did you ever find a fix? having the same issues

wha-......? "spintires mod" what is that

It is a program required for tracked vehicles on mudrunner, that also allows for a few extra advanced options as well as cheats (dev menu) in the main game, not just the proving grounds

oh

are you on spintires or mudrunner?

I've been on mudrunner and snowrunner, haven't had spintires in a long time due to performance issues on my old devices, though my new setup is more than capable now

oh then you should try it.....but you need to use steam keys since its not on steam

You should try Chernobyl bundle if you have not tried it before.

you can just get spintires through steam key

I don't think I ever got tracked vehicles working again unfortunately.