just running a 15"x8" rim here, but i am using the 275/60 with no ill effect on steering. the change in speedo is numeric, just figure it and go by it. if you do, you end up with better gas mileage and a less useless first gear for the manual crowd. everyone agrees that they look far better than the stock crap that came on her. i am running the firehawk indy's for dry traction and i highly recommend them for anyone who wants good dry handling and doesn't care about tires lasting.