Originally Posted by
alahol2
I pumped up my tyres using a thumb gauge to 'rock hard'. Measuring that pressure with a car tyre gauge shows 40psi.
?
Forgive me if I'm wrong, but many cheap tire guages only go to 40-45psi since cars typically run in the 25-40 range (with heavier duty cages in the 50-60 range). It is possible that your gauge is getting thrown as far as possible and you could be way past 40.