We were having some rear inside edge tire wear. This stated with the camber at -1.9 degress and with rear toe in the .16 inch in arena. We reduced it to
-1.6 degress and .12 inch in toe setting and still had some wear but not as much or as fast. We are now at -1.3 degrees camber and .10 inch in on the toe. This appears to be working well as there are no visible signs of wear yet.....knocking on wood. Stock spec ranges are -2.3 to +0.3 degrees for rear chamber and 0.08 to .18 inches in for rear toe. Keeping that rear toe down is just as important as the rear camber spec for maximum tire life. And please note, lower camber and toe settings will have minimal impact on handling for street driving. Maximum handling performance can be increased by going with more camber and and toe out but with cost to tread wear. Excessive amounts of either is not needed for street driving.
To reduce the camber to the specs I indicated, we needed and installed rear camber bolts.