I weighed the rims with the run flats and the total weight diff was 75lbs going to the apex with non run flats. I see with a quick search the fronts are around 30lbs and the rears are just over 32lbs....so probably closer to 50lbs if not changing from runflats.
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335i FBO,Meth,JB4,Sutphin flash,LSD,GCLites 11.25@127.4 on NT05R
335xi FBO,Meth,JB4,Sutphin flash,VTT stage1 11.38 1/4 - 7.30 1/8th - 3.35 0 to 60 @ 0C
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