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Originally Posted by GenKreton
How well do you trust the material suppliers? A lot of that factor of safety is involved because in consumer fields you engineer to mean life failures of materials and nominal strengths, depending. Going over the rating is fine, but not that far over.
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yes, very valid (and I've thought about this).... I'm at 55psi on 44psi tires. That .25% over rating. Lets assume the FoS is 4 (which was the lower end for the tires of yore). .25/4 = .0625... So I'm 6.25% closer to failure by pressure. It's over, bu not really
that far over
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here are two examples of center wear due to high pressure, and as diesel_john points out (like i said earlier) there is more affecting the wear than just pressure. it is very much on of those things where "results will vary by user".
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In both of those cases, the pressures weren't given :/ I think I've said it once already - always go with what you're comfortable with... Check for wear frequently :/ NHTSA/FMVSS has some good stuff on this subject such as hydroplaning speed
Hydroplaning speed = 10.35 x sqrt(inflation pressure) <-- there's more methodology here, just a cool little tidbit for relative comparison