16g / 25g Threaded CO2 Cartridges for Bike Tires

$18.85

As of 2026-10-27

These threaded CO2 cartridges are offered in 16g and 25g capacities, giving riders a choice between a lighter canister for quick road-side top-ups and a larger one for higher-volume mountain bike tires. The threaded neck is designed to screw directly into compatible CO2 inflators, so the cartridge stays secure while gas is released through the pump head.

Because the connection is threaded rather than smooth, the cartridge seats firmly and can be controlled more precisely during inflation. The 16g size suits narrow road tires where a small charge is enough, while the 25g cartridge provides more gas for wider mountain bike tires that need additional volume to reach riding pressure.

Each cartridge is a single-use item, so it is worth carrying a spare on longer rides. Store them away from heat and check that your inflator accepts threaded cartridges before heading out. The compact metal body fits easily into a saddle bag or jersey pocket alongside a CO2 pump head.

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