Crank Length Calculator

What is crank length?

Crank length is the measurement from the center of the bottom bracket (where the crankset attaches to the bike frame) to the center of the pedal spindle. It’s a key factor in bike fit and can influence your comfort and performance while cycling.

Does crank length really matter?

Yes, crank length matters. It affects the leverage on the pedals, pedaling cadence, and leg muscle range of motion. The right crank length can enhance comfort, efficiency, and power output. Conversely, the wrong crank length can lead to discomfort and hinder performance.

Do longer cranks increase power?

No. There have been many studies that clearly indicate that crank length does not have an impact on power.

How do I measure my inseam for the calculator?

To measure your inseam, stand upright with your back against a wall and your feet slightly apart. Place a book or similar object between your legs, with one edge against your crotch (as if sitting on a bike saddle). Measure the distance from the top edge of the book to the floor—this is your inseam. Take the measurement barefoot or with minimal footwear for accuracy.

Does crank length affect saddle height?

Yes, crank length affects saddle height. The longer the cranks, the lower the saddle; the shorter the cranks, the higher the saddle.

Should I choose a crank length from the acceptable range provided?

The acceptable range provided by the calculator offers flexibility in choosing a crank length that suits your preferences and riding style. If unsure which length to choose, consider trying different lengths to find the most comfortable and efficient option. A professional bike fitter can also offer personalized advice and recommendations.