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Discussion Starter #1
Or get new ones that don't come on till I get below 20 psi? TPMS stocks are keeping the idiot light on all the time since my rear tire correct pressure is now 22 psi.
 

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I don't think there's any way you can change it. Better solution would be going into the gauge cluster and removing the tpms light, or just putting a piece of electrical tape over the spot where it shines through. You'd have to remove the cluster to do this.
 

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@Boxcar are you now running low profile tires?
 

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Discussion Starter #6 (Edited)
I've got Toyo Eclipse http://www.toyotires.ca/tire/pattern/eclipse 205/70/15s on. They are the absolute largest diameter (26.5") tires that will fit. In fact, when new there is about enough room between the tire and front spring holders to get a thick piece of paper between, and they just slightly scuff the wheel well if I turn fully left or right.

The correct inflation for a tire is directly related to the load upon it. Since the 205s are designed to handle double the load I have on them I must reduce the air pressure to keep the centers from wearing thin before the edges.

I've gotten used to the light being on all the time. It doesn't bother me, but would be nice to have the warning indicator for when I really need it. 26 psi front and 22 rear (unloaded) seems perfect for getting even tread wear. I'm due for a new set this fall but if they go on sale I might jump on them sooner.

For anyone wondering why, I'm getting more overdrive (approx 8%) with the larger diameter tires. It's not much but it's better than nothing. Wish I could get 3.0 final drive gears, and do a mod to the 6 speed tranny to lower the first and second gear ratios. Nissan did NOT engineer enough overdrive into the 6 sp version. The CVT delivers 27% more overdrive than the manual 6 sp.
 

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still seems like hardly no pressure to me but you seem to have crunched the numbers and found what works.

Maybe the dealer can change the value. I heard that they can but they won't.
 

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Discussion Starter #8
Yeah, they get squirrely when you want to do something that isn't in the book and might possibly get them into trouble if something goes wrong.
Lots of tire dealers around here are starting to insist a new pair of tires MUST go on the rear due to hydroplaning of the old lower tread depth tires if they are on the rear.
 
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