I carry a tube, a folding hex wrench tool kit thing, a cell phone, and a credit card + I.D. I figure that can get me out of just about any jam I find myself in. If your tube and tools can’t get you home, well, maybe it’s time you call and old friend and catch up on times passed.
But seriously, the one time I couldn’t get home (my rear derailleur hanger broke), I tried taking the train (on which I was flat out denied admission on w/ my bike, “How do you expect me to get home?!” I shouted to the engineer as the train rolled away. “Ride your bike!” “Why the F do you think I’m taking the train! I can’t very well ride home with my derailleur dragging on the ground!” I retorted. I digress…still a little pent up anger there) but when I couldn’t get on the train I called a cab. $25 later it was the most expensive ride I’ve ever been on.
ahoodlum,
Had you had a chain tool, like a Park CT-5 in your seat bag, you could have shortened your chain to make your bike a single speed to get you home. This tool also comes in handy if your chain breaks while riding, something that has happened to me twice in the last 50,000 miles. But it was no trouble to drop out the bad link and put the chain back together to permit me to get home without any other difficulty. Actually, it took less time than fixing a flat.
I concur with the previous recommendations of 1 or 2 tubes, tire levers, patch kit and a multi-tool with allen wrenches and straight and phillips head screwdrivers.
I would add a piece of Park Tool tire boot and a small foldable sharp knife, the chain tool and a spoke wrench that fits your spoke nipples.
With these modest tools and supplies(mine fit in one of those minimalist seat bags so I’m not talking 10 additional pounds of shit) you should be able to manage almost any breakdown to get you back home without additional cost or assistance.
Mind you, ID, a copy of proof of health insurance and $20.00 to $40.00 is mandatory and goes without saying.
All the above is based on top of you or your LBS maintaining your bike in good mechanical condition. This will decrease considerably the likelihood that you will ever need to use any of your tools and supplies in your seat bag other than your tube, patch kit and tire levers.