If you've got a nasty flat, don't be that guy pumping until you are out of breath or the guy that completely forgot the pump, get the Crank Brothers CO2 25G Cartridge w/inflator. Quickly and easily pump your wheel up with this kit, and for tubeless riders, this is a real lifesaver on the trail. Super small, this kit easily fits into your pocket or saddle bag so you can always be prepared. Grab one of these kits today and take care of your bike on the trail.