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Shimano Dura-Ace CS-7900 chainset review

Super-stiff stunner

Our rating 
4.5 out of 5 star rating 4.5
GBP £440.42 RRP | USD $673.84
Shimano Dura Ace CS-7900 Chainset

Our review

One of the stiffest chainsets we’ve ever ridden
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The cold-forged aluminium alloy Dura-Ace crankset comes with a new hollowed out chainring. The chainring bolts slot through the inner chainring and screw directly through the spider and into the outer chainring. Shimano claim this design is 20 percent stiffer than any of their previous cranks.


The tooth profiles on the chainrings have been redesigned to reduce wear and improve efficiency, not only when shifting, but also when transferring power from the chainring to the chain.

The bottom bracket has stainless steel bearing units as usual, but with new seals with less drag than previous versions. The chainset weighs in at 739g, including bearings.


On the road this is one of the stiffest feeling cranksets we’ve ever ridden. Only Cannondale’s Hollowgram SI system and the THM Clavicula cranks are comparable in terms of how stiff they feel when pedalling.

Product Specifications


Name Dura Ace 7900 Double Chainset (09)
Brand Shimano

Weight (g) 739
Chainring Size (No of Teeth) 39 42 53
Crank Arm Lengths 165mm 170mm 172.5mm 175mm 177.5mm 180mm
Chainring Options Double