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Well, I tell you what, it's gonna be a tough job to find those factory calibrations for the speedo, tach, etc. Probably near impossible unless you or someone you know works as a tech at Volvo. And I don't mean your average service advisor or parts dept. guy either. I see your point though, and Volvo may have them calibrated for all OE tire sizes or only 1 or 2--anything is possible. Personally, I don't find it to be that big a problem not knowing the little variation in circumference between my stock tires and my 17" tires because there will be variation no matter what you do. Remember, as the life of the tires you currently have on your car wear out, the circumference will decrease as well so it's all moot and really just a numbers game. Out on the road, there won't be much discerbible difference in the way the car behaves as a result of these variations.
Regarding the rubbing problem, on both sets of tires that I've tried, the rubbing does happen right at the outer corner (where the tread and sidewall meet) of the tire. Maybe you misunderstood by what I meant in terms of "rubbing" in my initial post. I don't have any problems with the inner fender rubbing at full steering lock, I just have rubbing happening at the outside lip of the front fenders under hard cornering. A Volvo mechanic told me that dialing in -1 degree in the front is actually no problem if done right (no camber plates needed) so go figure. He may be misinformed but if that doesn't work, then I have no choice but to get some camber plates--$27 sounds like a good price actually. I'll see how it goes.
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