How to choose the right crank length: the trend toward shorter cranks explained
Crank arm length is a crucial element in your bike setup, influencing both your comfort and performance. In recent years, there has been a notable trend toward shorter crank arms, among both professional and recreational cyclists. But how do you determine the ideal length for you? This article explores the benefits of shorter crank arms and provides advice based on scientific data and recent news.
Current trends among professionals
Renowned cyclists are now adopting shorter cranks.
Tadej Pogačar is one of the first to set the stage alight! A two-time Tour de France winner, he uses 165mm cranks, despite his height of 1.76 m. This choice allows him to maintain a high cadence and reduce stress on his joints, thus improving his performance during intense races.
Even more extreme, on the Visma Lease a Bike side, in 2025 Jonas Vingegaard is riding with 150mm cranks, as for the rest of the team: not a single rider has anything longer than 165mm!
Why choose shorter cranks?
Reduction of biomechanical constraints
One of the main benefits of shorter cranks is the reduced stress on joints , especially the knees and hips. By reducing the length of the cranks, flexion angles are less pronounced, which can be beneficial for cyclists with joint pain or limited mobility. This configuration also allows for smoother power transmission, especially during prolonged efforts or in time trial positions.
Improved cadence and aerodynamics
Shorter cranks promote a higher pedaling cadence, thus distributing muscle load more efficiently and delaying fatigue . In addition, they allow for a more aerodynamic riding position by reducing the height to which the knees rise when pedaling, which is particularly advantageous for time trials or solo efforts.
How to determine the correct crank length?
Choosing your crank length should take into account several factors, including your body type, riding style, and cycling goals. A commonly used formula is to multiply your inseam length (in cm) by 0.216 to get an estimate of your crank length in millimeters. However, this theoretical approach should be adjusted based on your flexibility, riding position, and any specific biomechanical constraints.
0.216 x inseam = crank length
For the geekiest among you, variable-length cranks have even been created, allowing you to vary the length depending on your outings to determine the one that suits you best. For example, the Appleman brand sells a crank whose length can range from 100 to 175, so there's something for everyone! 
Consultation with a professional
The safest way to choose your crank length is to consult a bike fitting professional. A personalized analysis will assess the potential impact on your performance and comfort, ensuring the change will be beneficial in the long run. Additionally, an adjustment period is often necessary for your body to adjust to the new configuration.
Conclusion
The trend toward shorter cranks is supported by biomechanical benefits and performance improvements. However, choosing the ideal length should be individualized, taking into account your body type, riding style, and goals. Consultation with a professional and an adjustment period are essential to maximize the benefits of this change.
