Tires Extreme driving back!

Hello, yesterday I took a look at my two rear tires and had to find out with horror how Krass had already left. Outside almost new and inside smooth like Sliks. And the worst thing, the tires have an extreme saw tooth formation (I’ve never seen that before)! You can already recognize it from a mere eye, and if you drive over it with your hand then it feels like my sixpack 😉 No now in serious I never had the problem with the saw before tooth formation, which is annoying, especially the tires are making an incredible noise! What did you do because of the extreme fall in the back? It can’t be that you need all 15000 km new tires! With dimensions of 225/35/19 this is a fucking fun! I know that there are the adjustable crossbars of Forge, but does someone know a cheaper solution? gruss Ari