I have a set of new Champion RS98s on my 997 C2S that I'm very happy with but am still tempted to add spacers to give them a slightly more aggressive look (I posted some pics in an earlier post). After researching the forum and calling Champion, I was unable to find the exact size I should go with. Any recommendations out there on what size and where to order? My specs are as follows:

19 X 8.5 Front with 53 offset
19 X 11.5 Rear with 62 offset and 305 tire
Techart Springs

Thanks.

 

The OEM wheels (other than Carrera Sport) are 19x8 et57 (F) and 19x11 et 67 (R). With the Champion sizes you list above, the front wheels are already 10mm further out than OEM and the rear wheels are already 11mm futher out than OEM. Based on this you might not want to push them any further out. You can play around with wheel size and offsets at www.1010tire.com

 

I have the same Champion wheels on my 997 S and they look pretty aggresive as it is.

 

probably safe to go 5-7mm.
i think the current offset, lip size tire size/type all need to be considered.
currently my offsets are 47 and 49 with my kinesis f110, 7mm spacer in front and 15mm spacer in rear.
no rubbing, if i had 305 in the rear, it would be sticking out too far, but that also depends on the type of tire i guess.

 

Keep in mind that as you acquire a better look you may be trading away some of the steering characteristics that Porsche refined for the 997. You may experience a higher level of understeer due to the wider stance in the back, if shimmed out.