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

Absolute Accuracy and Zero Frustration
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.

Flakey after 1.5 years, broken at 2 years.
The Topeak SmartGauge D2 I purchased worked well for about 18 months. I used it exclusively to measure pressure on Presta valve high pressure road bicycle tires. At about 18 months, the gauge began to stop reliably displaying pressure, taking 3 or more tries to get a readout. Also, the pressure adjustment button periodically would fail to relieve pressure. Nothing would happen when pressing the button. This was independent from the “display fail” problem. On any given try, the gauge might work as expected, or it might have problems getting a reading, or it might get a reading but not release air when the relief button was pressed. In other words, it became an unreliable faff. About two weeks ago, 2 years & 2 months after purchase, the valve select lever broke, causing the gauge head to massively leak air when tryin to take a reading. Basically, the gauge was non-functional and I threw it away.I assume it was accurate but have no means to gauge accuracy given I didn’t have another “known to be accurate” gauge for comparison. I liked the large, easy to read display but I would have liked for the gauge to have lasted longer. I’ve replaced this D2 with Jayco’s MBX-60 gauge. Though the MBX-60 uses a more difficult to read (for me) dial gauge, the old-school dial pressure gauges tend to be more reliable because they’re simpler. For contrast, I bought the Topeak D2 to replace a dial gauge I bought in 1988 and that I had to finally retire because the seals were shot and could not be replaced. The Jayco MBX-60 is very similar to my previous gauge from 1988. I’ll see what kind of performance/longevity I get from it.

Ottimo prodotto!!Usato sia per mtb. E bici da corsa.La lettura risulta essere precisa e affidabile grazie anche a l’ampio display lcd,Che ne facilità l’utilizzo.La pressione può essere letta in bar ma anche in psi,Tramite la pressione di un apposito tasto.Molto comoda la funzione che permette di monitorare in tempo reale,L’esatta pressione Della gomma, mediante la pressione di un tastino gialloChe sgonfia la gomma a step di 0,1 bar, permettendoci di raggiungere,L’esatta pressione desiderata.Tramite un apposito tasto a scorrimento, posto sulla testa del misuratore,È possibile inoltre selezionare il tipo di valvola, presta o schrader.Molto comoda inoltre la funzione, che permette di ruotare la testa del misuratore,Per meglio adattarla alla nostra gomma.Che dire, ottimo prodotto, affidabile, preciso,Consigliato a chi come me, voglia avere sempre a portata di mano,Un accessorio per le nostre bike, preciso e indispensabile,Durante le nostre uscite.Un ringraziamento ad Amazon, per la sua solita, ed ottimaGestione della spedizione, e comunicazione sul prodotto.

微妙な空気圧調整が手軽にできるのはありがたいです。とりわけロードはチューブレス化によって空気圧の要求がシビアになりました。barでもPSIでも測定でき、出発前に調整することで、ロードの乗り心地とパフォーマンスが格段に向上しました。MTBでトレイルを走った経験は少ないのですが、高圧のままトレイルを下ると、バランスが取りづらく転倒しやすくなります。このエアゲージは操作がシンプルで扱いやすいです。スポーツバイクに乗るなら、絶対持っておくべき機材だと断言できます。

Will easily inflate my road bike tyres several times, great product