Moonet Spare Wheel Tire Cover For Jeep Liberty Wrangler Commander Compass Grand Cherokee Size M R15 235/65R17 255/65R16 215/70R16 235/75R15 245/70R15 235/65R17 255/65R16 (Diameter 28"-30");

Size: R15 （with Jeep logo）
Include: 1pc wheel tire cover

Specifications:

1)Material:Canvas
2)It is made of strong and washable material,the high quality materials and workmanship make it durable and easy to maintain.
3)Easy to install and remove and no tools required 4)Spare tire cover is an easy and practical way to protect your spare and add some style at the same time.
5)The cover helps guard against sun,rain,mud,and other elements,messes can be wiped or hosed off.
INSTALLTION TIP:

With the long-term exposed weathered, the ditry spare tire makes your car not enough beautiful. Besides, it is more easier to turn your spare tire aging. If we have the spare tire cover of all sorts of design, it not only can make your spare tire's life more durable, but also can make your love car more fashionable.
The arithmetic to know your tire of diameter:

For example,your tire is P235/65R17,A=235 B=65 C=17
Your tire diameter =A*B/500+C*2.54 =235*65/500+17*2.54 =73.73cm
SIZE S (R14) FIT FOR: diameter 60~69cm
SIZE M (R15) FIT FOR: diameter 70~75cm
SIZE L (R16) FIT FOR: diameter 76~79cm
SIZE XL (R17) FIT FOR: diameter 80~83cm
Than you need to buy the 15 inch one.