LEZYNE HV Bicycle Hand Pump, High Volume 90 PSI, Presta & Schrader Compatible, Compact Bike Pump

I have not had the chance to use the pump (medium version) to fix a flat in the field, but I did test it in my garage. The schrader and presta connections seem solid. Of course such a small device is going to require LOTS of pumping to fill a tire depending on 1) the tire volume and 2) the final pressure you desire. I have 406 (20") and 559 (26") tires on my trike, and I will accept the occasional workout given its small size, weight and solid connection to my tubes. Time will tell if I am correct in my assessment.This pump appears to be the earlier version of the "Drive HV" series. The newer is the "Grip Drive HV" which has knurling on the handle. This model is cheaper and I would think works just as well.

This micro pump is a beast. Fits perfectly in my hip pack and delivers every time. I find that threading the inner floppy tube onto the valve first, and then attaching the main pump works best for me. The size of this thing makes it perfect. You get what you pay for; and might as well invest in quality products for the things that are important to you (mountain biking)!

This does what it's supposed to do. It's made of quality materials, it inflates, it attaches to the bike easily and it looks good (unobtrusive). I expect it to last for years. However, be aware that it takes (me) 150 pumps to get my 29er tube to a ride-able pressure (firm, but shy of the 50psi I prefer). That's a forearm workout, for sure! So much for "HV" (high volume). I'm considering carrying cartridges again as the go-to means of inflation and save the pump for when I'm out of cartridges (or save it for when friends have a flat!). Also, it rubs on the bike's frame and I need to put some frame tape there to protect the paint. Maybe that's more a function of my wide Trek frame, but it rubs just the same.

Mountain bike, 26 x 2.35 tires.I don't know what they were doing in the middle of nowhere, but ran over a strip of construction staples. Luckily some picnic tables nearby, so "field shop" set up. I've had a lot of different pumps over the years, and this one is amazingly effective for me. I've come to really despise those "clamp on" attachments. This one screws onto the presta valve, apparently with a one-way valve built in. Solid connection, no frustrating leakage, doesn't pop off, etc. I was pleasantly surprised how quickly I was able to get the tire back into a useable pressure level. Pump got a little warm in the process, but that's just physics, shows how well it is compressing the air.Would definitely buy this again and suggest it to anyone looking for a nice effective compact pump.

Great pump, works great and I like the flexible hose design. The only reason I can't give it 5 stars is that the hose rattles beyond belief inside the pump even when stored in a pack.

My husband had one of these for a while and I loved it so much I replaced my larger pump for one of these. You can find higher volume pumps but I'd rather have to do an extra couple pumps with this and reap the benefits of how compact it is. It can fit in my backpack, hip pack or even pocket. I also love the flexible hose that attaches and protects my valve stem from snapping off or getting bent at a weird angle. I also like that is has both shrader and presta valves and it's super easy to switch from one to the other. Everything I own is presta but having shrader allows me to help other riders out from time to time. It's a great pump.

I really like this pump. I'm not one for attaching things to my bikes, especially a pump that I'll use for more than one bike, so I don't use the bracket. I carry this pump in a small Osprey backpack and I literally can not tell it's in there.The screw on design works well and is easy to attach and makespumping up a tire easier than the type that clamp directly to the stem.I have used this on both presta and Schrader valves. It works flawlessly on both. It inflates a 700c x 50 tire quickly. I have used it on a 26 x 4 tire. It takes a while but it's faster than other small pumps I've used. Of course my wife had to make some discourteous comments on how it looks like I've had a lot of practice using this 😐

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