Shimano Dura-Ace 12s Chainring 50-34T

Shimano Dura-Ace 12s Chainring 50-34T:

• -The HollowTech II 12-speed Dura-Ace chainset offers the optimum balance of light weight and rigidity, making it the global choice for road racing’s elite riders
• -Hollow outer chainring, giving vast improvements in rigidity and increased weight savings
• -The hollow outer chainring has essentially removed outer chainring flex, hugely improving shift performance making it precise even under high load
• -These industry leading HollowTech II 4 arm cold forged hollow crank arms have been evolved to increase rigidity, reduce weight, and improve strength
• -The teeth have been developed to work only in conjunction with the 12-speed chains for improved contact providing more efficiency and improved power transfer
• -HollowTech II integrated bottom bracket design uses a wider bearing placement and larger axle diameter for increased stiffness and efficiency
• -Bottom bracket seal design has a minimal bearing interface gives superbly smooth rolling and increased durability