DCTech T45 Ceramic for Shimano cranks is for cyclist who demand the best in performance and durability even on the toughest trails. Thanks to our Dual Cup Technology (DC Tech) and our top quality ceramic bearings, you will experience the smoothest of rides, no matter how rough the road gets

See the assembly instructions and spacer list here.

For a correct compatibility, mountain cranks should be always mount on mountain frames and road cranks on road frames.