Bicycling.com posted a video they did during this year Tour de France, where they talk about tire pressure with a mechanic from the Garmin-Sharp-Barracuda team. Here's the gist of it (as I understood it):
- pressure in front is always 10 PSI lower than in the back
- road bike : 123 PSI (back) in good weather, 100 to 105 PSI (back) when raining
- tt bike: 137 to 145 PSI (back) in good weather
Obviously the limits for the (clincher) wheel/tire/tube needs to be respected, otherwise you'll kaboom! ... like I did a couple of weeks ago (woops!).
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