I currently have the stock Goodyear ZR45 245/45/17 tires on my stang. I will be putting in my 3.73 gears soon and looking for new tires. I was short on money and was looking at it was either 265or 275/30/17since they were half the price of the same tire yet in 275/40/17. now with them being not quiet as big in diameter this will bring my top speed down and acceleration up? and ifso would that be a good idea or bad idea?