Quote:
Originally Posted by Roffle Waffle
lets compare my rears vs stock vs hypothetical aftermarket 19s. My fronts are about the same total weight as stock because they're much wider, but the weight of the rears is what affects acceleration most.
18x9 volk te-37 =17.7LBS
20mm ltw spacer = .5LBS max
265/35/18 RE-11 tire = 28LBS
total = 46.2lbs
stock z4m 18s =25.88 lbs
stock size 265/40/18 re-11 tire= 31lbs
total = 56.88lbs (10.68lbs over mine)
average aftermarket wheel 19x9 =24LBS (OEM CSL =25.5lbs)
265/35/19 re-11 tire =29LBS
total = 53LBS (6.8lbs more than mine)
to me, thats significant rotational mass
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Solid info their tom........ ok...
my CSL is lighter than the stock 18" rim, Add in the studs and composite Kics nuts, The AP BBK which was considerably lighter that stock FR and Rear, i think my losses are a decent amount more.... still i notice no difference..... Rotational masses are bigger losses felt due to their nature.....
In all honesty??? i dont think we can Ever really start talking about weight loss benefits when we have 30lb of supercharger and cooling gear for the s/c up front..... Once we get into seat installs, now were talking, as were offsetting a good chunk of added weight...