How to Set the Seat Height on a Mountain Bike for Optimal Performance and Comfort
To set the seat height on a mountain bike, start by standing next to the bike and adjusting the height of the seat post so that it is level with your hip bone. Sit on the bike and place one foot on a pedal with it at the bottom of the pedal stroke. The leg with the foot on the pedal should be almost fully extended, but not locked out. Adjust the seat height up or down until your leg is at the correct angle. Tighten the seat post clamp to secure the seat at the desired height.