Installing a new chain - length and direction
Sizing and installing a new chain for your Di2 bike isn't hard, you just need to follow the right steps. This page quickly shows the chain sizing methods and explains chain directionality.
Crankset (1x, 2x)
FC-M5100
Contrary to the XTR MTB groupset, there is no triple XT Front Derailleur. Selecting an XT Crankset is therefore a bit easier.
You either use a Front Derailleur and the FC-M5100-2 crankset, or you don't use a Front Derailleur. In that case you would use the FC-M5100-1 single crankset.
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FC-M5100-2
This crankset has a Q-factor of 178.5mm and a chain line of 48.8mm. It comes with a 36-26T chainrings. It'll work with 135 mm and 142 mm O.L.D. frames.
FC-M5100-1
The single crankset has the same Q-factor of 178.5mm, but a slightly different chain line: 52mm. It is meant to be used with 135 mm, 142 mm and 148 mm O.L.D. frames.
Specifications
- Model code
- FC-M5100
- Series
- XT M8050
- Weight
- 850g
- Chain line
- 48.8mm (2x), 52mm (1x)
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