Originally Posted by killingtime

that is because it changes your roll-out. bigger tire = higher top speed.

I do have a couple question on tires though;

1 - Tamiya has codes for their tire compounds (A,B,S...) What are all the ratings and could someone rate them softest to hardest for me?

2 - What sites keep a good stock of tamiya tires and have a fair price?

Thanks for the help.