I have a tire question, all it may be somewhat unusual and may even sound odd, I know it sounds odd to me. And I have been riding for many long years!
Ok, here is what I have seen. When I bought my NEW 2010 GL1800 “first owner” the tires where of course “new”. The tire pressures where checked and set, everything was perfect. Then about 2 or 3 weeks after owning it and already putting some 2,000 Km’s on it, the TPMS light came on one morning even before I got it out the door for a ride.
Both tires where something like 5 to 7 PSI low, not one but both…! Ok, filled it up and that was the end of that. Now move forward some 3 month and 15,000 Km’s of riding….gee how can you tell that I ride…just a little…LOL. Anyways I wore my OEM Dunflops, worst set of tires I have ever had on a bike…wore them out.
These were replaced with Metz 880’s and pressure was set to 43 PSI front and rear both the same. Now move forward about 2 weeks since the new tires went on…yesterday just before I went out checked the tire pressure front and rear. Both were 7 PSI…almost 8 PSI down….?
Ok the question…do these tires stretch or something when new….? I have never seen this before, but now seen this twice and ONLY with new tires with the first month of use…this 5 to near 8 PSI of unexpected and unexplained pressure drop for no reason that I can find, other then…the tire stretched under pressure, hence the pressure drop as the tire got a little larger after its stretch. If that is truly what is happening in the first place.
Can someone explain this uniform pressure drop with new tires….????