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I am refreshing my drive train. I have been running a full 105 5600 set for a couple years. I have an ultegra cassette and chain ready to fit, and I am consdiering crankset/chainring options. Is the new 105 5700 hollow tech compatible with my 5600 Bottom Bracket?

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Short answer?

Yes, you can. Any Hollowtech 2 Bottom Bracket is compatible with any other Hollowtech 2 crank set.

There is no difference in size or function between the 5600 BB and the 5700 BB.

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  • Thanks Zenbike. I thought that would be the answer. It is cheaper (with better availability) for me to buy a crankset than chain wheels.
    – Greg
    Mar 7, 2012 at 21:23
  • If you are satisfied, can you please accept the answer?
    – zenbike
    Mar 16, 2012 at 19:41

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