Senior Member
Join Date: Jan 2014
Location: The banks of the River Charles
Posts: 2,032
Bikes: 2022 Salsa Beargrease, 2020 Seven Evergreen, 2019 Honey Allroads Ti, 2018 Seven Redsky XX, 2017 Trek Boon 7, 2014 Trek 520, 2006 Gary Fisher Montare
Mentioned: 19 Post(s)
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Once I used an Ultegra 6800 11 speed crank on a bike with an otherwise 10 speed 105 5800 drivetrain. Worked flawlessly. Not what you asked though.