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
Review: Shimano Dura-Ace 9000 groupset | road.cc
Shimano 9000 Dura-Ace Series Mechanical Groupset - SoCalCycling.com - Southern California, Cycling, Amgen Tour of California, News, Bicycle Racing, Fun Rides, Cycling Event Calendars, Cyclocross.
Shimano Dura Ace 9000 Crankset Power Meter | Bikeinn
Hands On Bike: Shimano Dura-Ace 9000 vs R9100: Crankset