Thanks for the great info. I use to gauge my tires by feel, but was afraid of adding too much air and blowing them. My Bontranger tires max is 60, and I could believe how much more air I needed even after the tires being super tight when I finally started gauging them. Also FB I tried taking just the top part off and it still didn't work. I'll just chalk up a $5.95 loss. Yes I think I'll get a better quality from the GH Meiser and Company gauge. Thanks a bunch guys. Stay safe.