i have 17 inch rims of my friends mazda mx-6, the tires curently on them are 215-40-17. Tirerack recomends 215-50-17, if i keep my very-low profile tires on will this negativly affect anything other then the speedo and odmeter. Will i be setting ymself up for def. ruining my rims with so little rubber? Will my turning raduis be affected? I'd also like to throw out that i live in boston mass, construction and pothole capital of the east.