[NeedAntiVenom]

Frank,

Thanks for the info - I'm running them at 25 now. I'll keep a close eye on then since they are so close to minimum pressure.

BiB - I haven't noticed any problem with balance since the pressures were dropped - I was concerned about that as well - but the physics are different between a tire with a static balance that is out vs. an out of balance cause by the tire deflection. Perhaps someone with more knowledge can correct or expand on this - but here is my stab at it...

For a static balance that is out, the center of mass will be off center and rotate with the wheel. This will create resonances with the suspension and tire itself that will cause it to shake as the offcenter force is alternately being applied positively then negatively in any given direction.

An imbalance caused by a rolling tire will also move the center of mass of center from the wheel rotation but since the deviation of the tire diameter causing the imbalance always occurs at the same spot - where the tire meets the road - the center of mass also does not move in space and results in no fluctuation in forces to the suspension elements.

I think this is valid for limited deviations of the tire surface, but for larger ones (i.e. very low pressures) I would expect some sort of resonant wave to form in the perimeter and sidewalls because the resonant frequency would be lowered due to the reduced force from tire pressure - just a wild guess on that one.


Thanks for the info, everyone.

Jim