Oldman wrote: . . .I haven't checked this thread in about three months . . . assertion that shorter cranks help . . .
Same tired discussion...
So, I am starting this thread. This thread is for a general discussion of crankarm length. A few posts here and there mentioning extremely short cranks will be tolerated, but they should have their own thread. They are too controversial, and the discussion of short crank lengths blocked out everything else. So, continuing on about them here will be considered off-topic. Off-topic posts are covered in the forum rules.
For those readers who would like a mainstream viewpoint, and advice, on crank length, I think you could start with Lennard Zinn. I do not agree with Lennard on everything, but he is a smart man with lots of experience at what he does, and he is definitely a mainstream expert opinion.
Lennard even answers a question about extremely short cranks in one of those linked posts.
As far as I can tell, extremely short cranks are still an oddity, and they are not considered mainstream theory. They share that distinction with right-angle cranks - at least 3 versions of which I have seen in my cycling career - 2 Italian designs, and one Tiawanese design. Although, the Tiawanese design used the "golden spiral" or the golden curve or some such to design a spiral crank - but it did the same thing as the Italian models. One Italian model made 3 right angle turns before it joined the spider - the other only one, in an "L" shape. But, I'm wandering - they aren't about crank length.
Anyway, for those who want to discuss extremely short cranks - you may start an "extremely short crank" thread, if one does not exist by that time - or you may visit the Powercrank thread, where such discussions may be allowed as being "on-topic".