Guys,
I am in a same boat I read on another thread where one user had purchased PILOT SPORT ALL SEASON 275 /35 R21 103Y XL BSW for rear and the 265/35R21 for front. He said it doesn't touch the front. Please check this link. Michelin Pilot Sport All Season 4 on Uberturbines- 265/35 & 275/35R21