I want to run a 15x3 up front how much bs should I use on this. I want to run a 15x8 in the back with a 4inch bs that should be good. I want to fit a 235 or 245 in the back. Right now I have a 14x7 with 235's in the back with 195 up front. I one othere thing now is would my traction bars play a roll in the bs 

