I had that problem, same speed too. My front tires were CASHED on the inside, my toe ate em up in like 7k miles, down to the steel belting. New tires and balancing fixed the problem, that was before the alignment. Try switching LF and LR around, and if that doesnt work try RF and RR. If it still does the same thing its probably not the wheels or tires.

 

You may have an out of round tire as well....

But I'm bet on the balancing..

Rotate your tires front to back and see what it does

 

can't staggered setup. only reason i did it was to make sure i could clear without spacers.

 

Bumnah, didnt you say you had them Ichiba 5 lug hubs? could they be the culprit yet again? I remember you said something was warped or whatever out the box, maybe they're not built that well?