Originally Posted by
blakcloud
I have two commuter bikes that are essentially the same. One is built up as a single speed, which I use 95% of the time, the other multipseed. If I have a problem with one, ie. flat tire, I just grab the other. It just gives me piece of mind.
I have a backup bike as well, and that is a close facsimile to my main commuter. I used the backup bike for a few days this year while I made repairs to the main commuter, or in my discovering a last minute flat.