I'm new to getting wheels on my car, but have finally decided to take the plunge. Someone I know mentioned to me, Porsche's may need hubcentric rings when putting on rims. I have no idea what these are or if I need them. Any help would be appreciated. Thanks.

 

you don't have to worry about it, if you buy good quality wheels like HRE, DDP, ...
they are custom made for Porsche you will have HubCentering Ring most of time high end wheels are made specific for your car you don't need the ring at all.

the only time I had problem with hubcentering right was the time I put my Volk Te37 Subaru fitment on my VW GTi

 

The centerbore of a wheel is the size of the machined hole on the back of the wheel that centers the wheel properly on the hub of the car. This hole is machined to exactly match the hub so the wheels are precisely positioned, minimizing the chance of a vibration. With a hubcentric wheel, the lug hardware will not be supporting the weight of the vehicle, all they really do is press the wheel against the hub of the car. Some wheels are not hubcentric and use high quality, forged centering rings that lock into place in the back of the wheel.

Most top shelf wheels are made hub-centric to the car, but a wheel with good quality centering rings work just as well.

If you have non-hubcentric (lugcentric) wheels, they should be torqued correctly while the vehicle is still off of the ground so they center properly. The weight of the vehicle can push the wheel off-center slightly while you're tightening them down if left on the ground.

 

Thanks for the help. Had them installed today...I'll post some pics later.