Carry an extra tube, etc.!! Yeah, genius suggestion, I know 😀 . I have two tubes, patches, levers, multi-tool, and a subpin in a wedge pack under the seat of each bike. The pump and a couple of additional items stay in the camelback. I have yet to need ’em, except for the random puncture, but as soon as I deviate from carrying that gear I’ll probably break a chain and blow out both tubes in the same mile.