I currently have 17x8 & 18x10 wheels and am using 215/40/17 front and 265/35/18 rear tires with RM springs, Koni's and RM sway bars. I experience much understeer with the fronts even with the Koni's turned 1 turn from soft on the front. I know that some are using 225/35/17 & 285/30/18 but the fronts in this size are difficult to find. Any suggestions would be appreciated.