We've started transporting our tandem inside our SUV occasionally, so I decided to replace the timing chain with a Gates carbon belt to reduce the chance of chain grime getting on things.

I bought a second belt as backup. Wondering how many of you feel the need to carry a spare belt on your bike. I'm pretty conservative when it comes to getting stranded, and usually carry a spare folding tire as well as all the other normal stuff. But Gates warns that the belt is vulnerable to damage if it gets folded or bent wrong, so I'm concerned about having it in the pannier and getting jammed by something else getting stuffed on top of it, etc. Just how likely is it that a CDX belt will fail in the field? What's the best way to carry one on the bike, if advisable?