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post #29 of (permalink) Old 17th September 2005
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They definitely have a problem with low temperature, but only because it actually drops the pressure of the tyre (Boyle's law, I think.)

Mine's been complaining about both rears on the cold mornings we've been having lately, but on the trip home of an evening, the system has reported no problems. They were a bit low though, and I put them all back up to the correct pressures this morning.

If you have the system that displays the tyre pressures, and you either have the warning displayed or are lucky enough to have one with the 'quirk' that lets you display tyre pressures while driving, then you'll see that the tyres can easily pick up 3-4psi just from the heat generated by a good motorway run.

Edit: I think there's also a problem in very cold conditions that's related to water inside the tyre freezing in the sensor.
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