I got tired of turning over everytime I made a hard turn. So I had a redcat mt just sitting around, I figured if I could get the tires an wheels to fit that would help. Well, I had no idea what an animal I was going to create. Here's a pic
I have a rock rey bnd and know what you mean about turning over. it has 2.2 tires on it and 12mm hex hubs so I can't go to a 3.8 wheel.
but it looks like the added weight from the bigger tires would help hold it down in the corners.
I used the outter axle hub from my redcat mt. Drilled them out to 5/16 to fit stock rock rey axle. It was really kind of an easy upgrade. It totally made it a different truck, it will wheelie at will. 8s will shred the tires, I think I like it now. My x2 on 8s is a beast, I've bashed it super hard an never broke anything. Losi is best but, this x2 roller I bought is tough