On my house scale it weighed 48 lbs. Tire rack lists the Pirelli at 24 lbs. so if you take off the tire and a few oz for the TPMS it should be high 23's. The extra width in the rear should be about a pound more. Hope that helps. Darwin from sonic may have official info. That is where they were purchased from.
2013 E92 M3 DCT/LMB/Blk Nov/Competition/Premium/Cold Weather/EPS/BMW Apps/SAT Radio/Corsa Exhaust