First ride with new tyres

[GrumpyGregry]

I use a digital gauge because I'm forever pumping up my tyres with a variety of pumps, mine, his, that blokes, the one in the cafe, etc., etc..

 

[Cubist]

Bit of a pumper eh?

I got one of those Schwalbe/BBB digital gauges the other day and discovered that my track pump over reads by about 5psi at 25 psi plus, so can run my tubeless setup even lower now.

 

[02GF74]

The thing about track pump gauges is that they are measuring the pressure inside the track pump. The relationship between the pressure inside the track pump and the pressure inside the tyre is convoluted at best.

So regardless of the quality of the actual gauge, the result is too vague to be helpful

why do you say that? pressure is equal in all places inside any enclosed object. certainly for a shraeder valve that is open when connected to a pump what you say cannot happen, for presta the pump may read lower if the pressure insdie the tyre is higher and forcess the valve shut.

 

[VamP]

why do you say that? pressure is equal in all places inside any enclosed object. certainly for a shraeder valve that is open when connected to a pump what you say cannot happen, for presta the pump may read lower if the pressure insdie the tyre is higher and forcess the valve shut.

It's not exactly an enclosed object, though, is it? It's a system with valves and leaks.

I challenge you to set your tyres at, say 20 psi and 23 psi respectively, and repeatably, with any track pump. Not possible.