As for the front hub, there is only one cone nut on the left. The right side cone is fixed to the axel. After lubricating bearings or what ever I adjust it to a little tight and then back off a bit, no more than half a turn. I do this on the bike. I hold the cone nut with wrench when tightening the left axel nut. The left axel nut both holds the wheel to the fork and acts as a locking cone nut. Hope this helps.