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Mazda CX-9 Tires and Wheels

70 messages,  Last post on Mar 11, 2009 at 10:49 AM

You are in the Mazda CX-9 Forum. Your Hosts are steve_ & tidester

What is this discussion about? Mazda CX-9, Mazda, SUV

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#68 of 70 Re: It was these rims... [ceric] by tidester HOST Mar 07, 2009 (1:31 am)
Replying to: ceric (Mar 06, 2009 9:51 pm) A good rule of thumb is that the pressure changes by about 1 psi for every 10° F change in temperature.   tidester, host SUVs and Smart Shopper Replies to this message: vermonter (Mar 11, 2009 5:17 am) tidester (Mar 11, 2009 10:49 am)
#69 of 70 Re: It was these rims... [tidester] by vermonter Mar 11, 2009 (5:17 am)
Replying to: tidester (Mar 07, 2009 1:31 am) Thanks for the calculations, very interesting. We are vigilent about monitoring our tire pressure and rely on a handheld digital gauge. Do you think the impact of the sun on the sidewalls, when parked, could increase the temp enough to account for the TPMS light turning on and off?   I'll reiterate that this only seems to happen when we have extreme temp fluctuations and is not an every day occurence. The dealer as well as a local garage said that TPMS often give false alarms in the colder winter climates. Replies to this message: tidester (Mar 11, 2009 10:49 am)
#70 of 70 Re: It was these rims... [vermonter] by tidester HOST Mar 11, 2009 (10:49 am)
Replying to: vermonter (Mar 11, 2009 5:17 am) Sunlight will certainly heat up the tires though the heat transfer would likely be more via the metal wheels/rims as opposed to the sidewalls.   I can't say whether that is sufficient to trip the TPMS but those systems are supposed to be designed to deal properly with changes in ambient temperature. It could be that the threshold for triggering the lights is overly sensitive or the TPMS itself is defective. It would be interesting to know whether others have experienced this problem in other geographic locations.   tidester, host SUVs and Smart Shopper

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