Quote:
Originally Posted by audio1der
Interesting thread. I spoke with a rep at Tredit who make our A162 wheels and he confirmed by email they would safely take 65psi/1900lbs.
But when we received our Kumho radial 857's, the wight rating is max'd at 69psi, not 65. The tire shop who swapped them inflated to 69.
While installing our TPMS sensors (I'm a safety geek) each tires settled to 68psi cold. They rose to 76/77psi on the sunny side while driving. It occurred to me that is measurably higher than Mr. Tredit told me was safe.
We are well underweight for all our suspension and tires- I'm thinking if we start at 67/68psi it will rise to whatever it wants to rise to and we'll be fine.
Am I off base?
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Based on my understanding of the SAE testing, your 65 psi rated wheels were probably tested around 70-75 in order to obtain that rating. The wheel manufacturer will not tell you it's safe to run more than the 65 they are rated at. In my mind, knowing they were tested above that, the big question is how long will they safely hold up to higher pressures? I don't know the answer and I doubt you will find anyone who will tell you, even if they know.