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Old 07-27-16 | 06:44 PM
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Seizedpost
Bench vise user
 
Joined: Jul 2015
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Bikes: 2004 Orbea Marmaloda, 1982 S12-S LTD, 1956? Maino, 1985 Sagres

Should crank be centered?

Hello all,
I am trying to build a 1985 Fuji Sagres with a Sugino Maxy crank (which is not original, I'm replacing the original crank). I currently have a 118mm UN55 bottom bracket installed.

The drive side crank is 40.5mm from the seat tube, the non-drive side is 47.5mm from the seat tube, and the inner 40t chain ring clears the chain stay by less than a millimeter.

What's going on? How should the crank be positioned, why is it so off center, and what do I need to do to fix it?
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