I bought 2 brand new BFG MT 35x12.5x18 and 2 slightly used ones on ebay. but they look more than slightly used to me and my new ones havent came in yet. So can someone convert 21/32ths into laymans terms? I got that measurement off BFG website. I measured the tires and they arent a half inch! Somebody help me out!

 

21/32s is just over 5/8 in. If what you have is 1/2 in (4/8 or 16/32) , then the old tires are worn about 20%.