Low tyre pressure

[Jamieg285]

Any idea why I have one tyre that won't hold the required pressure? (30psi)

It doesn't go flat, but always drops to 25psi.

[EDGE]

could be the rim, you could have the tyres swapped around and see if it still does it

could be the valve, they're a couple of quid to have swapped at a tyre place, or the bead might not be seated 100%, could have a tiny nail in a tyre somewhere,

[HardRockCamaro]

I had a dodgy valve in the Cadillac that did that.

[FUBAR]

the IROC does that too, after winter last year one tyre had dropped to 16psi.

Luckily the 1st place I went @ a sensible pace was the BP station with an air machine because I know it does that (and I forgot to take a pump with me to where it was being kept)