So not true! I'm 120 lbs and can not for the life of me get certain pumps to go up t 120 psi! I do 120 b/c I kn0w I'll l0se (stupid O key nt always wrking nw) abut 10 psi when i take 0ut the pump. plus, I've laid n the ne at my mom's and can't get it t g past 100 psi. I used ne at a stre and culd just barely get up t 110, had t have the guy d0 the back wheel, felt a right idi0t!
If you're only 120 lb you don't need anywhere near 120 psi, even if you are loosing 10 psi (seems a bit much to loose 10 psi) by removing the pump which is hell of a lot you would be fine with 100 psi. I'm a simg over 11 stone and have never had any problems with 90 - 100 psi on 23 mm tyres over 1000's of miles and on 28 mm tyres my pressure is lower still.
If you're only 120 lb you don't need anywhere near 120 psi, even if you are loosing 10 psi (seems a bit much to loose 10 psi) by removing the pump which is hell of a lot you would be fine with 100 psi. I'm a simg over 11 stone and have never had any problems with 90 - 100 psi on 23 mm tyres over 1000's of miles and on 28 mm tyres my pressure is lower still.