The same tires as rod_b listed, work for us here in the Kansas area. I also like to use Losi lowprofile yellow compound slicks.
heres how I have mine set up:
Losi 7702Y low profile slicks-Yokomo medium inserts-Ofna split spoke wheels
Yokomo 139G2-Yokomo firm inserts-Ofna split spoke wheels
Sorex 28r- Sorex type-B inserts-SpeedTechRC dish wheels
-I use the same inserts front and rear on all my sets-