So i am aware off the reasoning behind shorter cranks for tri. But is it worth it, or of benefit for pure tt? I.e. when not worrying about saving your running legs.
Yes.
I think a secondary question is, if the answer to the first question is yes, is it there a case for a longer TT crankarm length when compared to tri crankarm length (acknowledging that both are shorter than road length)?
Yes.
Why? 😆
I think a secondary question is, if the answer to the first question is yes, is it there a case for a longer TT crankarm length when compared to tri crankarm length (acknowledging that both are shorter than road length)?
Well said.
What i get is that shorter allows for more ideal hip angles when in a very low position. And shorter saves the legs for the run. If i am not running, is there advantage to going a bit longer?
Shorter crank arms generally put you in a better position.
Here is an oldie, but a goodie: https://www.slowtwitch.com/Tech/Crank_arm_lengths_for_tri_727.html
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Crank length has nothing to do with running. It’s all about your position on the bike.
Bingo!