Check your alignment too. Try to keep your caster at or very close to 7* and that should help somewhat. If OK, lose the runcraps and go with some good NRFTs. You'll be amazed at the difference. 
striaght line tracking problem..
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Instructor
Joined: Sep 2006
Posts: 194
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From: Holbrook NY
striaght line tracking problem..
I currently have the goodyear runflats and was wondering if what i am experiencing is common. My 98 c5 seems to be effected by the slightest of uneven pavement. On smooth even pavement i can let go of the wheel and the car tracks straight as an arrow. But on verticle expansion joints or slight ruts it pulls like crazy. Someone told me that dry rotted tires can have that effect on steering. Anyone have an educated opinion?
Melting Slicks
Joined: Nov 2005
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From: clackamas oregon
non runflats helped mine out a bunch. but with the runflats mine did this with a vengance. tire pressure too high also magnifies this. you will not be able to eliminate it. but there are ways to lessen the effect
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I wouldn't say totally normal. Check your air pressure to make sure the fronts are even( most do 30-32 cold) and a trip to the alignment shop may not be a bad idea, just don't let them charge you a ridiculous price to do so. The runflats are not the best handling tires in the world and hiccups in performance are common, but lower mileage tires shouldn't jump around. 
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Joined: Sep 2006
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Mine did the same thing - 2 steps to fix:
1. replace the Goodyear run flats with Michelin Pilot Sport A/S ZP
2. get a good 4 wheel alignment
You will not believe the difference - it tracks like on rails with NO wandering or pulling.
I also get my alignment checked every year as the slightest bit of excessive toe out on the fronts seems to cause this.
1. replace the Goodyear run flats with Michelin Pilot Sport A/S ZP
2. get a good 4 wheel alignment
You will not believe the difference - it tracks like on rails with NO wandering or pulling.
I also get my alignment checked every year as the slightest bit of excessive toe out on the fronts seems to cause this.
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Mine does it some, but not alot. Make sure you have the right pressure in the tires.
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Melting Slicks
Joined: Oct 2006
Posts: 2,193
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From: Navarre FL
I have been noticing the same thing in my 02Z. Tracks perfect on a nice blacktop or similiar smooth top, but if there are any expansion joints or ruts at all it pulls like crazy! I wouldnt think its alignment or it would do it all the time. I just figured it was a side effect of the wider performance tires (my first HP car)
