I have my Tr Arena set-up with 7,000 front / 20,000 center / 3,000 rear. For my shocks I have 60wt in the front and 45wt in the rear with #2 pistons on all four shocks. I had 35 wt in the rear but my truggy was bottoming out and I was getting chassis slap so I increased the wt to 45 in the rear. Hope this helps. Good luck