Review on High-precision Digital Bike Tire Inflator Gauge - Auto-Select Valve Type (Presta and Schrader) for Air Compressor Tool by John May

This gas generator works perfectly with PRESTA valves without any adjustments. There are some reviews stating that this inflator does not work with Presta valves or that adjustments need to be made to the unit. All of this is not true. cartridge fits the valve perfectly; All you have to do is unscrew the top nut on the Presta valve and fully insert the cartridge so that the rubber fits snugly on the valve body. The digital pressure gauge reads the same as the analogue pressure gauges on the compressor system in my workshop. I am not affiliated with the manufacturer and do not receive any compensation from them. Get one!