Nice, thanks. Yeah, that is an interesting read. So the conclusion from bringing all those separate studies together is that overall power and efficiency don’t vary much with different crank lengths. Fair enough.
But….
The article still doesn’t deal with comfort / fatigue / cramp over long 4...
And I’d love to go for the crank lengths that I like, but bike manufacturers don’t allow it; they make the BB height too low for XL frames. All of them. So I’m forced to take the same crank as short riders.
I would really love to get a bike designer guy on this forum who could explain the rational….
Yeah, that’s what I mean - the leg raise up wouldn’t be as high. Means you don’t get the full range of muscle use and leverage. Thought experiment - imagine doing a tough 4 hour ride on a bike with cranks that were taken from a kids bike, so your pedals are going round in a tiny 12 inch radius...
Thanks for replying, tho not sure I agree. ‘Assuming you stick to crank length designed for the bike’… But they’re designing all frame sizes to have the same crank length, which to my mind is self evidently wrong. ‘Leg fit has more to do with frame size and dropper post size’. Not really - Of...
That’s interesting. All road bike manufacturers do this too. But seemingly nowadays E-MTB bike makers just don’t bother. Short or tall, you get the same BB height and crank length. It’s really frustrating, and I just don’t get it.
Bottom brackets and crank arm lengths are indeed the same for all frame sizes. Exactly my point. The question is why. Why do taller bigger riders have to put up with either a) unacceptable amount of pedal strikes, or b) unacceptablly mismatched crank arm length?
I have a real beef about crank arm lengths on all E-MTBs. Here’s the thing; all E-MTB bike manufacturers stick to the same sized crank arm across all of their frame sizes. You don’t get this in the road biking world, so what’s going on?
It doesn’t take an Einstein to figure out that the...