Easy to carry: a tool kit as part of a hydration system

The main thing to remember is that simply reading another rider's tool list isn't a guarantee that all will be well. Chances are that you will either be packing more than conditions really require (if you are out on a training ride or just for the day, but are hauling the kit that tourers carry), or if you're a tourer that you won't be packing enough. Keep this in mind when putting together your personal kit from the list below. And remember that the tools, tube, spokes, and gear and brake cables that fit your riding partner's bike might not fit yours.

Tools for Tire and Wheel Repair

spare tube
tire levers
patch kit
air pump
air gauge
Schrader tube valve cap
boot material
spoke wrench
spare spokes

Wrenches and Screwdrivers

Allen wrenches
six-inch crescent (adjustable-end) wrench
channel locks (small: six- or seven-inch handles)
cone wrench
small flat-blade tip screwdriver
small Phillips screwdriver

Miscellaneous Tools

chain rivet tool
spare chain link
baling wire
duct tape
rear derailleur pulley
spare nuts and bolts
lubricant
spare gear and brake cables