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Tire levers (two)
Co2 inflator & cartridge (w/ schrader valve attachment)
An old Schwinn 9-in-1 multitool (allen wrenches, screwdrivers)
A small pack of bandaids

...and (don't laugh) but I still carry an old, ancient, "Dog bone wrench" from the 70's or 80's. It's one of those things I just can't get rid of!