2.5 degrees negative camber is not within spec. You need new control arms in the rear. These will set your camber back to the factory setting and reduce your tire wear on the inner edge. The first shop you went to is correct, the camber cannot be adjusted, components must be replaced to rectify the excessive camber. Ive done a couple of New Style C70 rear control arms for this very reason, if your vehicle is under warranty however, the dealer needs to be able to prove that the car needs it. So if you dont have wear on your tires and when the toe was set it readjusted the camber (when you adjust toe it affects camber and caster measurements) then they cant prove to Volvo that it needs the control arms. I hope this helps
I have the same exact problem with my 2008 C70, excessive rear tire wear, needs new tires and "Wheel Alignment" about every 5000 miles. How do I remedy this with the dealer so that I can get the control arms changed under the warranty? Thanks, Joe
On new c70s 20000 miles is considered good tire life. An alignment issue can be verified with an alignment machine and test drive. The low tire life is attributed to advanced braking and traction control, a short distance from front to rear tire and the engine/convertible weight. I have seen increased tire life by going with a more 'rugged' tire, however this will increase road noise. Yokohama or Goodyear are a popular choice.
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2.5 degrees may not be within normal specs, but it is within specs for a Volvo C70. Going through the frustration of that now.
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I own a 2005 S60R AWD that has the same problem, this is a common problem with many of the Volvos, the only thing that I could find for the AWD models is an offset bushing kit provided by IPD, it allows up to + or - 1.5 degrees,
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