This super narrow chain is compatible with 10-speed road drivetrains, and specifically designed for Shimano's road groups. Not compatible with 9-speed systems or Shimano 10-speed MTB systems. Requires special chain connection tool TL-CN23/CN32. Weight 304g (116 link). SRAM/Shimano 10-speed compatible.
B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.
The product weight specified is an approximate weight based on the manufacturer's specifications (if available) or our measurement of one or two examples. For most products, the weight will typically vary by 5% to 10%.
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Reviewed 1/3/2017
by Old Man On Wheels
Cycling Enthusiast
Vancouver, WA
Value Rating
Overall Rating
6 of 6 customers found this review helpful.
Excellent chain for a triple - use instead of CN-6701
Excellent chain for a triple crank. Has lateral flexibility and shifts well. It is the same as the Dura Ace chain for triples which was discontinued - apparently the only difference is that the 6600 is less expensive. My equivalent Dura Ace chain lasted 2500 miles to the point of 116 in. wear over 12 links. I am a heavystrong rider.
Note do not use the CN-6701 for a triple. It is laterally stiff and will wear the top two cogs of the cassette out in only a few thousand miles. It will also not shift as well on a triple due to it's stiffness.
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Reviewed 11/29/2021
by jwellborn
Cycling Enthusiast
Shreveport, LA
Value Rating
Overall Rating
Shimano drive trains deserve Shimano replacement parts
Shimano chains are built to match and work with the Shimano drive train. There is a difference in the shifting quality with this chain, it is better.
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Reviewed 4/5/2012
Cycling Enthusiast
Fla. Montreal
Value Rating
Overall Rating
3 of 7 customers found this review helpful.
so far so good
I can't give much info as I only have about 1000Km on it but so far so good
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Reviewed 9/6/2018
by Drew
Cycling Enthusiast
Sacramento
1 of 2 customers found this review helpful.
Shimano Chains a Great Value
This chain is a great value. I've spent a lot more on high-end chains (Wipperman), but I get almost as much mileage, and better shift quality, using Shimano chains on Shimano drivetrains. I prefer to use the recommended CN-7801 chain on my triple, but it often isn't in stock, so I use this CN-6600 as an alternative. Honestly, I can't tell the difference. They both work great. I can typically get 4K-6K miles on this chain with regular lubrication and monitoring for chain stretch.
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Reviewed 8/20/2018
by Nomad 98012
Cycling Enthusiast
Mill Creek, WA
1 of 2 customers found this review helpful.
A quality Ultegra level chain for use on triple chain rings.
Used on a Dura Ace 7800 Triple Crank set 523930 with an 1130 cassette. Works superbly!
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Reviewed 8/20/2018
by Nomad 98012
Cycling Enthusiast
Mill Creek, WA
1 of 2 customers found this review helpful.
A quality Ultegra level chain for best use on triple chain rings.
Used on a Dura Ace 7800 Triple Crank set 523930 with an 1130 cassette. Works superbly!
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Bike chain compatibility guide for all of the major bicycle parts manufacturers
