Try Sorex 24 rear and 28s in the front. I use the Sorex B insert for stock. Also Pit 24R in the rear and Pit 27R in the front will work good. I think the Pit 25s are no longer made. The new compunds are 20R,24R,27R,30R, in these I use Pit medium inserts. Try Speedtechrc.com. They have tire/insert/wheels combos for real cheap.