TheShimanoDura-Ace CompactChainset-HollowTechIIoffers the optimum balance of light weight and rigidity, making it the global choice for elite riders. ShimanoDura-Ace CompactChainset-HollowTechII Features The HollowTech II 11-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...
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