Quote Originally Posted by pooks
Okay, I have a question about all this, too!

The book I bought on riding said to check your air before every ride. Um, no, I haven't. We aired up the tires (using an air compressor hooked up to my husband's car -- he carries it in the back end all the time) when we first assembled the bikes and haven't checked since. (That has been about ten days, now, and I've ridden 31 miles and he's ridden half that.)

How often do you check?
Low pressure tires (like those on your hybrid) loose air less quickly than high-pressure road bike tires.

On my road bike I add air at every ride, or at least every other day. I don't bother checking the pressure and re-inflating: I just plug the pump on (it has a pressure gauge) and pump them back to 100-110, they're always at about 90-95.

On my hybrid, when I didn't have a road bike, I would pump the tires once a week or so.

On my current city-bike, that I just use to go around campus, never more than 5 km away, I pumped the tires .... hum, in January. Maybe I should check them out!