The BS required will vary by the width of the rim and the size of the tire.
I ran 15x7" with 4.25" BS while running 235/60/15's (26.1" tall) and that was tight with my front disc brakes.
I now run 17x7 with 4.625" BS while running 215/55/17's (26.3" tall) and have plenty of clearance.
|