ACPOP Bike Pump with Gauge - Fits Presta and Schrader - Accurate Inflation - Mini Bicycle Tire Pump for Road, Mountain and BMX Bikes, High Pressure 150 PSI, Includes Mount Kit

It is built nicely, but doesn’t fill the tire as quickly as expected. It feels like I’m adding air to the tire, as the pump becomes more difficult to fill pump and the gauge shows air pressure goes in, but the tire doesn’t feel and harder. I’m still using my dedicated machine I use for my car tires, which definitely fills the air - and my external air gauge shows the added air/pressure in the tires.

Unit arrived today. I need it for my two MoPed-like scooters. I ran the following test: 3 x 8 inch tires already at 30PSI. hooked up pump to raise to 40PSI. It took almost 1 minute of vigorous pumping to get from 30 to 40 PSI That seems like a lot of work for a small tire. If I had a mountain bike with a flat, that would roughly translate into 12 minutes of vigorous pumping to go from 0 to 40 PSI. Of course better than being stranded on the trail.The accuracy of presure gauge exactly matched my digital talking tire gauge with several inflates and deflates. Very impressive. I love the rubber hose. I could not hold unit to the ground and pump without the hose. Unit looses 2.5 PSI in the fast removal of hose and schrader valve. Tested many times and very repeatable. I have a professional tire stem extender. It looses 1.0 to 1.5 PSI in unscrewing the valve. Also very repeatable.So this is a great little product. Wished they hand made the barrel 2 inches longer. That would have increased the pumping rate by 20-30%. A very significant factor. Dr. Ted Cooper Amazon

Everything is fine but due to its' small size, you have to pump it A LOT to get your tire full.

Would not recommend this pump. You will be on the trail pumping for hours just to get one pound of pressure

The BEST mini bike pump is a little different from most found on the market, and in a very good way. a flexible hose that connects the pump hardware to the tire's stem/valve, allowing a few inches of give while pumping, and making that job much easier. flexible stem is stored away inside the pump's body, making the pump look very sleek, with nothing dangling off the side. the built-in pressure gauge that exposes itself from a hide-way space

I tested this thing on road bicycles, cars, and even on off-road hoverboard and the PSI is so accurate. It's strong and holds at least up to 100 PSI maybe up to 120, but you only need a 40-50 if it's for a mountain bicycle or a bike. Valve switching is the fastest I have ever used. Everything is right there, so compact and worked well.

I ordered this a long time ago and never once have I got a correct reading from this pump. Stopped using this pump after getting bizarre PSI reading on it 3-4 times in a row, absolutely useless piece of junk.

Very easy to use and I like that both types of valves can be used without having to take anything apart as I've seen on other pumps. The pressure gauge is very helpful. My bikes seems to ride smoother now that I know how much air I"m actually putting in the tires.