Are Short Cranks Taking Over? What the Pro Peloton Data Actually Shows

Every few weeks there’s another article about some pro going to shorter cranks. Vingegaard on 150mm. Pogačar on 165mm. Van Aert experimenting with shorter lengths. The narrative is simple: short cranks are taking over.

But when you actually look at the data across the whole peloton, the story is more specific than that — and more useful.

The old rule

For decades, crank length followed a simple formula: taller rider, longer crank. The accepted standard for an average-height male was 172.5mm, with bigger riders going to 175mm and climbers occasionally running 170mm. The logic was mechanical — longer lever arm, more torque. Indurain was famously on 180mm for TTs. Pantani reportedly used 180mm in the mountains.

That logic is now mostly gone.

What the data actually shows

When you plot 35 current pro riders by height against crank length and color them by rider type, a clear pattern emerges — but it’s not the one the headlines suggest.

GC riders are going short. Everyone else basically hasn’t moved.

Look at the climbers and grand tour contenders: Pogačar, Vingegaard, Evenepoel, Pidcock, Roglic — they’ve all dropped to 165mm or shorter. Vingegaard made headlines in early 2025 when he was spotted on 150mm at the Volta ao Algarve. That’s extreme even by modern standards, and his team has since settled him around 160-165mm for most racing.

Now look at the sprinters. Merlier, Pedersen, Girmay, Jakobsen, Groenewegen, Kooij, Ackermann — almost all of them are on 172.5mm. They haven’t moved. Classics riders like Van der Poel, Asgreen, and Stuyven? Same — still clustered at 172.5mm. Even TT specialists like Küng and Bissegger are sitting at 170-172.5mm, despite TT being the discipline where aero position matters most.

The real headline isn’t “short cranks are taking over.” It’s: the riders most focused on sustained climbing efficiency are going shorter, and the riders who produce explosive power largely aren’t.

Why GC riders are going shorter

The biomechanics case for shorter cranks is well-established at this point:

Hip angle at top of stroke. With a shorter crank, your knee doesn’t travel as high at the top of the pedal stroke. This opens the hip angle, which reduces compression on the hip flexors and lets riders maintain a more aggressive aero position without the same level of impingement. For a GC rider spending six hours in the saddle over Alpine stages, that matters enormously over the course of a race.

Higher cadence efficiency. Shorter cranks reduce the arc the foot travels per revolution, which makes it easier to spin at higher cadences with less muscular effort. Pogačar and Vingegaard both cited improved efficiency and cadence as the primary reasons for switching.

No meaningful power loss. Multiple studies have confirmed that crank length within a fairly wide range — roughly 150mm to 175mm — has minimal impact on maximum power output. The body adapts. You’re not giving up watts by going shorter.

Aero position. Shorter cranks let riders get lower. The knee doesn’t come up as far, which means less disruption to airflow around the front of the bike. At the speeds grand tour contenders are traveling, that’s real time.

Why sprinters and classics riders are staying put

So if shorter cranks have all these advantages, why aren’t sprinters switching?

The answer is probably a combination of factors:

Sprint mechanics are different. A sprinter’s job is to produce maximum power for 10-20 seconds, usually seated, often at relatively lower cadence compared to a climber’s tempo efforts. The hip angle argument is less relevant when you’re upright in the drops hammering to the line rather than tucked in an aero road position for hours.

Torque still matters for explosive efforts. The research showing no power loss at shorter cranks is based on sustained efforts. The biomechanics of a peak sprint — where you’re producing close to maximum torque in a short burst — may favor the slightly longer lever arm. This is still debated, but it’s a reasonable explanation for why big classics riders like Politt (175mm at 6'4") and Van der Poel (172.5mm) haven’t followed the GC trend.

It works. Merlier, Philipsen, and Milan are winning races. If it’s not broken, the incentive to experiment is lower. GC riders are chasing marginal gains over thousands of kilometers in a single race — even a small improvement in sustained efficiency compounds over three weeks. A sprinter’s marginal gains come from different places.

What this means for average riders

The honest answer is: probably less than the headlines suggest.

The research is consistent — crank length within a normal range doesn’t dramatically change power output for most riders. What it can change is comfort, especially hip and knee health over long rides. If you’re experiencing hip impingement, tightness at the top of the stroke, or knee pain, going shorter is worth trying. Getting a bike fit first is the right call before spending money on new cranks.

The “pro data” is useful context, but pros are chasing marginal gains at a level where a few watts over six hours matters. For a recreational rider doing 3-4 hour rides, the comfort and injury-prevention argument for shorter cranks is actually more relevant than the performance argument.

A rough guide based on the current pro distribution:

The trend is shorter across the board. But it’s not a revolution — it’s a gradual recalibration, and it’s happening fastest among the riders for whom sustained climbing efficiency is the primary goal.

The bottom line

Short cranks are a real trend. They’re backed by legitimate biomechanics research and real-world results from the best riders in the world. But the narrative that the whole peloton is going shorter isn’t quite accurate.

GC riders are going shorter — deliberately and with measurable benefit. Sprinters and classics riders are largely staying at 170-172.5mm, which is where the peloton has been for years. The 175mm crank is quietly becoming a niche product for very tall riders and holdouts.

If you’re a climber or an endurance-focused rider, the case for experimenting with shorter cranks is real. If you’re a power-focused rider who lives for the sprint or the cobbles, the data suggests you’re probably fine where you are.

Get a bike fit. Try before you commit. And don’t let any headline tell you what’s right for your specific body.