What You Need to Know About Crankarm Length

When shopping for a new bike or upgrading your current ride, you may have come across the term “crankarm length.” But what does that mean, and why is it important? Here’s a quick primer on crankarm length and how it can affect your ride.

The crankarms are the two metal rods that connect the pedals to the bottom bracket (the part of the frame where they rotate). The length of the crankarms is measured from the center of the bottom bracket to the center of the pedal attachment point. Crankarm lengths typically range from 165mm to 180mm, with 170mm being the most common size.

So why does crankarm length matter? In general, longer crankarms are going to provide more leverage, making it easier to pedal at higher speeds. They also make it easier to maintain power when climbing hills.

However, longer crankarms can also make pedaling feel less efficient and can cause joint pain for some riders. Shorter crankarms offer a more compact pedal stroke and can be better for sprinting or riding in hilly terrain. Ultimately, it’s up to you to decide what feels best for your riding style and comfort level.

When it comes to choosing a crankarm length, there are a few things you need to take into consideration. Here’s what you need to know about crankarm length to help you make the best choice for your riding. First, consider the type of bike you ride.

If you have a road bike, you’ll want a shorter crankarm length than if you ride a mountain bike. The reason for this is that road bikes typically require higher pedaling cadences than mountain bikes. So, if you ride a road bike and choose a short crankarm length, it can make it difficult to maintain those high pedaling cadences.

Conversely, if you ride a mountain bike and choose a longer crankarm length, it can make climbing hills more difficult since your pedals will have further to travel with each stroke. Next, think about your riding style. Are you more of an endurance rider or do you like to sprint?

If you’re an endurance rider, shorter crankarms will likely be better since they put less stress on your knees over long rides. However, if sprinting is more your thing, go with longer crankarms as they’ll give you more power output per pedal stroke. Finally, take into account your height and leg length when selecting a crankarm length.

Generally speaking, taller riders and those with longer legs do better with longer cranks while shorter riders and those with shorter legs perform better with shorter cranks. But again, it all comes down to personal preference so experiment until you find what works best for you. Now that you know what to look for when choosing a crankarm length, get out there and start riding!

What You Need to Know About Crankarm Length

How Do I Choose Crankarm Length?

When it comes to choosing the right crankarm length, there are a few things you need to take into account. Here are a few tips to help you choose the right crankarm length for your bike.

1. The first thing you need to do is measure your inseam. This will give you a good starting point for finding the right crankarm length.

2. Once you have your inseam measurement, you can then start looking at different crankarm lengths. It’s important to find a length that is comfortable for you and that won’t put strain on your knees.

3. Another thing to keep in mind is the type of riding you’ll be doing most often. If you’re going to be doing a lot of climbing, for example, then you might want to go with a shorter crankarm length. This will help keep your legs from getting too tired on those long uphill climbs.

4. And finally, don’t forget about aesthetics! Crankarms come in all sorts of different colors and styles these days, so make sure to choose something that looks good on your bike and matches your personality.

Does Crank Arm Length Really Matter?

When it comes to choosing a bike, there are a lot of things to consider. One of the most important choices you’ll make is what size bike to get. This is partly determined by the bike’s crank arm length.

So, does crank arm length really matter? The short answer is yes, crank arm length does matter. It’s one of the main factors that determines how comfortable you’ll be on your bike and how efficiently you’ll be able to pedal.

Crank arms that are too short can cause discomfort in your knees and hips. You may also find it difficult to generate enough power to pedal effectively. On the other hand, crank arms that are too long can make it hard to control your bike and can put unnecessary strain on your back and shoulders.

The best way to find out what size bike and crank arm length is right for you is to go to a local bike shop and talk with an experienced salesperson. They’ll be able to help you find a bike that fits your body type and riding style.

How Does Crank Length Affect Gear Ratio?

How does crank length affect gear ratio? The answer may surprise you, but it is very important. Crank length has a direct effect on your gearing.

By increasing the length of the crank, you are effectively making the gears larger. This results in two things: first, your bike will be harder to pedal; and second, your top speed will be increased. Conversely, if you decrease the length of the crank, then your bike will become easier to pedal but top speed will be decreased.

Now that we know how changing the crank length affects our gearing, let’s talk about how this can help or hinder us when riding. If you are looking to ride faster and cover more ground quickly, then you will want to have a longer crank. This is because a longer crank provides more leverage, thus resulting in more power being transferred to the pedals and ultimately leading to a higher top speed.

However, if you are looking to do some climbing or simply want an easier time pedaling overall, then a shorter crank would be beneficial as it requires less effort to turn over. So there you have it! The next time someone asks how changing the crank length affects gear ratio, you can confidently explain that it all comes down to leverage and rider preference!

How Does Crank Length Affect Gear Ratio

What is the Difference between 170Mm And 175Mm Cranks?

There are a few key differences between 170mm and 175mm cranks. For one, 170mm cranks are typically found on road bikes while 175mm cranks are more common on mountain bikes. This is because shorter cranks offer better pedaling efficiency for road riding, while longer cranks provide more leverage for climbing and descending on trails.

Another difference is that 170mm cranks usually have smaller chainrings than 175mm cranks, which again reflects the different riding styles these two sizes are meant for – road biking tends to be done at relatively high speeds with fewer gear changes, while mountain biking often involves slower speeds and more gear changes. Finally, crank length can also affect the Q-factor of a bike, which is the distance between the pedals when viewed from above. A wider Q-factor can make pedaling feel less efficient and cause knee pain in some riders, so if you’re particularly sensitive to this issue you may want to stick with a shorter crank length.

How To Find What Size Your Bikes Cranks Are – Bicycle Crankset Size

Crank Length Calculator

When it comes to road bikes, there are a few key things that you need to take into account in order to find the perfect bike for you. One of those things is crank length. Your crank length is measured from the center of the bottom bracket to the center of the top of the pedal spindle, and it’s an important factor in your overall comfort and performance on the bike.

There are a few different ways that you can go about finding the right crank length for you. You can use a simple online calculator, like this one from BikeCalc.com. All you need to do is input your height and inseam measurements, and it will give you a range of recommended crank lengths based on your proportions.

Alternatively, you can head to your local bike shop and have them help you out. They’ll be able to measure your inseam and make recommendations based on what they see. And if you’re still unsure, most shops will let you test ride a few different bikes with different crank lengths until you find one that feels just right.

So don’t be afraid to experiment a bit – ultimately, it’s all about finding what works best for YOU.

Crank Length for Height

If you’re shopping for a new bike, or looking to upgrade the crankset on your current ride, you might be wondering what size crank arms are best for you. Unfortunately, there’s no easy answer, as crank length is largely a matter of personal preference. That said, there are some general guidelines you can follow based on your height.

For most adults, 170mm cranks will suffice. If you’re on the taller side (over 6 feet), you might prefer 175mm cranks. And if you’re relatively short (under 5 feet), 160mm or 165mm cranks might be a better fit.

Of course, the only way to know for sure is to get out and ride with different-sized cranks to see what feels best for you. When it comes to children’s bikes, things are a bit more straightforward. For kids under 10 years old, 140mm or 150mm cranks are typically best.

And for older kids and teens between 10 and 16 years old, 155mm or 160mm cranks usually work well. Again though, it’s always best to let your child try out different sizes before making a final decision. So there you have it – a quick overview of crank length and how it relates to height.

Remember that ultimately it’s up to you (or your child) to decide what feels most comfortable. And don’t be afraid to experiment with different sizes until you find the perfect fit!

Crank Length for Height

170 Vs 175 Crank Arm Length

There’s a lot of debate in the cycling world about what size crank arms are best. Some people swear by 170mm, while others prefer 175mm. So which is the right size for you?

Here’s a quick rundown of the pros and cons of each: 170mm:

– Often considered ideal for sprinting and fast riding, as it provides more leverage.

– Can feel less comfortable on long rides due to the higher pedal force required. 175mm: – Often considered ideal for longer rides, as it reduces stress on the knees.

It can also be helpful if you have knee pain when using a shorter crank arm length. – Some riders find that they produce more power with a longer crank arm length, but this is highly individual and something that you’ll need to experiment with to see what works best for you.

Crank Arm Length Calculator Sheldon Brown

Do you ever wonder if your bike’s crank arm length is optimally suited for your riding style? Well, Sheldon Brown has a handy calculator that can help you figure it out! First, measure the distance from the center of your bottom bracket to the center of your hip joint.

Then, input that number into the calculator along with your inseam (crotch to floor) measurement. The resulting number is the ideal length for your crank arms! Of course, this is just a starting point.

You may want to experiment with different lengths to find what feels best for you. But if you’re not sure where to start, this calculator is a great place.


There are a few things to consider when it comes to crankarm length. First,Crankarm length should be proportional to the rider’s inseam. Second, riders with longer legs may require a longer crankarm length.

Third, most mountain bike riders prefer shorter crankarms for easier maneuverability and quicker acceleration out of corners. Lastly, some road cyclists prefer longer crankarms for increased leverage and power output while sprinting or climbing hills.


  • Shafin Al Mahmud

    Shafin is a biker and writer from Amana Colonies, IA, USA. where he resides in a small village. With a passion for cycling and a talent for words, Shafin has made a career out of sharing his love of the sport with others. Whether he's reviewing the latest gear, offering training tips, or simply sharing his adventures on two wheels, Shafin's articles are always informative, insightful, and inspiring. As a local resident of Amana Colonies, Shafin brings a unique perspective to his writing, offering readers a glimpse into the biking culture and community of his home region. So if you're a fellow biker or just a fan of the sport, be sure to check out Shafin's articles – you won't be disappointed.