aftermarket wheels/tires and bumpsteer....

[mynameismike65]

Current setup.

18x9 front, 255/45
18x10 rear, 295/40

Ok, since I put my new wheels and tires on I have been having issues with bumpsteer. Basically any uneven area or grooves in the road the car will pull and follow on its own. If I take my hand off the wheel and the car catches a groove or a dip the car will follow (and the wheel will move on its own). It sounds like bumpsteer to me, but could it be that I need an alignment? EVERYTHING suspension wise is stock. I just want to get this figured out so it feels tight and predicatable again (like stock) There is nothing worse then catching a groove at a high rate of speed. I was looking into the Steeda kit depending on feedback. Experiences? Thoughts?

 

[Bullitt3478]

Wider tires than you had before on the front?The wider you go on the front the worse it gets usually.Not saying this is it, but I know when I went with wider tires on one of my other mustangs, it changed the way it tracked on bad roads.Here in the south the logging trucks make rutts in the road, and when the tires find them they will take you for a ride.

 

[BAKnBLK2010]

Wider tires than you had before on the front?The wider you go on the front the worse it gets usually.Not saying this is it, but I know when I went with wider tires on one of my other mustangs, it changed the way it tracked on bad roads.Here in the south the logging trucks make rutts in the road, and when the tires find them they will take you for a ride.

Plus 1. Just be glad you didn't go with 275's on the front. It would be even worse.

 

[Sinergyms]

Although bumpsteer can be an issue, since you didn't mention any suspension changes I will assume the car is stock in that regard.

If it is catching grooves in the road and following what you are experiencing is called tramlining. It is most commonly due to the tread pattern on your tires.

http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=47

Tire width CAN cause it to be worse but is not the culprit. Just to give you an example, I had 275/35/18 Michelin Pilot PS2 tires on all 4 corners of the car and suffered no tramlining but on a friends mustang with narrower BFG KDW2's and their "cool" flame design tread the car wouldn't stay in one lane due to the grooves catching every rut in the road.

What tires are you running?

If you are still thinking it is a bumpsteer issue you can actually get a kit to measure it yourself and then correct the problem.

http://www.thedirtforum.com/bumpsteer.htm

http://www.maximummotorsports.com/store/index.php?main_page=product_info&cPath=71&products_id=193

 

[Flyby763]

Wider tires than you had before on the front?The wider you go on the front the worse it gets usually.Not saying this is it, but I know when I went with wider tires on one of my other mustangs, it changed the way it tracked on bad roads.Here in the south the logging trucks make rutts in the road, and when the tires find them they will take you for a ride.

F'n log trucks!!!

 

[Bullitt3478]

F'n log trucks!!!

HAHA no shit.Your from Yulee?I have worked there for 11 years now.Small world.

 

[mynameismike65]

Although bumpsteer can be an issue, since you didn't mention any suspension changes I will assume the car is stock in that regard.

If it is catching grooves in the road and following what you are experiencing is called tramlining. It is most commonly due to the tread pattern on your tires.

http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=47

Tire width CAN cause it to be worse but is not the culprit. Just to give you an example, I had 275/35/18 Michelin Pilot PS2 tires on all 4 corners of the car and suffered no tramlining but on a friends mustang with narrower BFG KDW2's and their "cool" flame design tread the car wouldn't stay in one lane due to the grooves catching every rut in the road.

What tires are you running?

If you are still thinking it is a bumpsteer issue you can actually get a kit to measure it yourself and then correct the problem.

http://www.thedirtforum.com/bumpsteer.htm

http://www.maximummotorsports.com/store/index.php?main_page=product_info&cPath=71&products_id=193

I have the Falken Azenis

 

[Nitemare]

I had kind of the same problem. But my car was lowered with eibach springs with 17inch crater rims. Whenever I would go around a turn on the highway it switching lanes, my steering wheel would stay at the same degree as I turned it to merge into the next lane, but the car would keep turning without me moving the steering wheel. Turns out, a bolt or nut on my steering rack was loose.

 

[Sinergyms]

I have the Falken Azenis

Really? Just to confirm, you are running the Azenis 615's, right?
Haven't had too much of a tramlining issue and we run a LOT of Falken tires.

 

[mynameismike65]

Really? Just to confirm, you are running the Azenis 615's, right?
Haven't had too much of a tramlining issue and we run a LOT of Falken tires.

yes sir

 

[LuckyH]

+1

275's on the front and it's noticeable especially under braking.

 

[GlassVapor]

Plus 1. Just be glad you didn't go with 275's on the front. It would be even worse.

I run 275's all around and she is sweet fwiw

 

[mynameismike65]

http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=47

This is my issue. Now possible solutions???

 

[fhlh]

run skinnies