07-23-2012, 10:14 PM
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#1 (permalink)
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A True Z Fanatic
Join Date: Mar 2009
Location: North East
Posts: 6,203
Drives: 09 370Z Sport M6
Rep Power: 655
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Quote:
Originally Posted by Matt_370Z
Thank you guys for the responses and I'm glad I asked. I read through the manual a little quickly and figured it was talking about the tire's recommendation (not the label inside of the door which I assumed was for base model tires). It just seems counter intuitive to me to inflate a 51psi max tire to 35 but that explains the TPMS warning when it's <30. A quick little trip to the garage and I'm now at 35 even... Thx again.
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The 51psi max is the maximum pressure for the tire under maximum load. Tire pressure is increased with load to reduce heat build up in the side wall due to tire flex. To operate the tire at max load you would have to carry about 2500 pounds in the poor Z, or be running continuously at 180 mph, neither of which is possible 
The manufacturer's tire pressure recommendation on the other hand is an every day tire pressure for the tire operating at average loads with average speeds (highway speeds), this is the one that you want to follow.
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