How to know the correct size cover (S, M, L, XL, XXL) for your Tire?
You can calculate the correct cover size based on the tire specifications,

For example, your tire is written: P225/40 ZR18,
A is 225, B is 40, C is 18,
The Calculation Results (CR): (A × B) / 1270 + C, it’s (225 × 40) / 1270 + 18, the result is 25.09,
So that an "S" size cover fits for your tire.

S: for CR 25~27.3,
M: for CR 27.4~29.3,
L: for CR 29.4~31.3,
XL: for CR 31.4~33.3,
XXL: for CR 33.4~35.0,

S size fit for:
195/55R16, 205/55R15, 205/55R16, 205/60R16,
205/65R15, 205/65R16, 205/70R15, 205/70R16,
205/75R14, 205/75R15, 215/50R15, 215/60R15,
215/60R16, 215/65R16, 215/70R15, 225/55R17,
225/65R15, 235/60R16,

M size fit for:
205/70R16, 215/70R16, 215/75R15, 215/75R16,
225/60R18, 225/65R17, 225/70R16, 225/75R15,
225/75R15, 235/55R18, 235/60R17, 235/65R16,
235/65R17, 235/70R15, 235/75R15, 245/70R15,
255/55R17, 255/70R15,

L size fit for:
215/85R16, 235/65R17, 235/70R16, 235/70R17,
235/75R16, 235/80R16, 235/75R15, 245/55R19,
245/60R18, 245/70R16, 245/75R15, 245/75R16,
255/70R16, 255/70R17, 255/75R15, 255/75R16,
265/50R20, 265/65R17, 265/70R15, 265/70R16,
265/75R15, 275/40R22, 275/45R21, 275/65R17,
275/70R15, 285/60R17, 30x9.5-15, 31x10.5-15,

XL size fit for:
235/85R16, 245/70R18, 245/75R17, 255/70R18,
255/75R17, 265/70R17, 265/70R18, 265/75R16,
275/55R20, 275/65R17, 275/65R18, 275/70R17,
285/60R18, 285/70R17, 285/75R16, 275/75R17,
305/65R17, 33x12.50R15LT,

XXL size fit for:
265/75R18, 285/75R17, 315/70R17, 33x12.50R16.5LT,

If your tire specifications are not listed, you can Calculate the correct tire cover size or write to us.

Manufacturer	Aolowewin
Brand	Aolowewin
Model	Spare Tire Cover
Package Dimensions	28 x 22.3 x 8.6 cm; 608 g
Item model number	AOLO-BK01
Manufacturer part number	AOLO-BK01
Item Weight	608 g

Black Spare Tire Cover, Lots of Size for Hummer H3, Jeep Cherokee Wrangler, Toyota SUVs, Fit Most of SUV, Trailer, RV, Truck, Weatherproof Protector (XL: 255/70R18, 255/75R17)

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