This post is about options for crankarms with lengths outside the "normal" range -- particularly those shorter than 170mm -- available in the UK.
You may be wondering why this question even comes up. For many of you, crankarms in the most commonly available lengths (e.g. in the 170-175mm range) suit you just fine.
But -- if you:
(a) are a woman and/or
(b) are shorter than, say, 5'8" and/or
(c) have proportionately short femurs and/or
(d) suffer from arthritis or other chronic conditions of the hips, knees or ankles...
then you may just find that slightly shorter cranks fit better, give you more power and efficiency and perhaps cause less pain.
But -- if you:
(a) are a woman and/or
(b) are shorter than, say, 5'8" and/or
(c) have proportionately short femurs and/or
(d) suffer from arthritis or other chronic conditions of the hips, knees or ankles...
then you may just find that slightly shorter cranks fit better, give you more power and efficiency and perhaps cause less pain.
