How hard it 30psi?!
Kind of a stupid question I know. But I've always pumped up my tyres just til they 'felt ok' and rode. For Christmas I had a track pump with built in gauge. I pump up my tyres and they're way way way harder than I've ever had them before and the gauge is showing about 25psi! I'm talking as hard so the back barely changes shape when the bike is sat on (hardtail). Dodgy gauge?