Hello Everyone,

Could someone please assist/point me into a direction in trying to find out the wheel offset calculator?

It's for a 1970 Porsche 911 that has been converted to a 993TT. Basically everything with the suspension is still a 911 but the body has been converted to a 993TT.

I am having custom rims made (over seas). And I need to give them specs before they start fabricating the rims. I am thinking of going 19x9.5 (f) and 20x11,12,13 (r). But need to figure out the offset to determine what size to go with. I don't want the rims to stick out beyond the body of the car.

Any help or assistance in the matter is greatly appreciated.

 

This page should help:

http://members.rennlist.com/1976c38/index.html

It gives the offsets for various OEM Porsche wheels, and shows you what measurements/calculations you can do to determine what your new wheels need to be.

 

This is a great site to calculate the offset, enjoy.

http://www.1010tires.com/WheelOffsetCalculator.asp