Lezyne HV Drive

Back in the days, I used to have a Zefal pump with a little hose that I coud screw on. Then I have lost it somewhere, and bought a new direct-attach pump, which always bugged me when I bumped my hands in the spokes, or when it undid itself from the valve while inflating a new tube on the side of the trail. Many years after, I stumbled on Lezyne pumps and found what I loved about my old pump :the Flex hose.

I have both a Pressure drive for my road/commuter bike and the HV Drive for my mtb pack. This HV drive has been in my backpack for many years and I have nothing wrong to say about it. It's small, lightish, durable, and has the double-sided Flex hose that hides in the pump's body. You can inflate both schreader and presta valves by using one or the other end of the hose. Since one end screws into the pump and the other on the valve, there is no air loss and the pump doesn't undo itself from the valve when inflating. This makes trail side repairs less irritating.

At first, I thought that the plastic threads in the pump's end would be problematic, but they have never deteriorated even after many years of using this pump even at home to inflate all my bike tires. The seals, orings and Flex hose have all stayed fresh and nothing has dried yet. This means that the pump still works like new and I can trust it all the time. I have just found out that Lezyne have a smaller version of this pump so I might grab one to use inside my Camlebak Repack bum bag to save some space as the HV Drive fits but takes most of the pack's width. 

I'm going to have to give this product five stars since I can't find any flaw yet after 8 years of use! Like many Lezyne products, it's intelligently-made, durable, and reasonably-priced.