I blew up the front tyre of my bike last night to find that it had blown this morning. The recommended PSI was 116 and I put 110 in. Is the gauge on my pump broken or are these guidelines stupid? A similar thing has happened on my commuter a few times. Recommended 90 psi, put in 70 and the inner tube forces the tyre off. That was with my micro pump. Why don't the manufacturers set their maximum psi lower? I most definitely had the tyres on completely secure etc etc. Anyone else experience this?