cooney

I am planning to replace the original Dunlop Sport Maxx tires on my IS350, sized 225/40-18 front and 255/40-18 rear, with Michelin Pilot Sport PS2 tires, and am also considering going to the same size tire on each wheel, either 245/40-18 or 235/40-18. I had an early E36 BMW M3 which ran the first Michelin Pilot Sport tires, 235/40-17 on all four corners (BMW later went to wider tires at the rear), and was very happy with that setup. In addition to going to Michelin, I want to increase the contact patch on the front axle, to see if I can get more steering feel -- I do miss the M3 in that department.

Is 245/40-18 too wide in front? If so, will 235 work? If I do this, will subsequently installing after-market springs & shocks, or coilovers, create problems?

Will decreasing the rear tire size from 255/40-18 to 245 (or perhaps to 235) going to affect handling much?

Am I crazy to not just replicate the OE sizes?

Thanks for your help.

cooney

StickyIcky

should be no problem.

if your going 245 all around, i would suggest to put the 8.5's in the front and 8's in the back so you dont lose your steering precision as 245's on an 8 is going to be more floppy.

im all for reducing understeer