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I need to know the crank size from the trek scratch air 9 2011. They are atlar fr cranks and are 175mm in length but are they 68/73mm bb or are they 83mm?
I need a definite answer so no guesses please
Posted : 18/03/2014 9:33 pm
I had one. 73mm.
Posted : 19/03/2014 3:04 am
I think...well I'm sure it wasn't 83mm anyway.
Posted : 19/03/2014 3:05 am
Definitely 73mm. Probably
Posted : 19/03/2014 5:23 am