AndyT

Blues are the same size they fit just fine. did your S9As have the rib on the ouside sidewall right above the wheel lip ?

Geoffrey

I switch between yellow cups and blue cups on my rims and don't see any difference in fitment other than the extra rib that the blue cup has so I'd assume it would be fine on a standard cup rim. My rims are 12".

AW

I did not take temp, however, the hot pressure was around 30psi which probably means 31 while running.
I have definitely seen a better longevity with yellow cup rears. I'm no pro driver but with these I can run low 1:55 at thill (full course) for 8-10 heat cycles.

With the S9A, I could only do that for 3 heat cycles + a few laps. All this with the same setup.

I guess I'll switch the blues. I'm probably switching to a 997 cup next year anyhow.

AW

AW

I would love to check but I'm don't think I understand what you are talking about. Any pic?

Thanks

AW