They are very close to an optimum fit on the 8" wheels, spec range is from 7.5" to 9" width:
Also worth noting that the AR-1 235 rears are 10mm shorter (ie less tall overall) than the 185 fronts, whereas the 205 rears are (more conventionally) taller than the 185 fronts by 25mm. Nothing that can't be sorted out with adjustable platforms, of course..
I agree with James's comments about warm-up problems on track - I tend to run much higher pressures with AR-1s (maybe 25 psi) than with other track tyres
Rich, I've only ever run Yokohama A021 or A048, so I defer to the above comments. However, you mention "60:40 road:track". Nankang say their NS-2R is a 50:50 road:track, and the AR-1 10:90 road:track. I'm going to try the NS-2R. HTH.
Thanks James, that's really helpful. I had been looking at the sizes but it's not easy to imagine, so pics are super helpful.
Edit: replying to #12, not #14
Fancy a club Nürburgring trip in 2023?
FYI I spoke to Avon and they said they have no ZZS tyres and it will be early September before they have stock again as production was shut down for two weeks over summer.
I ended up getting a new wheel set with some part worn ZZS tyres and put on ZZRs to replace my worn ZZSs. Having just completed the first track day with the ZZRs, I've come away impressed how close the ZZS is to the R - grip levels are very close - the R doesn't go off as quickly when hot but it shows that the ZZS is a excellent all round tyre. I must admit I was expecting a bigger delta given the nearly slick tread on the R but I guess the ZZS has a pretty aggressive tread pattern itself.
Edit: not sure if it was me but the R also feels a little more compliant on the road and softer on turn-in than the S. Not sure if it is a softer compound or not but it feels quite forgiving and the tyre wall feels softer to me,