I would like to ride MICHELIN summer tyres on my X3 35d. But no more RF (they ride on the front flanks terribly off). MICHELIN offers only the Primacy (with*) for my vehicle (v. 245/45 R19; h. 275/40 R19), only as RF! On the other hand, there is the Pilot Sport as Non RF, but only in MO, for Mercedes. Question: Can I also raise the latter on BMW and can have this negative consequences? Additional question: How is the Hankook K117?