I'm pretty sure the wheels are the exact same ones that are on the M3 Comp. so whatever those are...
Edit: Ok, according to http://felgenkatalog.auto-treff.com/
9x19 *vorne (Front) 245/35R19
ET 31, 11.90kg (26.23 lb)
10x19 *hinten (Rear) 265/35R19
ET 25, 11.20 kg (24.69 lb)
(I don't quite get how the rears weigh LESS than the fronts though