I basically gear my quad for glamis so that I can pull 5th up olds on the middle of it. The right side of olds will pull 4th. Usually when I get this down then duning is perfect but sometimes could use one tooth smaller on the rear for pulling long wheelies over the up and overs. Gearing is different for everone because of weight, tires, swing arm length, horse power. When I first bought my quad with just t-5's and some 20-10-10 10 paddles extreme haulers I rode with stock gearing and could only pull I think 3rd to 4th but forth would bog. I then put on a 13 up front and it helped out a lot but I really dont remember too well because that was like 5 years ago.