Different radius tires on truck
Getting ready to roll this afternoon, doing my last check of tire pressure I notice a screw in the tread of one of my tires. Off to the local garage and get a plug put in. Back home, hook up and final...
Forum Discussion
It's the tire diameter that matters. A 20" rim can have the same diameter as an 18" because the height of the sidewall is different. For example my stock size is 285/60r20 and my spare is 285/70r18. They are within 0.3" difference and are fine to use at the same time for a spare. Most trucks with 20" stock rims will have an 18" spare.
