Best balance on rear tyres

[juankimalo]

Rear tyres on a 996 MK I are 265 on 18" rims, but on a MK II they are on 285

What do you think about the best compromise?

If you have the 285 size , then the car would oversteer, wouldn't it?

[Loren]

The original 996 (narrow body) had 7.5 inch wheels in front with 225 x 18 tires. The rears were 10 inch wheels with 265 x 18 tires. In MY02 Porsche changed the front wheel width to 8 inches with the same tire size. In MY02 the rear wheel width remained the same but the tire width went up to 285 x 18, The result was that the handling remained about the same (understeer vs oversteer).

So no, wider tires on the rear will cause more understeer. You can counter balance that with wider wheels and/or tires in the front.

[juankimalo]

The original 996 (narrow body) had 7.5 inch wheels in front with 225 x 18 tires. The rears were 10 inch wheels with 265 x 18 tires. In MY02 Porsche changed the front wheel width to 8 inches with the same tire size. In MY02 the rear wheel width remained the same but the tire width went up to 285 x 18, The result was that the handling remained about the same (understeer vs oversteer).

So no, wider tires on the rear will cause more understeer. You can counter balance that with wider wheels and/or tires in the front.

Thanks Loren