Quick Slicks CB21 tires are designed specifically for 14.5 x 12mm F1-Style/Modified CB Design Wheels.
For a complete list of cars/wheels this tire will fit, please refer to the Quick Slicks Fitment Summary which is updated on a regular basis.
Multiple silicone compounds are available - this is the X-FIRM compound (part number: CB21XF).
Outer Diameter (O.D.): .768" (19.50mm)
Width (Contact Patch): .455" (11.55mm)