Upgrading drivetrain
wrbc
Posts: 3
I bought my wife a Motobecane Fantom DS Trail and I want to upgrade the drivetrain parts on her bike. The bottom bracket she has now is a FSA BB-7420ST-122.5 and crankset is a Shimano FC-M391-L, 175mm, 44/32/22. It is currently a 3X9 speed and I would like to change it to a 1X11 speed. I want to upgrade to a Shimano SLX or XT crankset, chainring, cassette, and rear derailleur. Will I need a different bottom bracket and if so, what specs do I need to look for to fit an SLX or XT crankset?
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Comments
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You need a BB that matches your crankset. Shimano cranksets come with an external BB.I don't do smileys.
There is no secret ingredient - Kung Fu Panda
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Parktools0 -
Thank you. I guess I just need to find out what size bottom bracket fits my frame.0
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99% sure it'll be 68mm, or 73mm, the BB in HTII cranksets comes with spacers for both sizes.I don't do smileys.
There is no secret ingredient - Kung Fu Panda
London Calling on Facebook
Parktools0
