Old 09-13-13, 08:17 AM
  #3  
joejack951
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Bikes: 2016 Hong Fu FM-079-F, 1984 Trek 660, 2003 Specialized Hardrock, 2004 LOOK KG386i (RIP), 2005 Iron Horse Warrior Expert, 2009 Pedal Force CX1, 2016 Islabikes Beinn 20 (son's)

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Originally Posted by dbg View Post
The specs say 68 or 73 BB shell but I had problems using this exact model on an older trek-850 (with 68 shell and 130 rear drops). There were not enough spacers to get it installed with the correct and balanced extensions on both sides. I set it aside and ordered a road crank (tiagra I think) because I wanted the best Q. I have since installed it into a 73 BB shell and it fit perfectly.
How many spacers did you try to use for the 68mm shell? The crankset/BB should have included three 2.5mm spacers for use with a 68mm shell and a standard (non-E-type) front derailler. How many spacers did you use for the 73mm shell? There should be only one on the drive side.

To the OP, the Deore crank should swap in just fine. You might not even need to adjust your front derailler if you get lucky enough. Read the instructions and install the appropriate spacers to ensure proper preloading of the bearings and chainline. A 68mm shell gets one 2.5mm spacer on the non-drive side and two of the same spacer on the drive side.
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