Have an alignment shop check BOTH the camber and caster...if either is out, then you're buying tires before their time...and when they're checking the specs, have someone, or something, about the approx. weight of the normal driver, sitting in the driver's seat...that way, you're taking into compensation the normal weight that the vehicles is having to deal with...along the same lines, consider the weight of gas in your vehicle...do you run the tank to almost empty before refilling? If so, then make sure the tank's half full...conversly, fill the tank to 1/2 your normal fill/re-fill point and put it on the rack...that will average the normal tilt your vehicle has to go through during a normal fill/re-fill cycle with the normal weight of the driver.

Good luck...

Also...have them check to be sure the bearings are snug to spec...I chased an alignment problem for months before I found out the king-nuts were too loose...tightened them up about a 1/16th of a turn...car drove like new and it held the alignment.

__________________

M. G. Burg
'10 - Dakota SXT - Daily Ride / ≈ 172.5K
.'76 - 450SLC - 107.024.12 / < .89.20 K
..'77 - 280E - 123.033.12 / > 128.20 K
...'67 - El Camino - 283ci / > 207.00 K
....'75 - Yamaha - 650XS / < 21.00 K
.....'87 - G20 Sportvan / > 206.00 K
......'85 - 4WINNS 160 I.O. / 140hp
.......'74 - Honda CT70 / Real 125
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“I didn’t really say everything I said.”
. . . . . . . . . . . . . . . . . . ~ Yogi Berra ~