Use the calculator for any valid metric radial size. Detailed size pages are published only when reliable reference information is available; we do not guess which tires fit a vehicle.
Tire size calculator
Calculate sidewall, diameter, circumference and revolutions from a metric size.
OPEN CALCULATOR →Compare two sizes
See geometry, diameter difference and calculated speedometer effect.
COMPARE SIZES →Read the sidewall
Understand width, aspect ratio, radial construction and rim diameter.
READ GUIDE →No fitment promise
Mathematical similarity is not approval. Confirm vehicle trim, rim width, wheel specifications, clearance, load capacity, speed rating and manufacturer requirements.