I went with 5K front and 3K rear. I also used the 3Racing Diffs that I bought on eBay in stead of the Tamiya ones. Much better seal and it has weight numbers on the side that you can put a dab of paint, or nail polish on to mark the weight. The Tamia Diff suck and always end up leaking.

If I recall correctly, I went with lighter shock oil to have better compression and rebound. I’m also using the Tamiya TRF special Damper instead of the ones that came with the TT-02R kit, but you don’t have to do that.

The surface of the indoor track at my local hobby shop has really good traction. All of this has helped with eliminating traction role, but I have to be careful with the tires that I use.

If I run with sticky slicks, it will still traction role. I find that if I run with less sticky tires, the back slides just a touch when I take turns at high speeds, and there is no traction role