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Thanks, that is interesting.
I contacted the crankset manufacturer directly that handed me a document where it states "left arm (shim) 12 to 15Nm", I suspected it was for hollow BB and not square for the mention of left arm only and much lower torque compared to what I came across from Parktool or other sources (which seem similar to what you posted, around 35 Nm), but when I raised the interrogation on is it really 12 to 15 Nm, manufacturer did not answer back.
35 Nm seem to be a value that is recommended on several places so I guess this will have to do...!
thank you for the help
paulbiche-
Cheers. Like you said, 12-15 is the torque for pinch bolts on left-hand hollowtech cranks.
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30Nm has always worked for me, never had a square taper arm come loose.
I find that giving self-extracting hex-driven crank bolts much more welly than that runs the risk of deforming the hex head itself.
I’ve also found a very thin film of grease on the tapers helps fully seat them without excessive force, despite this being often frowned upon for some reason.
Adhiero
ectoplasmosis
Yep, was looking for a link for you, I’d misread your question and answered the torque for a BB.
35-50Nm, so a good amount of power to generate with a 10” Allen key.
https://si.shimano.com/pdfs/dm/DM-MDFC001-00-ENG.pdf