Topeak SmartGauge D2 Digital Tire Pressure Gauge – Presta/Schrader Compatible, 250 Psi/17 Bar, Precision Air Pressure Reader with LCD Display for Bikes, Motorcycles & Sports Equipment

This gauge works well. I would like the head to rotate 360 degrees and for the display to retain information for longer as well. Otherwise, it's super handy to have around. Love being able to switch between valve types. It reads accurately compared to a high-cost automotive gauge.

It worked the first time.The second time it didn't show any pressure. I turned it on and off many times, and it started working, so I guessed that it's Ok.Third time it only showed Zero and no pressure at all while I tried every button on it.The last thing I did hopelessly was removing the battery to reset it, but the battery cap is almost impossible to remove peacefully (!), but I heard a few beep which signaled me that it has been reset.Now it works perfectly and accurately, and I hope it will last long.

In an effort to put more miles under my legs, as well as save on fuel costs, I've been riding my mtb to the trail head.For this 20 (give or take a few) miles round trip, I obviously would prefer a higher psi to reduce drag on pavement. Once on the trail, I prefer the lower psi for better traction and over all feel.Rather than using the "pinch" test and trying to guess what my psi is, I decided to splurge on this.Am I glad I did.Now, I know exactly what psi I'm running and this allows me to get the ride dialed in. As any decent mountain biker knows, if the psi is too high you sacrifice handling. If, on the other hand, the psi is too low, you risk damaging the rim.(And yes, I know all about tire inserts but I prefer my simple tubeless set up with a good sealant)Also, it turns out my trusty Park Tools floor pump gauge reads 4-10 psi too high! So be careful if you're one of those people who like to max out on tire pressure for road riding and use your floor pump gauge. You just might be OVER INFLATING - which can lead to the tire blowing off the rim at the worst possible time (such as a fast decent).Some tips for those on the fence re: digital gauge:1) Buy one. It doesn't have to be this particular brand. Just do your due diligence and get a reliable gauge. You will not regret it and you will be able to dial in your tire pressure for any given ride. It really does make a difference. Remember - the tires are the only part of the bike that is in contact with the road or trail.2) Keep the instructions! Another person stated this in the reviews and I agree. There is a very specific way to keep the valve in the gauge, bleed air, and check what the adjusted psi is. Read the instructions.3) Every time you insert and remove the gauge for a check, you may lose about 1 psi.4) I put clear tape over the screen so as to protect it from scratches. I also carry it in a protective case to prevent it from getting damaged.5) My one gripe - and the reason I give it four stars - is the plastic is too soft. When I used a quarter to remove the back plate for installing the battery, it left two small "dents" on opposing ends. My fix for this is to use a thin piece of cloth to cover over the slot, let the quarter push the cloth in for a snug fit, and use the cloth to cushion the pressure needed to open the plate.Overall, I'm glad I bought this. I just wish I had known about the cheap soft plastic. Hopefully, this will help any future owners.

This thing is so handy. It's a great gauge you can even use on your car. Screen is very readable. I just got this so let's see about it's durability.

Easy to use, works on both types of valves. One small tool does it all.

When my Toppeak analog gauge finally fell apart after over ten years of heavy use my first thought was to get one exactly like it, but I was attracted to the feature on this gauge which allows you to release tire pressure while reading it as it drops and the fact that it has a single hole head which is compatible with both Presta and Schraeder. Months later, I couldn't be more pleased with this gauge.When I look at the gauge on my Lezyne Alloy Floor Drive Pump as I'm pumping up the tires the gauge on the pump is fairly accurate, but you can't increase pressure by only a pound or three, and you can't decrease pressure with it at all. So when I overpumped the tire--as on most any floor pump--I would have to remove the pump from the valve, take a wild guess about how much air I should let out, and repeatedly use my old analog gauge to check it until it was roughly the pressure I wanted.With this gauge I always put more pressure than I need in the tire, then remove the pump, measure the pressure--which is too high at that point--then press the button to measure the pressure as I use the release button to get it where I want it.This would be a pain in the butt if it weren't for the swivel head on the gauge which allows me to point the display where I can easily see it rather than change the position of the tire or tilt my head to view it.Overall this process has become quicker, easier, and more accurate due to this gauge. And it's a great benefit to other riders when I'm on a club ride or volunteering as a ride marshal in a community bicycle tour that with the flip of a switch I can change between Presta and Schraeder valves without having to take it apart or switch around any gaskets.A lot of people will tell you that you don't need a gauge, that they can tell just by squeezing the tire. That's nonsense. I used to think that until I finally bought a gauge and found out that when my mountain bike tires feel rock hard by the squeeze test they actually have only about 25 psi in them when they should be at least 50 psi, and my road bike tires might feel rock hard at 60 psi when they should be 120 psi. For reference, your car tires only take about 35 psi.And by the way, this is a great gauge to use on your car too. I check the tire pressure on my car at least every month, and more often when the seasons are changing. Sometimes I need to put more air in using the electric pump on my Slime 50051 Safety Spair All-In-One 36 Piece Roadside Emergency Essential Kit and sometimes I need to let out a pound or two of pressure. With this gauge, I don't have to guess how much air to let out when the pressure is too high, checking each tire multiple times until I have it right, or use the needle on the analog gauge to get an approximate pressure reading.Whether on my bikes or in my car, inaccurate tire pressure can mean compromising fuel/power efficiency or traction, and with gas prices what they are these days even another three miles per gallon matters in my car, and incorrect pressure in bicycle tires make for a harder ride and lower endurance.So instead of thinking that maybe this is a little over the top, I recommend you buy it. The price is certainly reasonable and I doubt you will regret it.

Simple, easy to use and pressure bleeding button makes it easy to set the exact pressure