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Chains are chains are chains. Some work better with certain drivetrains than others, but besides that it's all the same, right? Welllllll maybe not. Shimano's Dura-Ace CN-7901 Chain is a slightly different breed, with numerous refinements that make it lighter, crisper, and smoother than most other chains out there. First of all, it's 11g lighter than its predecessor, courtesy of hollow pins and perforated inner and outer plates. It's also asymmetrical, which might sound weird, but it actually makes it move to bigger rings faster and more smoothly, so there's no drag or delay when you need to change up. It also helps the CN-7901 stay silky smooth and quiet, so you can sneak up people and blow past them before they even hear you coming.

  • Hollow pins
  • Perforated inner and outer plates
  • Asymmetrical design
  • Compatible with Shimano Dura-Ace FC-7900 and FC-7950 cranksets and Dura-Ace FC-7900 front derailleur
  • Reviews
  • Q & A

What do you think about this product?

Have questions about this product?

One of the best

  • Familiarity: I've put it through the wringer

This is right up there with the new KMC high end chain (the black one), always have good life and great shifting. I use it with sram red/force and the shifting is always smoother when compared to a sram chain. I would get a quick link to make cleaning a bit easier but overall very good chain.

Must-have for Di2 configurations

  • Familiarity: I've put it through the wringer

This asymmetric chain is the best chain for Di2 bikes, and the best chain Shimano ever made. It is incredibly quick and sharp, with no drama. It's durable, much more durable than past Shimano chains. I have tried the Ultegra and Wipperman 10S1 chains on DA 7970 Di2 and Ultegra 6770 Di2, and this DA chain is noticably better than the others.



Do yourself a favor and buy a Connex quick link and use it with this chain so you can remove it for cleaning. (It will last a lot longer, and if you can run it through an ultrasonic parts washer you will be greatly rewarded.) Both the Connex link and the Shimano chain are directional, so pay attention when you are installing it. (Shimano name plates facing out on the chain. Point the longer, more elegant curve on the Connex link toward the gear teeth.)

Shimano Dura Ace CN-7901 10-Speed Chain

    Awesome chain, lightweight, nice and durable. It is very compatible with all the Shimano 10-Speed range, and also SRAM too. When I used SRAM components in the past, I ran Dura-Ace or Ultegra drive train. Dura-Ace is slightly more expensive, but a bit lighter.
    This is a great, strong chain, and you will never have to worry about snapping one of these in a sprint.

    Unanswered Question

    I have 10 speed compact crank ultegra new cassette Cs-6700 11-23t

    I bought wrong chain ultegra 11 speed oops

    So asking

    Better to stay ultegra 10 speed chain or go up to dura ace?

    I have this one in now actually has lasted much longer by shore didn't rust got 2nd season out of it.

    Any advice?

    Love my chain need new wondering which is way to go!!

    Thanks

    Kim

    Unanswered Question

    I have seen mixed info on whether this...

    I have seen mixed info on whether this chain works with Shimano dura ace 7800 10sp crankset, derailleur. I need to replace my old 7800 12-25 cassette and dura ace chain and was going to purchase the 7901 chain and pair it with a 12-27 7900 casette. Would that work/be compatible?

    can i install a 7901 shimano chain and use...

    can i install a 7901 shimano chain and use a master link or does it have to be pinned solid

    will this chain work a dura ace 5speed...

    will this chain work a dura ace 5speed freewheel, stonglight double free wheel and shimano 600 arabeqsue front and rear derailleurs?

    Will this chain, the 7901, work on double...

    Will this chain, the 7901, work on double Ultegra 6700 cranks and Ultegra 6700 short cage rear derailleurs?

    What is the difference between the 7900,...

    What is the difference between the 7900, and 7901?

    The Dura-Ace CN-7901 box says that it is...

    The Dura-Ace CN-7901 box says that it is to be used for a double chain ring only. I have a tripple> Why won't it work.

    Best Answer

    Technically it will work though for the best shifting performance Shimano recommends using the 7901 chain with double cranksets only and 10 speed cassettes. Ten speed chains are narrower than 9 speed but do work on those drivetrains. You run in to more problems using wider chains on 10 speed systems.

    Just be sure to install the chain with logos facing out as it is directional.

    How well do these Shimano asymetrical...

    How well do these Shimano asymetrical chains work with SRAM chainrings? I'm sure Shimano recommends using them only with their own rings, but has anyone tried them on SRAM? I'm using Sram Rival components, but want to try Ultegra (6600) cassette. Thanks.