Why 170mm cranks

Going back to our definition, if we reduce restriction than power output can increase. Aerodynamics: Going to a shorter crank will allow you to ride at a lower back angle which minimizes frontal surface area improving aerodynamics. It can be frustrating to know that there are many available crank options that would work for an athlete.

Trying to decide between a and mm crank is a waste of time as there is too small of a difference to matter. An athlete should pick the length that allows them to most comfortably apply force to the pedals without restriction. This is why in the future, I think manufacturers will start making crank lengths in 5 to 10mm increments.

Based on tradition, I think the , I imagine there is a manufacturer cost component to consider here as well. To summarize, athletes are free to select a crank length that promotes comfort, power, and aerodynamics knowing that the actual length of the crank will not impact power production or efficiency.

Mat Steinmetz is the founder of www. BY Mat Steinmetz. Crank Length When I present on the topic of crank length, I begin by asking where crank length came from. Moving to a shorter crank can improve: Comfort: A shorter crank length reduces range of motion at the knee extension and flexion , hips, and low back. It seems like a rider would just adapt their riding and get a little lower, thereby negating that small gain. Maybe the "ground clearance" argument is just an little afterthought of an argument that people seize onto.

All rights reserved. Mobile Version of Website. Posted: Feb 19, at What are your thoughts on crank length for all mountain riding? Is the trend going to shorter cranks? Standard seems to be but many companies are opting for short cranks. Canyon specs the Strive with only mm cranks while Transition specs mm across most of there bikes.

The Giant Reign is size dependent for crank length. Should crank length change based on size of bike like chainstay length to maintain balance? Let me know your thoughts! Shorter cranks are stronger, lighter, better clearance, and arguably faster acceleration. I have a strive with s and a couple fixed gear road bikes both with s. So, why would you change your crank length? If shorter cranks provide better ground clearance, why would anyone run longer crank arms?

Mechanical advantage is what longer crank arms provide, and mechanical advantage is speed. Longer crank arms mean more leverage, and thus more power when pedalling. This topic has 25 replies, 18 voices, and was last updated 12 years ago by darrell.

Viewing 26 posts - 1 through 26 of 26 total. Posted 12 years ago. I have one of each on my bike. How tall are you? Are you long legged or short legged for your height? Swiftacular Free Member. MountainMonkey Free Member. Hope that helps! If you have anymore questions please feel free to ask! Reluctant Free Member.