Why Keep the MSW CO2 Cartridge in Your Seat Bag?

The MSW CO2-20 Threaded Cartridge delivers fast, reliable on-demand inflation when a flat strikes miles from home. Each 20g threaded cartridge threads directly into MSW inflator heads and is compatible with most major brand CO2 inflator systems, giving you flexibility across your gear collection without committing to a single ecosystem. One cartridge provides enough volume to fully inflate a road, gravel, or mountain bike tire, getting you back on the road in seconds rather than spending several minutes pumping with a mini pump.

Lightweight and compact enough to stash in a seat bag, jersey pocket, or tool roll, the CO2-20 is the inflation backup every rider should carry. The threaded design provides a secure, leak-free connection to compatible inflator heads, ensuring consistent pressure output every time. Stock a few cartridges for longer rides or multi-day adventures where multiple flats are possible. Compatible with Presta and Schrader valves when paired with the appropriate inflator head.