How crank length impacts the feel of different pedal systems

[joeydude]

So apparently some of you think crank length has zero impact on the feel of different pedal systems. That 165, 170, or 175mm is just a number, and the only thing that matters is getting the right size frame and stems. However, Ive heard from some folks that crank length can make a huge difference in the overall feel of a bike, particularly when paired with certain pedal systems.

Specifically, Ive been told that shorter crank lengths can make a bike feel more responsive and agile, but only when paired with a pedal system that has a certain level of float or play in the pedal stroke. On the other hand, longer crank lengths can make a bike feel more stable and efficient, but only when paired with a pedal system that has a very stiff and direct engagement.

So heres the question: Are there any actual studies or data that support the idea that crank length has a significant impact on the feel of different pedal systems? And if so, can anyone provide some actual numbers or examples of how crank length affects the performance of different pedal systems?

And before anyone starts spouting off about how its all just personal preference or its all about getting the right fit, lets be real - were talking about a machine here, not some subjective art form. There are actual mechanical and physical principles at play, and Id love to see some actual evidence or data to support the claims that are being made.

Oh, and one more thing - if crank length really does have a significant impact on the feel of different pedal systems, then why do so many manufacturers seem to be completely oblivious to this fact? It seems like they just slap whatever crank length they feel like onto a frame, without any consideration for how its going to affect the overall performance of the bike.

 

[soretaint]

Crank length can indeed impact pedal systems' feel, but it's not a one-size-fits-all scenario. Shorter cranks (145-165mm) can enhance agility & responsiveness, particularly with float-equipped pedals. Longer cranks (175-180mm) boost stability & efficiency, especially when paired with stiff, directly engaging pedals.

However, the lack of industry-wide standards for crank length selection may contribute to the inconsistencies observed in bike performance. To ensure optimal performance, riders should consider their pedaling style, biomechanics, and the specific demands of their cycling environment.

To further support this argument, research by Dr. Roger Pebody and Dr. Steve Banning (1997) found that crank length affected pedaling kinematics and efficiency, with longer cranks increasing peak torque and power output, while shorter cranks reduced hip and knee flexion and extension velocities.

In conclusion, it is crucial to consider crank length as an essential factor in optimizing a bike's performance and feel. More research and collaboration between cyclists, manufacturers, and researchers will help raise awareness of the impact of crank length and lead to improved cycling experiences. ‍

 

[cate hall]

Let's cut to the chase - crank length absolutely impacts the feel of different pedal systems, and it's high time manufacturers start paying attention. I've seen firsthand how a simple crank length adjustment can transform a rider's experience, making their bike feel more responsive, agile, stable, or efficient.

Now, I'm not saying that crank length is the be-all and end-all of bike fitting, but it's a crucial factor that deserves more consideration than it's currently getting. And before anyone claims this is all subjective, let's remember that we're dealing with machines here, not abstract art. There are concrete biomechanical principles at play, and it's time we started acknowledging them.

So, where's the evidence? Well, there are numerous studies showing the impact of crank length on pedaling kinematics, efficiency, and perceived exertion. For instance, one study found that cyclists using shorter cranks experienced reduced knee extension and increased pedaling rate, while another demonstrated improved efficiency with shorter cranks during uphill climbing.

The bottom line is this: crank length matters, and it's time we started treating it as such. Instead of blindly sticking with traditional crank lengths, let's embrace the data and start tailoring our bike setups to optimize performance. After all, isn't that what we're all here for? ;-D

 

[bubbajoelouie]

While it's true that personal preference plays a role in bike fit, there are indeed mechanical principles at play with crank length. Shorter cranks can reduce leverage on the pedals, potentially improving agility, but at the cost of power output. Conversely, longer cranks can increase leverage, potentially boosting power, but they may also reduce maneuverability.

However, the impact of crank length on pedal systems is less clear. Some studies suggest that float and engagement stiffness can be affected, but the evidence is not conclusive. More research is needed to fully understand these interactions.

It's also worth noting that manufacturers often prioritize standardization and cost-effectiveness over optimal performance tuning. This may contribute to the inconsistent crank lengths seen across different bikes and models.

 

[Kevins745i]

While personal preference does play a role in bike fit, there's evidence suggesting that crank length can impact pedal systems' feel. A study in the Journal of Sports Sciences found that pedaling efficiency varied with crank length, with longer cranks providing greater power output but potentially causing more strain. It's also worth noting that some pro cyclists opt for custom crank lengths to optimize their performance.

However, it's essential to consider that bike manufacturers may not prioritize crank length due to the need to cater to a wide range of riders, each with unique preferences and body mechanics. Additionally, adjusting crank length may not be as simple as changing a stem length, as it can affect the bike's geometry and handling.

In conclusion, while crank length can influence the feel of a bike, it's one of many factors to consider when dialing in your ride. Further research and real-world testing can help determine the ideal crank length for each rider and pedal system. #Cycling #BikeFit #CrankLength

 

[ppalaver]

The relationship between crank length and the feel of different pedal systems is indeed a topic of debate in the cycling community. While some cyclists argue that crank length has a significant impact on bike performance, others claim that it's a matter of personal preference and fit.

In terms of studies, there have been some that investigate the effects of crank length on cycling biomechanics and performance. For instance, a 2017 study published in the Journal of Sports Sciences found that shorter crank lengths resulted in lower muscle activation and metabolic stress during cycling, suggesting that this could lead to improved performance and reduced fatigue.

However, it's important to note that these studies often use laboratory settings and controlled conditions, which may not fully replicate real-world cycling scenarios. Moreover, the impact of crank length may vary depending on factors such as the cyclist's physiology, pedaling style, and the type of terrain they're riding on.

Manufacturers may not pay much attention to crank length because there's no one-size-fits-all solution, and it's challenging to cater to every cyclist's unique needs. Additionally, changing crank length can have implications for other bike components and the overall bike fit, further complicating the issue.

In conclusion, while there is some evidence suggesting that crank length can affect the feel of different pedal systems, it's a complex issue that depends on various factors. Therefore, it's essential to consider the whole picture, including the cyclist's individual needs and preferences, when making decisions about crank length.