Quick Slicks CA37 tires are designed specifically for 1:32 Carrera Formula 1 (2015 - Present) stock (plastic) 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: CA37XF).
Outer Diameter (O.D.): .819" (20.80mm)
Width (Contact Patch): .476" (12.10mm)