Theres a funny story to that........
I got the kit as a junk kit at a flea market, the thunderbolt was partially started missing glass front window frame crushed and of course one of the axles the wheel mount was broke off one sise and one of the wheel/ tires was m.i.a. so i originally built the truck with only 3 wheels as a "tripod"
another mcm member set me up with a new tractor tire, but they are apparently directional and i had the wrong way, had to use it tho so one tire is really slinging mud while the other tires are diggin in LOL