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Discussion Starter · #1 ·
Just picked up these crank arms on clearance from merlin cylces, one of the only shops that still ships Shimano from the UK/EU.

https://www.merlincycles.com/shimano-xtr-race-m9000-crank-arms-129551.html

One up, absoluteblack, and wolf tooth sell 30, 32, and 34 single rings for them. One up oval is currently $45 on Jenson and the One Up website; the others are ~$65. These are non-boost 49mm chainline, race crank arms with a low q 158 factor. Weight is ~470g bare and ~520g with a single ring. Not the lightest compared to current gen spindle-less carbon crank arms such as RF Next or X01/XX1, but about 100g less than similar priced XT/SLX/GX Dub.
 

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Discussion Starter · #4 ·
Chain Line: 48.8mm. Boost or non-boost. I only ask is b/c merlin lists only one model available. XT is available in several different configs.
The m9000 are non boost only. I believe the only boost version is the "trail" FC-M9020-B1 with a 52mm chainline. I use 49mm chainline on my SC TB3 (boost spaced) with GX eagle without any issues, but YMMV depending on your bike. May lead to premature chain wear? Wolf Tooth says it may not matter depending on your use case:

https://www.wolftoothcomponents.com/pages/boost-chainline-and-chainrings
 

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Discussion Starter · #6 ·
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