Originally Posted by Papa Tom

I have a Topeak MTX DXP trunk bag/pannier set, so I've got lots of room. In that, I keep an entire clip-on saddle bag that includes a tire lever, tire patches, Presta to Schrader converter (I fix other people's tires more often than I fix my own), stand-alone chain tool, small length of spare chain, individual Allen wrenches, small screwdriver, individual flat wrenches, spoke repair kit, tire boot, 2 Band-Aids, rubber gloves, identification/medical info card, a quarter, and a $5 bill. When I don't need to carry the whole trunk bag, I can just slide it off the rack and clip the saddle bag under my saddle so I have any necessary tools to handle a breakdown.