I'm mostly on 25's and that's the max on most of my bikes, having veered away from 23's. OK, and I have one bike on 28's and there's room for more. If the Conti GP5000 in 30mm came in cream sidewall instead of black only, I'd be willing to try a set.
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Larry:1958 Drysdale, 1961 Gitane Gran Sport, 1974 Zeus track, 1988 Masi Gran Corsa, 1974 Falcon, 1980 Palo Alto, 198? Vitus 979. Susan: 1976 Windsor Profesional.