@steveomatik for 190mm racing you want 0 offset most race bodies are just barely 190mm so there is no room for offset. for 200mm bodies it varies by body personally I run an hpi mustang gtr and 3mm front and 6mm offset in the rear looks the best. I have 9mm wheels and they actually stick out of the body quite a bit however if I put my 70 hpi challenger or my big skyline they will take 6mm in the front and 9mm in the rear no problem.