Puncture repair upgraded: Lezyne Micro Floor Drive Digital HPG pump

For many, many years, I’ve run Giyo’s GP-61S mini pumps on both my bikes, Hyro and Bino. This is a cheap, plastic mini pump which has a simple, compact design, secured to the bike via a plastic cradle and Velcro strip pinned under a water bottle cage. It’s been fairly reliable when called to duty, usually to pump tires to anywhere from 65 to 85 psi. As simple as it is, it even sports a simple but reasonably accurate air pressure gauge in its dinky body.

Giyo GP-61S mini pump mounted on Bino

On one of the Manila Coffee Cycling Club’s rides in 2019, I found myself lagging behind the group, with tires that had gone a bit soft mid-ride. As I slowly caught up with the others at Corinthian Gardens in Quezon City, I dismounted from Hyro and took out the trusty Giyo to put in some more air into my tires. That was when my friend Marco Sadsad, a seasoned Metro Manila bike commuter, loaned me his Lezyne Micro Floor Drive HPG pump instead.

This long, shiny, metallic silver object was at least twice the length of the dinky GP-61S, and offered the advantage of pushing against the ground for more pressure per longer pump stroke. Tired from the heat, with sore, painful feet, I could remember my surprise in how quickly I had gotten my tires back to my riding pressure of 85 psi.

That memory had stuck with me long enough to eventually purchase one of my own. The only thing was, what I had apparently purchased wasn’t exactly the same as Marco’s chromed-out unit.

The Micro Floor Drive isn’t a new pump by any means, having been around since 2013 at least. It comes in either high-volume (HV) or high-pressure (HP) flavor, with separate variants packing in-line pressure gauges (HVG and HPG respectively). Lezyne didn’t leave well enough alone though. The company introduced two big changes to the Micro Floor Drive: it now came in black with some gold accents, and it ditched the old in-line pressure gauge for a digital unit.

But first, a better look at the Micro Floor Drive. As mentioned, it is effectively a miniature track pump or floor pump, made out of CNC-machined aluminum, good for up to 160 psi (11 bar), and weighing in at a rated 208 g. It’s got a tiny fold-out footstep for stability, while drawing the pump in and out through its remarkably long stroke. That compressed air feeds through its own rubber hose, terminating in a Presta/Schrader switchable chuck that threads onto your valve stem. By separating the actual pumping body from the valve stem, that hose helps protect it from shearing clean off its inner tube.

While the screw-on design provides security, Lezyne’s pumps are notorious for taking Presta valve cores along with their air chucks as you unscrew them off the valve, and it’s happened to me a few times. This particular gold-colored chuck has an “ABS” valve which helps bleed air pressure from within the hose. On a Presta valve, this supposedly aids removal of chuck from valve stem, and reduces the chance of unintentional valve core removal; on a Schrader valve, this can act as a manual bleed valve to let off excess air pressure. I’m guessing I will either need a bit more practice with removing the chuck from the valve, or just further tighten the valve cores I have.

This pump also includes what Lezyne calls its “speed chuck,” which is this plastic 90-degree elbow that threads onto the main chuck and transforms it into a push-fit arrangement. This solves the valve core removal issues, but it’s also just another piece that can get lost. While the Micro Floor Drive is in travel mode, there isn’t a good place to store it securely – apart from maybe separately in a saddle bag. That’s how I’ll roll for the time being.

The pump’s party trick is its much larger digital pressure gauge. I mean, just look at it. At 8 cm, it’s about as long as my palm is wide. You do have to turn it on with a separate button, which can also switch between psi and bar – much like the SKS Airchecker pressure gauge I reviewed a while back. This one doesn’t have decimal places or a backlight function, though, and it runs on a much smaller CR1220 battery.

Quite unusually, it displays the pressure reading vertically. With the large numerals though, it does the job quite well. I later noticed that this digital pressure gauge is integrated with the hose, and is actually an upgrade part you can purchase directly from Lezyne. If you have an older Micro Floor Drive pump knocking around and want the fancy gauge, upgrading to it is as simple as screwing off the old hose and threading on the new one.

Inflating tires to 100 psi isn’t so hard, either. While the pump begins to fight back with resistance at 80 psi, being able to push your body weight into the ground with each pump stroke means faster inflation. You may want to keep your gloves on as you push in the narrow pump handle, though.

Finally, the pump comes with a bracket and a beefy strap to mount to your water bottle cage bolts in travel configuration. This entails pushing the pump handle all the way in and wrapping the hose around it, then folding in the footstep and screwing the chuck into the base. You then strap it onto the bracket. The larger size certainly lends it an old-school frame pump feel, but some planning and care is needed so the pump doesn’t get in the way of pedaling, or things such as a crank-mounted cadence sensor or power meter. I appreciate how the new colorway is much more incognito than the original chrome.

I understand now why Marco had his mounted on his bike for years. This thing is a bike commuter’s friend when punctures are a risk and committing to tubeless isn’t your jam. While this pump may not be able to eliminate punctures, it can sure improve your turnaround from them.

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