KiuLoam's Tire Cover Size Guide:
Cover Size 14"" fits for tire diameter 60~69cm
Cover Size 15"" fits for tire diameter 70~75cm
Cover Size 16"" fits for tire diameter 76~79cm
Cover Size 17"" fits for tire diameter 80~83cm
How to calculate your tire diameter?
Step 1: Find Your Tire Parameter. It's written on your tire side
Step 2: Calculate Your Tire Diameter
If your tire is written with P215/60R16, A=215 B=60 C=16.
Tire diameter=A*B/500+C*2.54 =215*60/500+16*2.54 =66.44cm.You need to buy the 14"" cover.
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