So for my first time ever I bought a new set of rims. My whole life I always just put same size tire back on the stock rim. Well some how I messed it up and I am having a hard time seeing how. I got a set of rears size 10-9 and then ordered a set of tires 20x10-9 and took them to a tire place to mount them and they told me the rim was a 10 and the tire was a 9 this dosnt make any sence to me. Am I missing something? And to make matters worse the tire they tried mounting they gashed the tire in the head area in 2 places and dented my brand we wheel. I am going back tomorrow as I did not notice the tire and rim untill I got home because I had a set of fronts done while I was there and was kind of pre occupied to look then. Needless to say I am very agrivated, got this bike about a month ago and havnt even ridden it yet. Just trying to get it set the way I want it.