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CO2 bike inflators and cartridges provide a fast, reliable way to re-inflate tyres during rides. Whether you’re racing, commuting, or tackling trails, a compact CO2 inflator lets you get back on the road in seconds. Browse our range of threaded and unthreaded CO2 cartridges, inflator heads and sleeves from trusted brands including Topeak, Azur, Positz and X-Tech.
Multi-Buy Offer
CO2 Bike Inflators & Cartridges
Positz CO2 Safety Sheath – Anti-Freeze Sleeve for 16g Cartridges
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Price range: $4.95 through $8.95
This product has multiple variants. The options may be chosen on the product page
Multi-Buy Offer
CO2 Bike Inflators & Cartridges
Price range: $16.95 through $59.95
This product has multiple variants. The options may be chosen on the product page
Multi-Buy Offer
CO2 Bike Inflators & Cartridges
Price range: $6.95 through $48.95
This product has multiple variants. The options may be chosen on the product page
Multi-Buy Offer
CO2 Bike Inflators & Cartridges
Price range: $19.95 through $129.95
This product has multiple variants. The options may be chosen on the product page
Tubeless Tyre Accessories
Topeak TubiCartridge R16 CO2-Compatible Compact Tubeless Repair Kit for Road Bike
$49.95
CO2 Bike Inflators Explained
CO2 inflators use small compressed gas cartridges to fill your bicycle tyres quickly. They’re ideal for on-the-go repairs or race-day efficiency, saving precious time compared with manual pumps. Most inflators work with threaded CO2 cartridges, while some accept non-threaded types — check your model before purchasing.
Choosing the Right Cartridge Size
Cartridges are available in different capacities, such as 16g for road bikes or 25g for mountain bikes. Larger tyres need more gas to reach the right pressure. It’s often worth carrying a spare, especially on long rides.
Tips for Safe Use
- Always use a CO2 sheath or sleeve to prevent freezing your fingers during inflation.
- After inflating, check pressure with a gauge if possible.
- CO2 escapes faster than air — re-inflate with a regular pump once you’re home.
Australian Cyclists’ Choice
At Mr Cycling World, we stock a wide range of CO2 inflators, cartridges, and accessories at affordable prices. All items ship from Adelaide, with fast delivery Australia-wide.
FAQs
Are CO2 inflators compatible with all bike valves?
Most inflators fit both Presta and Schrader valves. Some require an adaptor or are designed for one valve type only — check the product details before buying.
How many tyres can I inflate with one CO2 cartridge?
A 16g cartridge typically inflates one road bike tyre to full pressure, while a 25g cartridge suits one mountain bike tyre. Always carry a spare for peace of mind.
Are CO2 cartridges reusable?
No. Each cartridge is single-use and recyclable once empty. Keep used cartridges separate from full ones when packing for a ride.
Is CO2 safe for tubeless tyres?
Yes. CO2 inflators work well with tubeless setups, although some sealants react slightly with CO2 and may harden faster. For long-term inflation, top up with normal air once home.