The Shimano Dura Ace 9000 crankset has the not-yet-available Dura Ace ‘cross rings with a 46-39 combination. Note that these are not the hollow machined outer chainrings like the versions that come in road sizes. The chainring bolts use nuts that are co

The Shimano Dura Ace 9000 crankset has the not-yet-available Dura Ace ‘cross rings with a 46-39 combination. Note that these are not the hollow machined outer chainrings like the versions that come in road sizes. The chainring bolts use nuts that are covered by the ‘fairings’ you see here. © Cyclocross Magazineundefined