I have a question for the guys who know.

[suicideneil]

On the traction issue, wider tires would help alot (re: F1 cars for example), and I doubt they would hurt the aerodynamics too much either, all things concidered. Only problem with that is finding something the same diameter as you have now & then some foams wide enough. 'Tis a tricky game making stuff go faster than it was designed to & remain controllable/ reliable....