new tires = bump steer
Thread Starter
JK Super Freak
Joined: Jun 2009
Posts: 1,312
Likes: 1
From: Cashton, WI
new tires = bump steer
I recently upgraded to 35's from 33's. I drove on the 33's for 8K with my OME 2.5" lift with no problems and no bump steer.
Now that I have 35's I have bump steer that is getting worst. I do not have an adjustable F trac bar, and have checked all bolts for tightness and nothing is bent/broke.
I did a search and it seems the best solution is a JKS trac bar bracket ??
Any ideas
Now that I have 35's I have bump steer that is getting worst. I do not have an adjustable F trac bar, and have checked all bolts for tightness and nothing is bent/broke.
I did a search and it seems the best solution is a JKS trac bar bracket ??
Any ideas
JK Super Freak
Joined: Jun 2007
Posts: 1,115
Likes: 0
From: Dayton, WA
Just going to larger tires shouldn't create bump steer. It is caused by other suspension components.
Perhaps the new tires are stiffer, transmitting more shock to the suspension and making it noticeable now.
Perhaps the new tires are stiffer, transmitting more shock to the suspension and making it noticeable now.
JK Jedi
Joined: Aug 2007
Posts: 5,813
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From: Kenai Peninsula, Alaska
JK Newbie
Joined: Apr 2009
Posts: 57
Likes: 0
From: gettysburg
had the same problem with mine..... dropped down to 30 and it is a ton better...... although the tire shop did have 60 lbs in them when i picked it up
it was more like bouncing down the road then driving!!!!!!! couldn't beleve it when i got home and checked them and it maxed out my gauge....
it was more like bouncing down the road then driving!!!!!!! couldn't beleve it when i got home and checked them and it maxed out my gauge....
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JK Jedi
Joined: Feb 2009
Posts: 4,012
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From: Lawton, OK
What are the specs on your 35s as compared to the 33s? If your 35s are wider than the 33s, that'll contribute some to the bump steer and going bigger will definitely make it more noticeable. Also, are you still running the stock SS or have you upgraded to a heavy duty one?
Another thing that may help would be some adjustable LCAs. Adjustable Trackbar will help recenter the axle under the jeep, but even without that, you shouldn't have bump steer
Another thing that may help would be some adjustable LCAs. Adjustable Trackbar will help recenter the axle under the jeep, but even without that, you shouldn't have bump steer
Thread Starter
JK Super Freak
Joined: Jun 2009
Posts: 1,312
Likes: 1
From: Cashton, WI
What are the specs on your 35s as compared to the 33s? If your 35s are wider than the 33s, that'll contribute some to the bump steer and going bigger will definitely make it more noticeable. Also, are you still running the stock SS or have you upgraded to a heavy duty one?
Another thing that may help would be some adjustable LCAs. Adjustable Trackbar will help recenter the axle under the jeep, but even without that, you shouldn't have bump steer
Another thing that may help would be some adjustable LCAs. Adjustable Trackbar will help recenter the axle under the jeep, but even without that, you shouldn't have bump steer
JK Jedi
Joined: Feb 2009
Posts: 4,012
Likes: 0
From: Lawton, OK
Also, did you check your "toe-in" settings? It is recommended to increase your toe-in. Here's the excerpt from WOL's writeups and the link to it:
Now, if you just installed a set of 33" tall tires, you most likely will NOT have to adjust your toe-in as the new Jeep JK Wrangler’s have been designed with a steering setup that has the drag link attached directly to the steering knuckle (as opposed to the tie rod as was the case on the older TJ model Wranglers) and your toe-in setting will not change from stock and this should be fine. However, if you’ve just install 35" tires, you may want to consider increasing your toe in to about an 1/8". Please note, past experience has shown these numbers to work well under these circumstances but are not guaranteed to be what you need.
Once you have everything dialed in right, a heavy duty SS would also help