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Discussion Starter · #1 · (Edited)
Hello!

Does somone know if the new Shimano R700 10sp Compact Crankset is
compatible with a 9 speeds Ultegra cassette? Does it require a 10 speeds
chain or work will work with my 9 speeds chain?

Thank's :cool:
 

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Shimano will tell you that its not compatible, but I've used their 10-speed compact cranksets with a 9-speed drivetrain on a number of bikes and have had no problems at all.
 

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here's what I think

The crank does not care if the cassette is 8,9, or 10 speeds. And I'd guess the 9 cassette would prefer a 9 chain and the 10 crank won't care about that.
 
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