Feel free to evaluate this sensor while you work at my uncle's tire shop between high school and college during the summer. Seen, owned and used many types over the years. For the range I need, this is perfect. Have a couple of karts and small mini bikes that require readings around 15-22psi. It lies in the middle of this tool palette. For sport bike owners. The 30-40psi range seems very accurate (compared to my best gauge). Features a high-impact rubber cap, 1/2lb pitch, and check valve (knob) to hold maximum reading until cleared. They offer same track width with square head (RA60X?), better for dual disc wheels.