Getting the 656 back on the road (field)

is there any harm in replacing a worn (almost smooth) rear tire with a new one when the other side is 50 - 60%? One front tire (narrow front) is fairly weather checked as well.

Any recommendations? Try find a used one? Do used ones exist?

Thanks, Eric

But, if you can't find one, you're probably not gonna hurt anything running one new rear tire and one 50% unless you spend the majority of your time running it in high gear down hard-surfaced roads. For general "off road" work, it won't hurt enough that you'd ever know it. The spider gears in the differential will be turning slightly when you're driving straight is the only difference.

We have three 90's model John Deere(yeah, I know) 4x4 tractors on our ranch that we use alot every day and not a one of them has a matched set(wear-wise) of tires. We just replace one when it gets ruined, regardles of the others.

One thing you would probably want to do, though, is make sure whatever new tire you get is the same as the other as far as bias ply or radial.