FOX High Pressure Digital Shock Pump


Introduction by Francis Cebedo

Brian and I both have this pump and have been spending quality time with it. In this day and age, suspension setup is everything. Bikes are supposed to be ridden with the right amount of sag for a given rider. And this can be the difference between an all-mountain bike riding well or not.

Brian does an excellent job describing this tool (as he always does). But I’ll add to his assessment with a key strength and weakness. The key strength is it’s deadly accurate On the old gauges, it’s hard to tell if it’s 62 psi or 64 psi. On this guage, you will know that it’s exactly 62.5 psi this time and every time you set up.

And a weakness is obvious but I’ll say it anyway. It needs to be turned on every time. Where the old pumps have a needle gauge and they’re always working, This digital pump needs to be turned on every single time you use it.

If you care about suspension setup and want repeatable psi readings, this is a good tool.

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Review by Brian Mullin

Have you ever hooked up a shock pump, and then looked down to check the pressure reading and found it difficult to ascertain the exact value? Not only can it be tough to decipher the actual number, but the scale is so jammed up on the gauge, that precise measurements are almost impossible. Standing there several feet over the small gauge exacerbates the issue, as does eye strain and poor vision (like getting older). Enter the perfect solution, the FOX HP Digital Pump.

This is an easy to use high pressure pump, which has a simple readable digital gauge, with a large numerical LCD readout. The gauge can show in four different pressure scales, and has many excellent features; the foremost is the superb bleed button that allows precise air pressure adjustments. I have thoroughly enjoyed using this device over the last several months, and it has been incredibly useful and functional for making suspension pressure changes in my vast array of test shocks and forks.

The FOX Digital High-Pressure Pump is constructed with an alloy body, and has an alloy pump handle, a large plastic digital gauge, and a swivel mounted rubber hose with a Schrader valve connector and an air bleed button. The LCD digital gauge outputs in four pressure scales: psi (pounds per square inch), bar (100 kPa- from Greek baros meaning weight), kg/cm² (kilogram-force per square centimeter), and kPa (kilopascals), the latter is the SI (International System of Units). It reads up to 300psi in small increments and retails for $70.

Features and Impressions

The extra long Schrader connector makes it easier to connect and thread onto forks and shocks, which is especially nice on finicky valves and those that have deep recesses. It always drive me batty trying to attach up a simple pump to a Schrader valve, and more than a few cuss words have been tossed out of my mouth using the standard variety connector. The hose swivel makes is handy to get the proper angle for reading the gauge and attaching the connector, and it also extends the life of the hose since it’s not bent at odd angles, and therefore the rubber isn’t repeatedly pinched and crimped. After three months of use, the swivel has been bombproof and hasn’t leaked or shown any signs of wear. The swivel rotates 270° around its connection point, and stops up against the gauge housing at its maximum rotation. The hose is flexible enough to squiggle around things, yet its thick enough for durability and robustness.

Strokes required by each pump to reach a specific psi

Adding air can take a longer time at higher pressures as the pumps chamber is narrow so you can’t produce a lot of volume for each stroke. On the other hand, this allows delicate adjustments of the pressure, so small and precise additions can be done. The stroke was nice and smooth while pumping the handle, and I didn’t have any issue bringing my rear shock up to 150psi.

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About the author: Brian Mullin

Brian likes to push the limits in all the sports he obsesses in, whether it's mountain biking, whitewater kayaking, skiing, or sport climbing. He takes those same strengths and a good dose of insanity to his reviewing and writing on mountain biking products, creating technical, in-depth articles. Whenever he's not on the bike, he might be found watching MotoGP racing, otherwise look for him out on the trail.

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  • Bog says:

    This is the same pump as Rock Shox is using. I find it tough to use as the pressure (and pumping force) go above 200 psi in a read shock because there is really nothing to hold onto besides that small thumb indentation. If you hold higher up on the handle you risk damaging the gauge or hitting the bleed button.

    • Rich says:

      The biggest issue I have is realizing exactly how much pressure is lost when disconnecting the unit. How does this pump differ?

      • Brian Mullin says:

        Rich – I updated the article on the subject: “Like most any pump, there is always a small of amount of air that lingers in the hose, so that when you disconnect the pump, that air is lost in the total relationship to the shocks pressure and the gauges last reading. The gauge measures a total pressure value of x, which is a combination of the shocks value of y along with the hose value of z. I found the value of the lingering air in the hose to be between 2-4psi (or more) on this pump, which depends greatly on how you disconnect the Schrader connector. Again, the lost psi during disconnect is meaningless if you are always using the same method for checking the pressure: connect, pump or bleed to your designated psi, disconnect, check sag if needed, repeat. Once you have defined that 95psi is the sweet spot for your pump, your done.”

    • Brian Mullin says:

      Bog – At high pressures you need to resort to grasping the pump with your hand, and the use your index finger on the end. It was easy not to touch the bleed button or gauge. I tested pumping four different pumps the other night, and they all required the same technique.

  • ginsu says:

    Little trick to prevent excess pressure loss when removing a Fox pump. When disconnecting the pump push the handle down at the same time so the air pressure is pushing out air, thus preventing as much leakage. Seems to work for me.

    But I agree the pumps should have a seal near the head so you don’t have to fill the hose with your tire during disconnect.

  • Ted says:

    can you help me how to replace battery pls? Thanks!

  • johnG says:

    Has the non replaceable battery been addressed…..if not this is crazy as I’m returning it for a refund…

    Seriously wtf?

  • dana says:

    johnG just today i was in contact with fox with respect to the inability to replace the battery and via email was informed a new model is due out by march 2015 and after voicing my displeasure about a $70 pump getting binned soon as the battery icon is flashing I was pleasantly informed fox would gladly replace it under warranty with the new model when they become avail. Time will tell how it plays out.

  • RichyK2000 says:

    Hi all, I can confirm what Dana has said. Following this thread I contacted Mojo who are the Fox distributors here in the UK. No quibbling, I send it back to them and they send me a new one as soon as they come into stock in August. Excellent service form Mojo and Fox.

  • George Tate says:

    Hi ,in regards to the battery going flat as mine did and then having to maybe get a new one after reading that the battery is not replaceable I decided to open the gauge and found that the gauge was only glued together and found that it had a 2032 disc battery inside so I put a new one in and now it working like a new one.

  • Alec says:

    Thanks George Tate! I was able to do the same. Takes a bit of careful work to pry it open but once you get one corner done, the rest will follow. Now off to buy a CR2032 battery.

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