Put this cover on my Jeep's spare tire which is just under 31 inches in diameter. I took the advice of other reviewers and went for the next larger cap with a smaller diameter 28-29.75. As you can see from the photos it is very close to the body. It wasn't that difficult, but it took some effort. Setting it up in the sun also helped to keep the material warmer. The seat belt seems to work well and seems to hold the lid down at highway speeds. The previous cover, bought without a strap, fell off and disappeared on the first trip down the freeway. I was concerned about the strap as it would be too noticeable. While this is the case, the belt is on the underside of the passenger side spare tire as shown in the third image. Overall I am very happy with the look and fit of this case. I'll try to give an update on the durability of the coating later.
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