BBS02 creaking

[KirstinS]

Ok. Sorry to resurrect but I am now 100% clear in my mind on the issue

It was the crank arms massive q factor. I bought a brand new set of cranks. Same q factor. Fit them with a torque spanner and creak is same. So not worn cranks

Fit the original bbs arms and it vanishes

The only possible conclusion i see is my titanium frame with a bbs mid drive and cranks with large q factor exerts twisting forces that the steel bbs and the Ti frame flex differently. Leading to huge creak

 

[downy8]

Are you tightening them up enough? I torqued mine to 45nm and they still started creaking due to coming undone again... I have just thread locked them in and so far so good but only time will tell....
Rob.

 

[KirstinS]

Are you tightening them up enough? I torqued mine to 45nm and they still started creaking due to coming undone again... I have just thread locked them in and so far so good but only time will tell....
Rob.

Yup , been there and done that ! Including using a torque wrench to get exact

Its defo the specific, large q factor cranks and , presumably, the extra torsion they produce