View Full Version : Need some quick bottom bracket install help!
simplemind
04-23-2018, 08:11 PM
I have a frame with an English 68mm shell. I am installing an XT crank (https://bike.shimano.com/en-US/product/component/deorext-m8000/FC-M8000-1.html) (1X11) and was told to use an XTR SM-BB93 (https://bike.shimano.com/en-EU/product/component/xtr-m9000/SM-BB93.html) bottom bracket, which is compatible with 68 or 73mm shells.
Included in the package was three spacers, all alike. What would be the correct way to install those spacers to get the correct chainline? I'm guessing two on the drive side and one on the NDS, but I'm clueless. :eek:
kppolich
04-23-2018, 08:14 PM
Start on page 11
http://si.shimano.com/pdfs/dm/DM-FC0002-12-ENG.pdf
simplemind
04-23-2018, 08:22 PM
Start on page 11
http://si.shimano.com/pdfs/dm/DM-FC0002-12-ENG.pdf
Thank you. I did see that document earlier but became confused on page 11 where it shows "(A) BB mount-type bracket", wth is that (I don't think I have one).
kppolich
04-23-2018, 08:27 PM
I would follow this diagram.
https://farm1.staticflickr.com/885/26791536957_334b05fbdd.jpg
or start at 1:45 here:
https://www.youtube.com/watch?v=v5Frlk-kFXc&t=12s
vqdriver
04-23-2018, 08:29 PM
Thank you. I did see that document earlier but became confused on page 11 where it shows "(A) BB mount-type bracket", wth is that (I don't think I have one).
i believe that's for bb mounted front deraileurs
if you're using a traditional clamp or braze on fd, it doesn't apply
i did trial and error and ended up 2 ds and 1 nds
simplemind
04-23-2018, 08:33 PM
I would follow this diagram.
https://farm1.staticflickr.com/885/26791536957_334b05fbdd.jpg
or start at 1:45 here:
https://www.youtube.com/watch?v=v5Frlk-kFXc&t=12s
Simple enough! thanks!
i believe that's for bb mounted front deraileurs
if you're using a traditional clamp or braze on fd, it doesn't apply
i did trial and error and ended up 2 ds and 1 nds
Ahh, that makes sense, thanks!
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