TIRE SIZE CALCULATOR

This calculator was designed to help you choose a tire which best matches your factory originals. Please be sure to enter data in the appropriate units.

DATA
OE Tire Width (mm)		New Tire Width (mm)
OE Aspect Ratio		New Aspect Ration
OE Rim Diameter (in)		New Rim Diameter (in)
Sample Speed		Sample Travel Distance
OE Gear Ratio
RESULTS
OE Tire Diameter (in)		New Tire Diameter (in)
Tire Dia. Difference (%)		Difference Direction
Original Odometer Reading		New Odometer Reading
Original Speed Reading		New Speed Reading
Instrumentation Error (%)		Error Direction
Effective Gear Ratio