Kazzz

I mean wheel carrier hub (the piece that the caliper and rotor bolt onto).

Ok I know Im asking for a miracle, but....does anyone out there know if the 996 GT3 knuckle will fit on a 997 carrera???? Thanks in advance.

If you are reducing the offset by 16 mm, that means that the new wheels will be moving outward by 16 mm, so the tires might rub your car. That will be amplified by the fact that the tires you are thinking of using are wider than the ones you currently have by 10 mm (305 - 295). So we are in theory talking about 16mm (from offset change) + 5mm (1/2 of the extra tire width) in extra space you need between the tires and the fenders in your current setup to be able to accomodate the new wheels and tires. Measure it, if you have much more than 21mm between the tires and the fenders currently the wheels will fit. If you are close to the 21mm mark it is too risky - after all this is not precise math! BTW, spacers will not solve your problem - assuming one exists - since all they do is to move the wheels out even further. Best of luck, Gus I have a 997 and did the exact same upgrade with c4 carrera classic wheels with 11x19 ET51 on rear with the 305 michelins dropped with H&R springs. They fit perfectly without any rub. I also had them on with the stock suspension and there weren't any problems. Some might say that they may look a bit too aggressive but they in fact are almost the exact same offset as the techart formulas for the porsche which in my opinion look great on the 997s. (They are only 1mm wider offset). The other nice thing is that you wont need to add any spacers for the rear. The fronts are the exact same wheel as on the regular carrera so they will need some spacers to bring them out a bit. I recommend 7mm. Here are some pics