i bought some racing slick tamiya tyres but they did'nt last long at all we used em outside, when they were used on carpet at the club they were nearly bold, and just did'nt grip.
a guy there said if racing on carpet use certain wheels for carpet and others for road, this is apparently because of all the crap and oils on the road surface sticks to the tyres and makes them useless indoors. so maybe if i got more tyres and just used them indoors they'd handle better? as far as i can see directional tyres handle much better on carpet, my brother got some and they seem to be pretty good!
also were just using the standard kit suspension, so we'll defo invest in some oil shocks!