What Our Gearhead(R) Experts Are Saying: "I always keep a couple of these 16g cartridges in my saddle bag. They're super compact, work with threaded inflators, and save me when I don't want to waste time pumping after a flat on the road or trail. They're reliable, easy to carry, and inflate my tires in seconds." When we're out on a long ride, the last thing we want is to be stuck on the roadside struggling with a mini pump. That's where the Hutchinson HUTF05B C02 Cartridge Refills come in. Compact, lightweight, and built to work with threaded inflators, these 16g steel cartridges deliver fast inflation so we can get back to rolling without losing momentum. We trust Hutchinson's universal compatibility, whether we're riding road, gravel, mountain, or even commuting on an e-bike. The small size makes them easy to stash in a jersey pocket or saddle bag, and knowing we can re-inflate a tire in seconds gives us peace of mind on every ride.