Distributed between Camelbak MULE and pockets, I bring:
- 100 oz. hydration bladder
- Topeak minipump (with patchkit in handle)
- spare tubes
- Topeak Alien minitool
- two spare 9V batteries for my shocks (K2 SmartShocks)
- digital camera (Minolta DiMage X)
- spare battery for my digital camera
- mini-tripod for digital camera
- wallet (actually just the insert with ID, $20 cash and a couple of credit cards)
- clear lenses for my sunglasses or smoke lenses if I have the clear ones already in place
- mini first aid kit (First Aid Only FA-112)
- small bottle of lube
- couple of spare spokes
- replacement spare der. hanger
- couple of spare links for my chain (SRAM)
- a couple of zip-ties
- small roll of electrical tape
- small roll of toilet paper in plastic ziploc bag
- mobile phone (Nokia 8260)
Sometimes I'll also strap a Tyvek cycling rainjacket (or something heavier/warmer) to the bungee if the weather looks questionable.