Manual pumps are bulky and time consuming, especially when you get a poorly timed flat in a terrible section of trail. Thankfully there is the Crank Brothers Sterling CO2 Inflator +2 Cartridges! Small in size and only 45 grams, you won't even notice it in your pack. Included are two 16 gram cartridges so this kit is grab-and-go right out of the box. Plus it's compatible with both Presta and Schrader valves so you can fix that flat and get to styling out that jump line ahead. Crisis averted.