Hi
Much Time has passed since my last contribution about tyre pressure loss but even at 87 I have had another thought on the matter.
Spoked rims use a sealing /protection band to stop the spokes puncturing the inner tube.
This could act as a seal over the spokes and trap some air for some time between the tube/tyre/rim when a new tyre is inflated and give a false reading until the trapped air leaks past the protection band, through the spoke holes.
The protection band could easily seal in the trapped air for several days/weeks and result in an apparent slow deflation.
I have noticed that after a few days the pressure loss gets much less - and in fact my Comet's tyres have not needed to be pumped up for about a year now that things have settled down.
While having the problem and having bought new tubes, valve seals etc with no improvement over a few months, I have now concluded that the pressure loss must be due to air trapped between the tube and tyre and leaking slowly away.
Much Time has passed since my last contribution about tyre pressure loss but even at 87 I have had another thought on the matter.
Spoked rims use a sealing /protection band to stop the spokes puncturing the inner tube.
This could act as a seal over the spokes and trap some air for some time between the tube/tyre/rim when a new tyre is inflated and give a false reading until the trapped air leaks past the protection band, through the spoke holes.
The protection band could easily seal in the trapped air for several days/weeks and result in an apparent slow deflation.
I have noticed that after a few days the pressure loss gets much less - and in fact my Comet's tyres have not needed to be pumped up for about a year now that things have settled down.
While having the problem and having bought new tubes, valve seals etc with no improvement over a few months, I have now concluded that the pressure loss must be due to air trapped between the tube and tyre and leaking slowly away.