Mextrani 15 inch Spare Tire Cover Wheel Covers for RV Camper Travel Boat Trailer All Cars Tire Diameter 27-29, White American Flag

How To Calculate Your Tire Diameter by formula?Tire Diameter=A*B/500+C*2.54Example as below:If your tire is written with 215/60R16,A=215 B=60 C=16.Tire Diameter=A*B/500+C*2.54 =215*60/500+16*2.54 =66.44cm <69cmYou need to buy a 14 inch cover. 14 INCH165/80R13 195/70R13 175/80R13 185/80R13 205/60R14 185/75R14 155/80R14 180/70R14 195/75R14 215/60R14 165/80R14 205/75R14215/50R15 225/50R15 195/60R15 205/55R15 190/65R15 205/60R15 185/75R15 215/65R15 225/60R15 235/60R15 205/70R15 195/75R15205/60R16  215/60R16215/55R17 15 INCH215/70R15 215/75R15 225/70R15 225/75R15 235/70R15 235/75R15 245/70R15 255/60R15215/65R16 215/70R16 215/75R16 225/65R16 235/60R16215/60R17 225/60R17 225/65R17 255/55R17 275/55R17225/55R18 225/60R18 295/45R1816 INCH225/85R15 235/75R15 245/75R15 255/70R15 255/75R15 265/75R15215/85R16 225/70R16 225/75R16 235/70R16 235/80R16 235/75R16 245/70R16 245/75R16 255/65R16 255/70R16 265/70R16215/75R17 225/75R17 235/65R17 235/70R17 245/65R17 245/70R17 255/60R17 255/65R17 265/65R17 275/55R17235/60R18 255/55R18 265/60R18235/55R19 255/55R19 255/50R20 265/50R2031/10.50R1517 INCH275/75R15235/80R16 235/85R16 255/75R16 265/75R16 275/70R16235/75R17 245/75R17 255/70R17 275/65R17 285/65R17255/65R18 285/60R18285/50R20275/45R21