I put 4 new Coopers on my 06 2500. As soon as the weather got cold I had a vibration between 45 and 70 mph. When summer came the vibration went away. The following winter has arrived and the vibration is back. Had the tires rebalanced with no improvement. Anyone had a similar experience?

 

No idea re the Coopers but suggest that to get around this that you install Centramatics on all 4 wheels. I used to get intermittent vibration from my tires (different brands) but then installed the Centramatics and since then my truck has never been smoother.

 

Used to love coopers. In the last 2 years I've had to exchange new sets for different brands as I couldn't get them to balance. And they were stock size coopers.

I'd suggest trying force balancing or swapping to another brand.

 

Out of frustration with some BFG AT's I had on my 24v,I changed to Toyos. It's been 11 years now and each tire without exception has balanced with minimal weight.
You might just give them a try. Toyo includes a 45 day/500 mile return policy.