[jb92563]

I am in the same boat, where I need 2 rears.

I want to put Hankook V12's on the back and leave the Michelen Pilot Sports on for a while longer that are perhaps 50% tread left up front.

With standard new tires the 986 is supposed to under steer but since my rears are nearly gone I get the back end letting go before any understeer can take place, so I figure new rears will fix that and when I replace the fronts in another year I'll go to 225 wide Hankooks instead of the standard 205 and the fronts will then be closer to neutral and they should all break traction at nearly the same time and cause drift instead of under/over steer.

For racers and tuning I can see how rubber consistency is important so you can tune properly but for street use I don't see any reason for a major impact since they are all performance tires.

Yes the ride will feel different but that gets corrected on the front tire change out to the same brand/type as the rears.

I doubt it will cause any nasty behavior on the street unless your really pushing hard or racing.

My 2 cents