Right now I'm on an older set of tires so I don't mind experimenting.

I first started thinking about upping the PSIs after riding my bike with a low tire, which felt like dragging an anchor, even on level ground.

**Somewhat off topic, has anyone else discovered that some bike tire pumps also work on your car tires? I just found out last week that my cheapo Bell pump works on my car, which means no more $.75 to an air pump which doesn't work.