View Single Post
      11-20-2011, 10:15 AM   #45
Lotus7
Major
United_States
67
Rep
1,041
Posts

Drives: xxxx
Join Date: Dec 2010
Location: xxxx

iTrader: (0)

Looks like your initial settings were not really far enough off to be causing the tire wear you were seeing, especially at the front. The setting tolerances are very tight, but a camber change of -0.1 to -0.4 (LF) and -0.7 to -0.5(RF) is really insignificant. The rear camber changes are slightly more significant, but still not major changes. The settings of -1.4/-1.5deg. on the rears will slightly improve handling at the cornering limit, but will have little effect in normal driving and may actually increase the inner tire edge wear.

The front caster settings mostly affect steering feel and self-centering at high speeds and changes of one degree or so will have little or no effect on tire wear. the reason they didn't get the caster setting exactly the same is because they're set with a combination of adjustments and the installation of "shims". This limits the "resolution" that can be achieved. In addition, removing the vehicle from the alignment rack and then re-installing it will give different indicated readings. The repeatability of the measurements has a wide enough error range that there is no point in trying to make very fine adjustments.

Hope your tires wear better now, but from the measurements, especially at the front, there does not seem to be an "alignment-related" reason for such severe wear. Of course, I'm no expert, particularly about small alignment errors and their interaction with run-flat-tires. The much stiffer sidewalls may make them much more sensitive to tiny alignment errors. Who knows?
Appreciate 0