The tyres also exert a decisive influence on the sporting characteristics. On request, 20'' light-alloy M Double-spoke 680 M wheels in Bicolour look are available with Michelin Pilot Super Sport tyres. The ultra high performance mixed tyres (front 245/40 R20, rear 275/35 R20) offer a distinct improvement in driving dynamics.
Standard equipment includes 19'' Michelin Primacy Runflat mixed tyres. The M light-alloy Double-spoke 622 M wheels (front 245/45 R19, rear 275/40 R19) transfer the performance potential of the BMW X4 M40i to the road almost without loss.