Joined: Feb 2013
Posts: 1,472
Likes: 11
From: Near St. Louis, Missouri
Bikes: Giant Defy Advanced, Breezer Doppler Team, Schwinn Twinn Tandem, Windsor Tourist, 1954 JC Higgens
I have a couple different mini-tools that have a chain tool. Good enough for an emergency repair.
I also carry an 8, 9, and 10 speed Shimano replacement pin so that I can help others. For newer Shimano chains, you really don't want to reuse a pin like we did back in the days of 5 and 6 speed bikes.