Outer Limits 4x4 Board

First thing in the morning i get a shudder through the whole car between 55 - 75 kph, but in the afternoon after sitting in the sun all day, it is much better and hardly noticeable. Would this be as simple as tyre balance, or has one of my unis partially siezed?

Any other ideas?

Cheers

more than likley it is the Swampers as they can develop some pretty cool flat spots etc. See if you can borrow a set of normal tyres roughly the same size to see if that does the same.

Stopped doing it today, but flat spots on the swampers are a daily occurance.