direction of the tire really doesn't have an effect on road noise unless they are backwards OR you just never noticed it being that the tires were in the back and you never heard them.
Why do you have two different tires?
__________________
Sponsored by: KAM Racing Sports, Falken Tires, Progress Technology, Brady's High Performance, Taggart Performance Engineering, Rotora Brakes
Autocross is: 90% driver, 5% car, & 5%
CRAZY MOJO!
Autocross Help Page