From lights and mirrors to pumps and spare parts, Blackburn tries to think of everything so you don't have to. They're out there riding too, and they're all about aiding you on your quest for a perfect ride. And, there's always going to be that time where you think you have a spare CO2 cartridge, but you don't. That's why the brand offers the option to buy in bulk, so you can avoid sticky situations and always come prepared. The Blackburn CO2 cartridges are offered in 16 or 25 grams and available in a 16-pack or 20-pack, so you can stock up.