It shouldn't be an issue. The internal diameter of an 11 speed chain is the same as a 10 speed one, so I've had no problems running a 10 speed chain set with an 11 speed transmission.
@andyp started
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It shouldn't be an issue. The internal diameter of an 11 speed chain is the same as a 10 speed one, so I've had no problems running a 10 speed chain set with an 11 speed transmission.