Thread: Rear Shimmy
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Old 01-20-2012, 07:58 AM   #2
blazerbrad
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Different size rear tires can cause this sort of problem. Regardless of it being IRS it still have the same spring rates and wants to maintain the same suspesnion height side to side. The taller tire will cause that side to load more and mess up the weight distribution. To really know the height difference in tires you need the entire number (i.e. 215/60R15). 215 and 205 only verify there is 10 mm. difference in width and you need the aspect ratio to see the height.

I'm also not saying this is definitely the problem or the only problem. Might be one of those things where the difference size tires is exaggerating something else. Being a '95 when was the last time the rear shocks/struts were changed? How are the bushings in the suspension?
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