tire sizes
I"m new to racing and know really nothing about it. my son is racing he is 9 years old and has a older redline fight expert. My questions are:
what is with the skinny tires he has and all other kids his age seem to use there 20" 1 3/8? can I change to a thicker tire like 1.4 etc.? do they have to use the 1 3/8 tire? what is the difference between the skinny tires the younger kids seem to use and a thicker tire?