PRS, good eyes.. I didn't even notice....
Truth.. Chain fell off, was too lazy to put it on (involves removing the tire which means a floor jack and I am lazy). As for the tires, it is actually worse than you see. The insides are different manufacturer altogether. probably more skids steer than slope tractor oriented so they have mediocre side traction. The outside tires are heavily worn, but balloon in nature so when you run them at 3 psi they hold the hill well. I think if I had 8 good tires in the balloon version my tractor would be a lot different. Chains greatly reduce my slow ability but really increase my traction.
As for orientation, I initially tried to have the front tires chevroning correctly forward, and the rears backward. They are all the same size and the wheel motors are all the same.
Eventually I realized for me it made little difference. This tractor is not a ground engager (it cannot pull normal implement) so traction is not as critical.
PT's are a swiss army knife machine. Owners swear by them, I have over 15 implements for mine (it is no just a mower). But PT has huge downside. As with a swiss knife, it does everything, and I mean it, but it does none of it extremely well. Fit and finish are oddly inconsistent, but unless I win the lotto and can swing an Antonia Carraro, this will be my tractor for my slopey property. It is an amazing machine, but I would only recommend it if you lived on slopes.