Square Taper to Octalink

JackN

Dirt Disciple
Help needed here please. My Marin Mount Vision has a knackered square taper BB with a cheap and nasty crankset. I've got a nearly mint Shimano XT Octalink crankset. The square taper is English thread x 123 mm. The nearest Octalink BB is 121 mm, would this be a direct replacement or do I need to go shorter since I'm converting the Marin to 1 x 10 ? Thanks in advance.
 
Re:

All you need to know is the frame shell width (68 or 73) and then match the bottom bracket length to the crank arm model (not what you had before).
 
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