On Sat, 6 Dec 2003 17:17:36 -0500, "Gary Warner"
wrote:

We're thinking 400 lbs tongue, so a little less than 10%
tongue. Tires are 14" radials.

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For what it's worth, we ended up a tad over 10% on the tongue weight
and a little extra air pressure on both the trailer tires and rear
truck tires (+5 PSI). With that combination it was rock solid at 75
mph on smooth road, with minimal cross winds. Before the adjustments
it started getting scary just over 55 mph.