Hi, I bought a set of snow tires from the Discount Tire on E. 14mile rd in Troy, Mi. Was looking for a price on some new tires for my cobra. 315 Nitto Dr's in 17" and 275 Nitto Dr's in 17". Im not sure if the 315's will fit on my stock 9" wheel though.. I would like to go back to the same place I got my snow tires from if possible. Thanks!