Portland Design Works Tiny CO2 Inflator: Leather Sleeve for Optimal Performance Review

Very easy to use and easy to carry. I just tuck it into the side of my camelback with a couple of C02 inflators. Tried to use it twice already. No freezing fingers and no leaks. Highly recommended.

Works well and even retains CO2 for days after first use which shocked me. It's kind of an emergency thing, but it's always a good idea to try it before you stray far from home. Requires a pair of cartridges for large gravel tires.

I bought this as a gift. I'm not very good with "bike life" but I was expecting a fully functional item. It's just a valve and bushing. Maybe others will know at first that CO2 is not included, but I didn't know that. I was disappointed that my gift was not fully functional after unwrapping it.

I haven't had an apartment for a long time. Got one today and was amazed at how well it works! Super easy to use and so small it easily fits in my tool box. Looks very high quality and should last a long time. If you don't need a paper shredder, this is the way to go. The 16 gram threaded cartridge filled my 700x32 perfectly!

Very nice design, first-class fit and workmanship, unfortunately the functionality is not as good as the larger PDW Shiny Object. I tried it at home and immediately noticed that it didn't fit snugly on the valve due to the valve's flat insertion through a silicone o-ring that lets air through and prevents the tire from being fully inflated. I was only able to get my 25c tire to 60psi versus 84-90psi with the Shiny Object. Also, the O-ring wears out after you inflate a tire, which isn't exactly…