Got a flat tire today, and didn't have a spare innertube. Would have been a long walk, but I had my cell phone.

I use presta valves but Schrader valves are good, too.

For a fatter rim like a beach cruiser I would use a Schrader.

Lately, I have been thinking about getting back into biking. As a long time runner, I'm starting to see the toll that running is taking on my body:
- Ankle and knee problems.
- Foot Wear (blisters, etc)
- Boredom

I think I will start by doing some cross training on the bike, and maybe enter a few short races to see if I like it. Any runners out there care to share how moving to bike riding has improved your fitness?

Most of all, when you are running you can't coast. :)