in shade when not in use to extend wheel life.
Q: What does the XL 97A hardness specification mean and when do I need it?
A: 97A is Shore A hardness, measured on a durometer. XL means extra-long life compound. A harder material (higher number) resists wear longer but provides less grip and a harsher ride. Use 97A XL on high-traffic routes indoors where the truck runs 50+ hours per week. Standard 95A polyurethane is softer and better for occasional use or areas requiring more traction. If your truck is used lightly (under 20 hours per week), standard compound is more cost-effective.
Q: How do I install the SC-XL smooth crown drive wheel?
A: Press the wheel straight onto the drive axle using a pneumatic press until the core seats fully against the axle flange. The smooth crown profile should point outward (toward the floor). Do not install it backwards or cocked; incorrect seating causes uneven wear and vibration. Once installed, rotate the wheel by hand to confirm it turns freely without binding. If there is drag or rough spots, the wheel is misaligned and must be removed and reinstalled.
Q: What is the expected lifespan of an SC-XL drive wheel with heavy daily use?
A: 3–5 years under typical conditions (40–50 hours per week on a polished floor). The XL compound extends life versus standard polyurethane, but heavy turning or high-acceleration use will reduce this to 2–3 years. Inspect the wheel quarterly for uneven wear patterns, flat spots, or hardening. If the surface becomes brittle or cracks, the wheel must be replaced. Monitor grip; loss of traction indicates wear and may signal imminent failure.
