I have an 85 c10. I went from a 30x12.50 to a 28x10.50 tire and also a different offset wheel. I am going to do a spring under set up to lower the rear of my truck another 4-5 inches. These are the traction bars i have now:





Will these still work with a spring under set up?
IF not, Whats should a use?

 

Caltracs!!!! The best there is!!!!

 

Looks like you've got the **** tightened out of those clamps And it's got the springs pulled all kind of directions... That can't be helping.

- I'd call Calvert and explain to them what you're doing and try to give them as much info as possible. I'd be looking into a set of cal-trac bars and a set of their split mono-leaf springs