The stock size of the 300ex tires are 22 x 10-9 and the Maxxis Razr rear does not come in the same size Tire so would one of the other sizes work and what would be the difference

Thanks

 

get the 20-11-9. The 300ex doesnt really have a great top speed to begin with, so why not sacrifice a few mph for a lot more low end and acceleration. There is no way i would go back to 22 inch tires. Plus, wider is better.

 

20 inch tires will handle a lot better, but you will hit the rev limit a lot sooner, just put a 14 tooth sprocket on the front in place of the 13 tooth, and you'll be right back where you were. I got some Titan Fast Trekkers and my son loves them.