How to Calculate Pedal Height for a Bike

Experts have argued for years about the best formula for determining the optimal placement of the body to the pedals of a bicycle. Many different formulas resulted from these arguments, but one element they all agree on is that you must start with a correct inseam measurement and proper seat-to-frame ratio. This method was developed by three-time Tour de France winner Greg LeMond.

Difficulty:

Easy

Instructions

1. Measure your inseam from the highest point possible between the legs to the floor. It's best to take several measurements and then average them for the most accurate measurement possible.

2. Calculate 88.3 percent of your inseam length. Simply multiply your inseam by .883 or use an online percentage calculator like the one found on the Math website.

3. Adjust your bike seat so the distance between the center of the seat's bottom bracket to the top of the seat is 88.3 percent of your inseam length.

4. Sit on the adjusted seat.

5. Make sure the bike is level to the ground.

6. Hang one leg straight down while seated on the bike. Place the ball of your foot straight over the center of the pedal spindle.

7. Adjust the pedal height so the ball of your foot rests lightly on the center of the pedal.

Tips & Warnings

• Avoid the temptation to make the distance between the pedals and seat too short. The extra work required of your body to pedal a bike when this distance is too short significantly reduces the length of time you can pedal before you reach muscle fatigue.