View Single Post
  #2  
Old 08-30-2012, 08:17 PM
BBC71Nova BBC71Nova is offline
Senior Member
 
Join Date: Jun 2007
Location: Birmingham, AL
Posts: 849
Thanks: 0
Thanked 4 Times in 4 Posts
Default

Quote:
Originally Posted by FETorino View Post
I'm not sure I follow your logic here. If 5" bs is fine but it could be 1/8" more inboard then you want 5.125" bs. If you go from a 10 to an 11" width the BS doesn't change you still have only the 5.125" to work with inboard. The question is with the 10" wheel did you have the extra .875" outboard to allow for the wider width wheel? You didn't say but from your measurements I would guarantee that the wheel is hitting the tubs cuz you have .5" to much BS.
Sorry if it is confusing. I should have mentioned the tire differences. The current tires I have are 325/50-15 at 13.1" wide. Even with the wider 11" wheel the new wheel/tire combo will be narrower at ~12.5". To maintain the same relative tire/wheel positioning in the wheel tub you just take the extra inch and apply it evenly to both sides of the centerline. So that would be 5.5" BS. Then the extra .125" makes is 5.625.

As it stands now I have about 1.5-2" clearance between this wheel and the inner wheel tub. The problem is the wheel is too far outboard and thus the tire will be into the outer wheelhouse. The 1/2" extra BS would center it up. So I need ~6.125" backspace I guess.
__________________
John
'71 Nova (Build thread)
FFR Roadster
Reply With Quote