Quote:
Originally Posted by Bill Verburg
The thing that determines s/r wrt the wheel is it's ET, higher numerical ET = lower s/r
a 911 w/ 7ET23.3 has a s/r of 52.4mm
a 930 w/ the 21mm spacer, whether from the o/s hub on late 930 or the 21mm spacer of early 930, has a s/r of 73.4mm
use a wider wheel like the early 911 Ruf 8s w/ ET 30 and the s/r goes down by the difference in Ets
the early Ruf 9 w/ ET17.7 would raise the s/r compared to a 7 ET23.3
RSR w/ the 21mm spacer and w/ 9ET3 has a s/r of 72.7mm
similarly track changes w/ ET changes, a 930 w/ 7ET23.3 wheels has a front track of 1432mm, 60mm wider than a 911 w/ the same wheel
the Ruf 8ET17.7 would reduce track by 35.4mm
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Thanks Bill, I appreciate the explanation. I'll go an whiteboard a visualization.
If I do Ruf 9&10 x 17 wheels on a 930 / M491, what are the recommended tire sizes? I assume there are a few pairing options? What are the aggressive, middle and conservative sizing options? I'm not a teenager anymore, so would prefer to avoid fitment issues.