09-04-2021, 10:32 AM
I fitted a set of Longstones on our chummy a couple of years ago, after having always had Avons running at 22psi all round. They told me to try 30psi, but did say this might be a bit high for a chummy. After some experimentation, I settled on 25psi front, 27psi rear. The handling of the car in general feels good to me on the Longstones, and particularly the ride quality seems much better, although admittedly the Avons were quite a few years old at that point. That's my experience anyway.