Cup 1 - RS vs. RSA
10-11-2019, 11:39 AM
#1
Rennlist Member
Thread Starter
Cup 1 - RS vs. RSA
Trying to understand the real world differences between cup 1 wheel sizes and offsets between RSA and RS. They seem to be as follows:
RS America:
With the same size tires, is handling affected by the wider wheel? Are there other advantages to one over the other?
RS America:
- front: 7J 17 55mm w/ 205/50ZR17
- rear: 8J 17 52mm w/ 255/40ZR17
- front: 7.5J 17 55mm w/ 205/50ZR17 (1992)
- rear: 9J 17 55mm w/ 255/40ZR17 (1992)
With the same size tires, is handling affected by the wider wheel? Are there other advantages to one over the other?
Last edited by GBX; 10-11-2019 at 12:46 PM.
10-11-2019, 01:26 PM
#3
Rennlist Member
Depends what you're after. A couple notes:
255 is a lot for an 8" wheel. I don't think you will get many positive reviews on that combination unless you're after comfort.
Most also want more tire up front. 225 is the popular choice. 235 also fits well on the desirable 7.5 and 8 wheels, however I would suggest a 265 (tough to find in 17" performance tire) or 275 rear tire with a 235 front. For that, You want a 9 or 9.5" rear Cup wheel.
To get the most rubber on the road, 8/9.5 with 245/275 is the ceiling on Cup wheels.
255 is a lot for an 8" wheel. I don't think you will get many positive reviews on that combination unless you're after comfort.
Most also want more tire up front. 225 is the popular choice. 235 also fits well on the desirable 7.5 and 8 wheels, however I would suggest a 265 (tough to find in 17" performance tire) or 275 rear tire with a 235 front. For that, You want a 9 or 9.5" rear Cup wheel.
To get the most rubber on the road, 8/9.5 with 245/275 is the ceiling on Cup wheels.