Take a look at the wheel and tyre stats posted my Miniac in a sticky it gives all the MINI2 users tyre stats. Judging by the numbers on the tyre size you mention there cant be any problems
215/45-17 Avon Tech M5001215/45-17 BFGoodrich G-Force Sport1215/45-17 BFGoodrich g-Force T/A KDW-22215/45-17 Bridgestone Potenza RE050A1215/45-17 Bridgestone Potenza RE5401215/45-17 Bridgestone Potenza S-03 Pole Position1215/45-17 Continental ContiSportContact 21215/45-17 Cooper Zeon 2XS1215/45-17 Dunlop SP Sport 90002215/45-17 Dunlop SP Sport FM9011215/45-17 Falken GRB FK-4511215/45-17 Falken Ziex ZE-5121215/45-17 Falken Ziex ZE-9121215/45-17 Federal SS 5951215/45-17 Fuzion ZRi1215/45-17 General Exclaim UHP1215/45-17 Goodyear Eagle F1 GS-D319215/45-17 Hankook Ventus HRII H4051215/45-17 Kumho ECSTA MX4215/45-17 Kumho ECSTA SPT1215/45-17 Kumho ECSTA Supra 7121215/45-17 Michelin Pilot Exalto PE21215/45-17 Michelin Pilot Sport1215/45-17 Pirelli P70001215/45-17 Pirelli PZero Nero1215/45-17 Pirelli PZero Nero M+S3215/45-17 Sumitomo HTR Z II2215/45-17 Toyo Proxes 42215/45-17 Toyo Proxes FZ41215/45-17 Toyo Proxes T1-R1215/45-17 Toyo Proxes T1-S5215/45-17 Toyo Trampio R1-R1215/45-17 Wanli S-10991215/45-17 Yokohama Advan A0483215/45-17 Yokohama Advan Neova AD073215/45-17 Yokohama AVS ES10012