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A bad tire can cause this. Swap the two front tires and see if it pulls to the opposite side after that. If so, it is one of the front tires. Resist having the bad tire moved to the back axle as it will bite you with the next rotation. If the tire dealer does this... will you know what they did?
Balance would not be a cause of this. But a tire dealer rebalancing has the oprotunity or chance to put a pulling tire on the back where it matters less; and the problem might 'go away' then.
If your camber is off and the balance of the two cambers is not close to zero, this cross camber creates pulling. Some tires will react strongly to this, others not much. The stiffer the tires, the higher the performance, the more it will pull. (Michelin seems to be an odd ball when it comes to performance tires. Their sidewalls seem soft to me compared to other tires. The stiffer sidewalls also make the ride harsher as well.)
So your old tires did not pull and the new ones do. So the old tires were masking a cross-camber situation, or there is a new tires (or more) that is not behaving as a cylinder, but has a conical characterist when rolling. An alignment with a printout would settle some of this. If you do that, you want a cross camber figure printed as well. If there is cross camber, look for damage to control arm and bushings (three per side). Sometimes the sibframe can be shifted a little bit, otherwise the top mount bolts can be extended a bit or the subframe adjusted (bent).
New tires also need to be broken in by rolling and some ride induced heat. The outer tread surface is contaminated with mold release angents and traction and tracking can be affected until this wears off. Tires in service also change their cross section to some extent to conform to camber.
I just did a long trip, over 2500 miles in 9 days. After that I found that (03 9-3 Aero Wagon w JR & SMBC 46K) my traction is much better with freashly exposed tread compound. I can bet much better acceleration with the TCS active or defeated. So the tire traction seems to be variable to some extent.
posted by 68.91.15...
, Wed, 26 May 2004 11:50:11
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