I started carrying a chain tool after I had a chain break in rural Arkansas. I got a farmer to help me put the chain together and I gingerly rode into the nearest town, arriving at a bike shop just minutes before closing time.

The adjustable wrench is useful for removing pedals when I need to pack the bike for shipping. For those trips, I also have a roll of duct tape.

On a couple of trips, I carried vice grips, but I have never needed them and I couldn't think of any case where I would need them, so I don't bother carrying them anymore.

I'm planning to add a few bolts to fit bottle cage mounts and rack mounts. On one or two occasions, a bolt holding the rack in place worked loose and fell out. The rack still held, but I want to be ready in case something like this happens again.