Review on 🚴 JACO BikePro Tire Pressure Gauge - 160 PSI (Road Bike & BMX Series), Presta & Schrader Air Chucks by Bob Walters

A product that really works! I have used a Shrader chuck for testing car tires and a Presta chuck for road bikes. No tools are required to change cartridges; Simply turn the threaded chuck with your fingers. Both chucks allow you to quickly measure air pressure WITHOUT losing a lot of air when installing or removing the chuck. Without lab quality instruments, I cannot vouch for absolute accuracy. But I did some basic testing. When I inflated my bike tires to 100psi using two different floor pumps with built in gauges (Bontrager and Topeak Joeblow), I found that one pump was consistently 4psi and the other was 1-2 pounds per square inch of vacuum. Using the TPM (Tire Pressure Monitor) on my 2018 Subaru Crosstrek (which reads all 4 wheels independently) I found that the TPM reading on all 4 wheels was 2psi lower when the tires were inflated to 35psi with a pressure gauge. This gauge claims to be calibrated to industry standards, so I trust it. more floor pump and TPM readings. For my purposes I give this product a high vote of confidence.