Shimano Dura-Ace 12 Speed Double Chainset Heart Rate Monitor Acting as a psychological stimulant

Acting as a psychological stimulant

Virtually indestructible Grilamid TR-90 nylon frames keep the supremely stylish Crit lightweight

Its ABS shell and low sides provide you with the protection you need when riding trails

with a light water-resistant treatment to protect you from showers and road spray

Shimano Dura-Ace 12 Speed Double Chainset Heart Rate Monitor Acting as a psychological stimulantDescription 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