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Can a 6800 crankset be safely used on a 6700 drivetrain?

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Can a 6800 crankset be safely used on a 6700 drivetrain?

Old 05-20-16, 07:47 AM
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volosong
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Can a 6800 crankset be safely used on a 6700 drivetrain?

Purchased my lady friend an Bianchi Infinito built with Ultegra 6700 the other year. Since the shop was short on parts, they built it up with the incorrect crank length for her body size. She frequently complains about it and I want to put the correct-size crank length on the bike for her, (it is not an option to return to that particular shop for a swap/service).

Since new 6700 cranksets are getting quite rare, I am wondering if I can slap a Ultegra 6800 crankset on the bike without causing any potential problems. The rest of the drivetrain will remain 6700, (i.e., crank would be 11-speed; chain/cassette/RD/FD remain 10-speed). Can this be safely done?

Thank you for your help.
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Old 05-20-16, 07:50 AM
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jimc101
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It will work fine.
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Old 05-20-16, 08:25 AM
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I should work fine but 5700 cranks are still available in double, compact and triple form from a few UK suppliers. Perhaps 6700's are too.
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Old 05-20-16, 09:17 AM
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Originally Posted by HillRider View Post
I should work fine but 5700 cranks are still available in double, compact and triple form from a few UK suppliers. Perhaps 6700's are too.

Thanks guys. Just before posting this thread, I checked Merlin and Chain Reaction. Did notice that they still have a good assortment of 5700 cranks, (and a very few 6700), but since her bike is full Ultegra, I want to try to keep it that way. I might look for something on the Bay too. Her groupo is the "ice grey" color, and all the new stuff is the darker grey. They both look fine, but kinda yucky when mixed.
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