Does crank arm length really matter?

Crank length can be used as a tool to improve fit related issues impacting comfort, power, and aerodynamics. 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.

Does 2.5 mm crank length make a difference?

I’d say in most cases, your cranks are probably too long. ‘ Burt makes a similar point. ‘The research evidence is clear: crank length makes no difference to power on the road – track is slightly different – unless you go as short as 80mm or as long as 320mm.

Does crank length affect power?

Your power output is determined by torque multiplied by cadence. While longer cranks do produce more torque, they also decrease cadence for a given effort because the turning circle is larger. Likewise shorter cranks produce less torque, but cadence increases for the same effort because the turning circle is shorter.

What crank length is recommended for your inside leg measurement?

Normally fit adult riders should use cranks which measure about 20% of their effective leg length, rounded to the nearest 5mm, whereas growing children can safely increase this figure to 22%. This length goes all the way to your hip joint and cannot be measured directly.

Why are shorter cranks better?

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.

Which is better 170mm or 175mm crank arm?

XC – Possible sizing needed depending on ride lengths, but 175’s are what is recommended for more leverage. Trail/Enduro – 170mm crank arm length is the most commonly used size and is recommended to keep a good leverage ratio and have a bit more ground clearance due to having more travel.

Is 165mm crank too short?

There is very little downside to shorter cranks, so if you find yourself on the cusp between two sizes, always go for the shorter length. 162.5 and 167.5mm are quite rare, so in both cases you may find your best option is to go with 165mm. * Assuming average leg length proportions for your height.

Why short cranks are better?

Are shorter cranks better for knees?

Pain is relieved. Just by installing shorter crank arms, without any other adjustment, the knee at maximum flexion is lowered by 7.5 mm. That difference provides approximately 3° to 4° of relief.

What crank length does Chris Froome use?

175mm
The convention is that the longer your legs, the longer the crank; the shorter your legs, the shorter the crank. Chris Froome at 1.86m in height uses 175mm cranks whereas Nairo Quintana at 1.67m uses 172.5mm, although if you were a bike shop advising him, you’d probably suggest 170mm or even shorter.