View Single Post
      09-15-2008, 05:51 PM   #4
Lieutenant General

swamp2's Avatar
Drives: E92 M3
Join Date: Sep 2006
Location: San Diego, CA USA

Posts: 10,201
iTrader: (1)

Originally Posted by BarryC View Post
Thanks Ben for the info! The wheels should weigh less than OEM and I'm looking into titanium fasteners to reduce weight at the rim (where it matters most).


  1. Titanium is substantially more dense than aluminum.
  2. Even at the same weight a larger wheel has a larger moment of interia and hence behaves as if it weighs more.
  3. Wheel put together with bolts are generally weaker than 1 piece wheels.
  4. 20" will ride poor and perform worse than 18" or 19". They are for looks only. 19" is a good compromise between looks and performance. The 18" probably slightly outperform the 19".