I only experience sliding when I go full throttle.
my spec's (now):
-Motor: Brushed 17t (going to switch to 27T Silver Can in a few months for the next race season ...so all my issues may go away w/ a slower motor).
-Shocks: aluminum upgraded, soft springs all the way around, heavy weight oil all the way around
-wheelbase is the short, I think that's 210mm
-tires are the HPI "M" road slicks, ...I am thinking of going to "S" as they supposedly have better grip which i'll want for race season (we race on asphalt)
..alighment is straight ...tuned via my radio controller.