If you have Dura-Ace 9000 (you lucky dog, you), then you're going to need some new hoops to throw on your bike. As you probably know, when Shimano turned up the volume on Dura-Ace, it went up to 11. Going to 11 speeds meant that the rear hub had to be narrowed to accommodate the extra cog, so the Dura-Ace 9000 11-speed cassette won't fit on a 10-speed freehub (a 10-speed cassette will fit on an 11-speed freehub--you just need an extra spacer). The Shimano Dura-Ace WH-9000 C24 road wheelset was created to address this problem, offering a stiff, lightweight and race proven design that's ready to use with your DA 9000 group.
They feature a wider 20.8-inch rim profile for more stability in the corners, and the low-profile 24mm deep rims are stiff, spin-up quickly and handle well in a cross wind. These are amazing wheels for training, racing and getting wild and crazy on your amazing new set up. These wheels were tested under race conditions by Team Sky during the 2012 edition of the Tour de Frame, and we all know how that went for Mr. Wiggins and co. So if you're looking for the optimal set of wheels for your upgrade, you've found your set.