Quick PressureTire Pressure Monitoring Valve Caps Sensor Gauge - Advanced Detection System, 32 PSI Sensing Air Alert Indicator for Cars, Trailers, Bikes - Chrome-Plated, Pack of 4

Did not like the 'finishing's' of the product (rough), but works well. Interesting is, i have a tire with a little leak and despite I have inflated the tire back to the normal pressure, just because the tire loses air slowly, the valve pressure indicator shows half red/half green. And to confirm that, I changed with another one, and the same result. So... if you have a leak, even small one, even with the normal pressure, the valve indicates that pressure is low.

The brass chrome plated monitors held up well (The plastic version fell apart) and did their job. The only drawback was taking them off an using regular caps in a car wash.

Just wanted a quick view of the air pressure in my tires. These seem to work but are a little hard to read due to the small visual area. I have short valve stems which positions that area inside the hubcap. Next time I get tire work done I guess I'll go with longer stems!

You know, it is such a great feeling to be able to get up, head out the door, walk around the car, and, head out to work not having to worry about a nail that I didn't know I might have picked up yesterday, or, the day before. Also, I am happy to see that my tires are holding air. No slow leaks. The only thing you have to watch for is the tightening process as you seal the gauge down on its' o-ring. Make sure you get a good grip on the rubber valve stem, especially an older one, with a tool and padding that won't cut through the stem, or, tightening can twist the stem in its' rim slot, and, it may spring a leak, albeit a slow one. Learn from my experience.

The caps work great but with one BIG problem. When you take them off to put air in the tire, you have to be really careful that the little black o-ring stays in the cap and is not stuck to the valve stem. If it is stuck to the valve stem you need to peel it off the valve stem and put it back in the cap. Because if you lose that teeny, tiny o-ring, the valve cap is worthless and you can't buy any new little o-rings, you have to buy a whole new pack of 4 caps! This has happened to me several times. The last time at the tire dealership who let me with 2 flat tires within an hour because they didn't know about the little o-rings that stick to the valve stems. So now I'm buying my third set of 4 caps but fortunately, this time the tire store is paying for them. I've emailed the company three times now over several months asking them how I can buy the o-rings or just tell me what size they are and I'll buy them someplace else. I wouldn't say the customer support is terrible, I'd say it is NON-EXISTENT! Not once did they respond in any way to my emails. So the caps are good, but the o-ring and the company are bad.

I purchased these tire pressure gauges about a month ago. I've used other on-valve stem gauges before, and these seem much better made, and likely to last longer as well as not crack. The not cracking point is important. Because these and other on-stem pressure monitors work by pressing open the valve in the tire stem, even a very small crack will cause the tires to deflate. Finally, they do what I purchased them for: letting me know if I have a low tire.

I had to send these back because they just would not work correctly on my Toyota. They simply do not have enough threading. The company though did not give me any guff on refund and they might be fine for a TWO Wheeler.

Works as expected. Not odd pressure friendly such as 33/35 PSIG required by Toyota Prius, etc. with odd pressured requirements.