How do you measure tube pressure?
Mine (Humber Destroyer) doesn't have pressure relief valves so I probably have it softer than it should be most of the time, with the problem I have had I am paranoid about it going bang!
There is a sticker on the console saying the pressure should be 2-3 psi but I don't know how you can measure them - the design of the inflation valves means that you can't stick a gauge on - even if I took the inflation tube off the pump and made an adaptor to fit a gauge to the other end of it, it looks like the valves are forced open by air pressure from the pump and then close off after each stroke, so it isn't like a tyre valve where once the airline is connected the valve stays open until it is disconnected and you can measure the pressure with an external gauge.
I suppose once you get a "feel" for what the maximum recommended pressure feels like when you poke the tube with your finger then you don't really need a gauge but at the moment I don't really know what pressures are in them, I just sort of inflate it to "firm-ish" on the day but I think they should probably be harder than they are as they do move quite a bit when you hit the bumps!
Sorry another thicko question from me but there must be an obvious answer I am missing, how do you do this is there a special gauge of some sort that opens the pressure valve when you stuff it in the hole, or is it all just guesswork?
Edited to say I just did a search (ok ok I know ... I should have done it first...) - does anybody know how much the special gauges from Humber etc run at?
I still wish it had relief valves though...