Put it on a rack... concerning tire wear

[Regimof]

I have a friend that has a shop and I convinced him to let me put the Z on so I could clean up underneath and see what's what. I've had it on a couple drives and figure that the cobwebs should be shaken out and any new issues might present themselves.

So after we looked online for 25 minutes on how to get a c4 up correctly, we lifted it and the first thing we saw was the rear tires are toast. That happens. It's due anyway. The concerning part, for me, is how they wore. The insides on both tires were considerably more worn..one actually has wires showing... and the outsides are fine.

Is this something I should be worried over? It doesn't seem right, but I not a smart man. I'm not familiar with these fat tires.

One more thing... occasionally when I get on it, that brake warning light comes on. Like I have the parking brake on. Nothing happens.. just the light. Thoughts?