I bought a set of bf goodrich tires 235/70/15 7-23-2010 from discount tire and since 1/2011 up to 5/2011 I've had these tires balanced 3 times cause they won't stay balanced now in july 2011 they are out of balance again So now I've got to have them replaced w/ a new set which I have to pay a pro rata amount of $79. which is not bad I guess but as much trouble as they have been free would be better I've had 3 other sets of these tires over the years on 2 other trucks and this truck now and this set now is the worst riding set ever