Cooper AT3 balance issue (2 Viewers)

[06 flstfise]

got some AT3 put on a couple of weeks ago and have had them rebalanced 3 times now and still getting a vibration at 70 and above. Has anyone else ever had issues with them?

 

[ihadmail]

I don't have experience with those specific tires, but have you done the basics:

• Ensure wheel(s) are not out of round?
• Inspect tires for out of round?
• Inspect tires for sidewall defects inside and out?
• Inspect tires for tread area defects inside and out?
• Taken it to a shop that's willing to spin the tire on the wheel so they're not having to use as much weight to balance?

It's not horribly uncommon to get a brand new tire that has a defect.

Also, were you getting any vibration prior to the mount and balance of the new tires? Plenty of suspension/ball joint/bushings/bearings can also cause vibrations.

 

[06 flstfise]

I was not getting any vibrations prior. I have not taken it to another shop due to current shops willingness to keep trying to make it right and I have been going there for years. Inspection didn't reveal anything out of ordinary with the tire. A buddy at work got the same tire and size on his f150 and said he had same issue but it went away after 1k miles.

 

[bucfl]

Not the same issue but may point you in the right direction. Also, where do you feal the vibration. If you feel it under your butt its a rear tire issue, try rotating to front. If its the front then its a front tire issue, try rotating to back. If after this amount of time your still having a problem, consider a replacement set all the way around.

Diagnosing Tire Pull

 

[gregnash]

I remembered reading a while back it looked like there were some issues with the AT3 out of one of their plants (Mexico I think) and they had a pretty large batch that had serious balance issues. Maybe try getting a hold of Cooper to see if they have any ideas.

 

[06 flstfise]

I found some of the same info in a ford forum and seem like the f150 guys have had issues as well. But took @bucfl info and found out just one of them was off. Rebalanced again and now back to smooth as glass. Thanks for the input guys

 

[bucfl]

Sweet!