my cms all4 w/ sport suspension and sport package came with 225/45-18 pirelli p7 cinturato rf summer tires
knowing i would need some winter tires, i started my search early
i ended up with mini OEM 16" X 6.5" ET:46, R123 Alloy 5 Hole Circular Spoke Wheel (5x120) in Silver, and as they are mini oem rims, no centering rings are needed (sourced from ECS Tuning)
for tires, i went with 205/70R-16 Dunlop Grandtrek SJ purchased from Alex @ tirerack ($91 ea +$46 frt for the set + $196 for TPMS senders)
the 205/70-16 tire was the largest tire that fit with no rubbing, based on testing by mounting used tires at my friendly local independant tire store, a 205/75-16 fit except for minor rubbing at full lock in front
the stock tires are 25.9" OD and the winters are 27.3" OD
the speedo was reporting my speed 1.9 mph higher than actual with the summer tires and it is .6 mph lower than actual with the winters (GPS speed checked from 20 mph to 100 mph)
scott