I've got Velocity Dyad rims on my touring bike, which are about the same width as the A23s. I was running 700x28 Conti 4 Seasons on those wheels but recently switched to Vittoria Randonneur Hyper 32s. The Contis I would pump to 95 psi rear and 85 front. The Vittorias are much wider and cushier riding, and I've been pumping them to about 80-85 rear and 70 front. Still experimenting with pressures on Vittorias because I haven't had them very long and could probably run them at 70 rear and 60 front.