Zefal 25g Threaded Co2 Cartridge
Inflate your tyre in seconds with the Zefal 25g Threaded CO2 Cartridge. Reliable roadside rescue for cyclists. Only $10.15 at The Cycle Zone. Shop now.
Key Features 25g CO2 capacity — enough to fully inflate road and MTB tyres Threaded valve connection for a secure, leak-free fit Compact and lightweight — easy to pocket or store in a saddle bag Compatible with all standard threaded CO2 inflator heads Fast inflation in seconds — ideal for roadside emergency repairs From Zefal, a trusted name in cycling accessories since 1880 Who Is This For? This cartridge is perfect for road cyclists, gravel riders, commuters, and mountain bikers who want a fast, fuss-free backup inflation option. If you ride regularly and want peace of mind without carrying a full-size pump, keeping a Zefal 25g CO2 cartridge in your kit is a no-brainer. Why Buy From The Cycle Zone? The Cycle Zone is our trusted local cycling specialist, with expert staff who ride and know
Frequently Asked Questions
- Is the Zefal 25g CO2 cartridge compatible with all inflators?
- It is compatible with all standard threaded CO2 inflator heads. Always check your inflator specifies threaded cartridge compatibility before use, as some inflators are designed for unthreaded cartridges only.
- Will a 25g CO2 cartridge fully inflate a road bike tyre?
- Yes, a 25g cartridge provides enough CO2 to fully inflate most road bike tyres up to around 100–110 psi, and is also sufficient for typical mountain bike tyre volumes at trail-ready pressures.
- Can I reuse a CO2 cartridge after it has been partially used?
- No, once a CO2 cartridge has been pierced and used, it cannot be safely resealed or reused. It is best to carry a spare cartridge on each ride to ensure you always have a full charge available.
- Do I need a separate inflator head to use this cartridge?
- Yes, the cartridge must be used with a compatible threaded CO2 inflator head, sold separately. The Cycle Zone stocks a range of Zefal and other brand inflators that pair perfectly with this cartridge.