File under small news: Planet Bike’s 25g CO2 cartridge now comes in two-packs, saving you a bit of change if you need a couple oversized inflators. The 25g cartridge claims to fill a 29er mountain bike tire to 45psi and a cyclocross tire to 80psi. Yes, that’s a lot of air. Er, carbon dioxide. Available now on their website.


  1. For $6.50 per cartridge (in a 2 pack) I’ll pass… How do they justify the exponential cost increase everytime there is a different size manufactured?

What do you think?