The Dual is small enough to nestle under a seat without scraping against your thigh, yet itÕs big enough to hold two 700C tubes and two CO2 cartridges, plus an inflator. So, why two spare tubes? Because you never know whatÕs up the road, and itÕs nice to know that youÕre prepared. That extra tube will make the rest of your ride that much more enjoyable knowing that you wonÕt have to use your cell phone if another flat occurs.
27 cubic in.