I have a 997 C2 non-S, and I am wanting to do this combination: Cargraphic Springs, 19" Carrera Sport Design Wheels, 15MM rear spacers, moving from 295s to 305s in the rear, and moving from 235s to 245s on the front......but I am worried about a couple of things.

1st. Will this cause me to rub? (Front or rear)
2nd. Will the wider tires and wider rear track create way too much understeer, even with the wider front tires?
3rd. Can I even fit 245s on the front?

Thanks guys.

 

Are there any speculative opinions?

 

Counter-point is "keep the car stock, nothing wrong with it so no risk of rub or other problems in the future". There have been some reports of blown shocks due to lowering springs. I've heard also of ABS issues with wheels / tires that are too wide on the rear, though I think those reports were of wider than 305.

The C2 was set up with 235/265 tires, so 30mm different front to rear. If you go to 60mm different then it makes sense there will be more understeer, though the total contact patch is greater. Reports are that 245 works on front, but wider can cause problems.