Difference Between 930 / 911 Trailing Arm Offset
 

What is the difference between the 911 and 930 trailing arm in terms of required wheel backspacing? I think it's about 2", but I also know the 930 uses about a 1" spacer from the factory. So, I beleive the ultimate difference is about 3", but can someone confirm?

i just posted a question about spacers. looking at my brothers 930 and my 911 w/turbo body and 9x16's, it looks like the 930's track is 2 inches wider, 1 inch per side. my rims sit inside the fender about 2" and his sit inside about 1". we both have 1" spacers.

Cary from ERP states in this thread that the difference in offset on the turbo arm is 22mm, which is very close to 1 inch (25.4mm). I believe he would know the correct answer as well as anyone.

TT