scale 4 me: you have good advice, but he doesn't have a RC10 GT... He has a Yokomo GT4.

As for JPmotdyn... i think that your clutch springs might be too strong, and that the clutch needs to have a lot of rpm's to get going. If this is the case, take off your engine, remove the clutchbell, and clutch shoes and a. get new clutch springs or b. shave some material off the clutch shoe (only about 1mm at a time) remove the material and replace. You can always take away the material, but you can't add some more on.
As for the tires, i use HPI treaded tires because i run on dusty concrete and the treads kick out dust and rocks very well.
L8r,
Garrett

PS. I have been looking at buying one of these, do you like it except for this problem?