CO2 Dragster Competition

[BenTheTacoMan]

Hi everyone! I'm currently beginning work for a CO2 dragster competition, and I was looking for some advice. I'm not looking for a perfect solution for the entire design, but if anyone has any wisdom it would be greatly appreciated. What I do want to ask though, is if anyone had any pointers/tips on the best PLASTIC material for wheels. It races on a standard metal track, and I've heard many times the wheels is the most important part of the dragster. Does anyone have any ideas about wheel designs that are most efficient in terms of carrying a mass across a slick metal track? Thanks!