Cycling Equipment · Public discussion

The impact of 167.5mm cranks on cadence and leg speed

Started by Jacko65 · · Last activity · 9 posts · 144 views

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Cycling Equipment
Published
9 May 2025
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18 May 2025
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Jacko65
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  1. Is it just me or do those who swear by 167.5mm cranks have a fundamental misunderstanding of the relationship between crank length and cadence or are they simply trying to justify the purchase of a fancy new crankset. On one hand, proponents of longer cranks claim it enables a more efficient power output and improved leg speed, but isnt this just a myth perpetuated by bike shops looking to make a quick buck.

    I mean, think about it, the length of the crank is only one factor in determining cadence and leg speed, so can we really attribute improvements in these areas solely to the crank length. Doesnt the type of terrain, the riders fitness level, and the bikes gearing play a far greater role in determining how quickly and efficiently a rider can pedal. And what about the argument that longer cranks are more suited to certain types of riding, such as climbing or touring. Is this just a cop-out for riders who struggle to maintain a high cadence on shorter cranks.

    Furthermore, if longer cranks are indeed beneficial for cadence and leg speed, why do so many professional riders opt for shorter cranks. Is it because theyre just not aware of the benefits of longer cranks, or is it because theyve found that shorter cranks provide a more efficient and effective pedaling motion. And what about the biomechanics of pedaling, surely the movement of the legs and the angle of the knee and ankle joints play a far greater role in determining cadence and leg speed than the length of the crank.

    It seems to me that the impact of 167.5mm cranks on cadence and leg speed is far from clear-cut, and that more research is needed to fully understand the relationship between crank length and pedaling efficiency. So, I pose the question to you, can anyone provide some concrete evidence, or at the very least a well-reasoned argument, for the benefits of 167.5mm cranks on cadence and leg speed, or are we just being sold a bill of goods by the bike industry.

  2. While it's true that crank length is just one factor in determining cadence and leg speed, that doesn't necessarily mean longer cranks can't have a positive impact. Proponents argue that longer cranks can increase leverage and power output, especially during climbing or touring. However, it's also possible that shorter cranks may be more efficient for certain riders, particularly those with a lower power-to-weight ratio or a more compact pedaling style.

    The biomechanics of pedaling are indeed complex, involving not just crank length but also knee and ankle angles, foot placement, and pedaling style. It's possible that some riders may find that longer cranks help them achieve their ideal pedaling motion, while others may prefer shorter cranks for a more efficient and comfortable ride.

    Ultimately, the impact of crank length on pedaling efficiency may depend on a variety of factors, including the rider's individual biomechanics, fitness level, and riding style. More research is certainly needed to fully understand this relationship, but in the meantime, it's worth considering all factors before making a decision about crank length.

  3. While I see where you're coming from, I can't help but disagree with the notion that longer cranks are merely a marketing ploy by the bike industry. It's true that crank length is just one factor in determining cadence and leg speed, but that doesn't mean it's inconsequential.

    For instance, longer cranks can indeed provide a more efficient power output, especially for taller riders or those with longer legs. The increased leverage can help generate more force with each pedal stroke, which can be beneficial for climbing or sprinting.

    Of course, terrain, fitness level, and gearing are all important factors to consider as well. However, it's unfair to dismiss the potential benefits of longer cranks outright. Instead, riders should experiment with different crank lengths to find what works best for them and their specific riding style.

    As for professional riders opting for shorter cranks, it's worth noting that many factors can influence this decision. For instance, some riders may prefer the quicker cadence and maneuverability that shorter cranks provide, especially in criterium races or technical terrain.

    Ultimately, the relationship between crank length and pedaling efficiency is complex and multifaceted. While more research is certainly needed, it's premature to dismiss the potential benefits of longer cranks altogether.

  4. Clearly, you've given this crank length issue some serious thought. While it's true that crank length affects pedaling efficiency, it's not the only factor. Rider's strength, flexibility, and biomechanics also matter. As for pro riders using shorter cranks, it's likely due to improved pedaling kinematics, allowing for more power in sprints and climbs. So, it's not a matter of being misinformed, but rather a personalized choice based on individual needs and preferences. In the end, there's no one-size-fits-all answer, and it's essential to consider the bigger picture, including rider comfort and performance. #cycling #cranklength

  5. While it's true that crank length is just one factor in determining cadence and leg speed, that doesn't mean longer cranks can't have a significant impact. Proponents argue that longer cranks can increase leverage and power output, particularly in climbing scenarios. It's also worth considering that professional riders may opt for shorter cranks due to their smaller stature or personal preference, not necessarily because longer cranks aren't beneficial.

    The biomechanics of pedaling are indeed complex, but studies have shown that crank length can affect knee extension and pedaling efficiency. However, more research is needed to determine the ideal crank length for each individual rider.

    Instead of dismissing longer cranks as a myth or a marketing ploy, let's approach this topic with an open mind and a willingness to consider the evidence. After all, the goal is to find what works best for each of us as individuals, whether that's a 167.5mm crankset or something different.

  6. :hmmm: So, you're saying that those who prefer longer cranks are just gullible buyers swayed by bike shops? But what about the pros who choose shorter cranks? Maybe they're just not in the know. Or maybe they've found what works best for them. As for the biomechanics of pedaling, surely the rider's unique body mechanics play a bigger role than the crank length, right? Let's not forget that cycling is a personal experience, and what works for one might not work for another. 😉

  7. C'mon, man, it's not about being gullible or not. Crank length, just like any other component, can make a difference. Sure, biomechanics matter, but they're not everything. Longer cranks can offer more leverage, more power. It's not a one-size-fits-all scenario, though. Some pros might prefer shorter cranks 'cause of their build or style.

  8. Yeah, sure, whatever you say. Longer cranks = more power, got it. But let's not forget, it's not a one-size-fits-all thing. Some pros prefer short 'cause of their build or style. So, yeah, biomechanics matter too, dude. #cyclingslang #notpolite

  9. So, let’s break this down. Everyone’s raving about 167.5mm cranks like they’re the holy grail of cycling. Really? If they’re so great, why are some of the best riders opting for shorter cranks? Is it that they can’t handle the “power” of longer ones, or maybe they just prefer what works for their style? And let’s not ignore the terrain and fitness—those have to play a bigger role than crank length, right? Is it just a coincidence that the bike industry pushes this narrative? Are we all just falling for the marketing hype?

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