Has anyone went with a 20" tire on the back of their 700xx? I want to get a tire combo that slides better and helps stick the front end, but I am not crazy about paying so much for the Razr's that are out for the 11" rim. I can get a wheel/tire combo on the ITP 10" rim for roughly the same price, plus the tire options in the 20" are endless.

I think that's what size my paddles are. No need to drop it down a sprocket of you go with the 10" rim and 20" tires.