Brief summary considering this is my first post:
I've recently acquired a 2014 435i 6mt and am thoroughly enjoying it.
It is equipped with the M-Sport Package, M-Sport Brakes, M-Performace Power Kit, M-Perfomace Exhaust, wrapped in Black Sapphire Metallic and Corral Red interior.
I had no intentions on modding it for at least a year since it sits beautifully as-is but,...
I have already ordered new wheels, new tires, new down pipe, quad diffuser, quad exhaust tips, M-perfomace trunk spoiler (rep), and a Bimmertech amp; it hasn't even been a month since ownership lol
Anyway, since I had the car jacked up and both set of wheels off, I was curious to see how much each set weighed.
The stock m442 rear wheels (19 x 8.5) with Michelin Pilot Super Sport (255/35/19 @8/32 depth) weigh a staggering 54.7 lbs fully inflated!
The front wheels (19 x 8) with the stock Pirelli P-Zero run-flats (225/40/19 @6/32 depth) weigh 53.5 lbs fully inflated.
My new setup are Stance SF03's in brushed face silver.
The rears are 20 x 10.5 et 45 et45 with Michelin PSS 295/30/20 10/32 depth @ 40psi. The weight is 51.6 lbs for each rear tire and wheel combo. A savings of 3.1 lbs at the rear corners or a total of 6.2 lbs savings of unsprung mass for the rear.
A nice figure considering the new wheels/tires are larger in diameter and considerably bigger in terms of width.
The fronts are 20 x 9 et 35 with Michelin PSS 255/35/20 10/32 depth @ 40 psi. The weight is 50.4 lbs. The same savings of 3.1 lbs.
In summation, going to bigger 20 inch wheels (rotary forged/flow forged/etc.) saved me a total of 12.4 lbs of unsprung weight!
Attached are the pics of the wheels on a scale.
I might do a review of the new wheels in another post.