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In my case, I've run nose tire pressures as low as 25 and as high as 40 psi and have yet to experience any shimmy - EXCEPT - that once with low pressure I got a little "bump" during landing. Investigation revealed a deep scallop off-center of the tread.

Also.. The lower tire pressures cause excess flexing of the tire and tube sidewalls, and once led to a flat tire while "on the road," which was a major pain (the tube was cracked around both sidewalls).  When I got home the other two were replaced, and they also showed signs of cracking.

The plane rides better with lower pressures, but wear better with higher pressures.  I've settled on 30-35 in the nose and 40-45 in the mains, and I now get excellent wear with no shimmy.

Pete Cavitt - N320PL
206-953-9403

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