Originally Posted by catonec

My seat bag has:
spare tube,
patch kit (for 2nd flat),
tire levers,
co2 inflater w/2 cans,
small phillips screwdriver (deralleurs.)
allen keys,
chain tool and extra link,
small vice grips(?),
small knife (?).

My jersey pockets have:
cell phone,
medical insurance card,
$10
granola bar or 2.

I also bring 2 20oz waterbottles on frame (1 has a sports drink the other straight water).
if my planned ride is over 50 miles I put a 3rd bottle in my jersey unless I know where I can refill.

I do not leave my bike unattended.