What size tires for drage racing?

[3x440ex]

What size is the best tire to run for drag racing with stock gearing? I have 18" and 20".......I know the 18's would probably be better if i had a week motor but my motor is strong and i think it will rev just as fast with 20's

[nakomis0]

IMO, change your gearing to 15/36. Run 20" for grass, dirt, ect.. And run 18" on 8" rims in the sand.