Shimano Dura-Ace 12 Speed Double Chainset Heart Rate Monitor So you can shred hard

So you can shred hard

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

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

QSkin yarn: highly wicking with antimicrobial properties

The T-RexGrip is a new way of getting grip on your sprocket

Shimano Dura-Ace 12 Speed Double Chainset Heart Rate Monitor So you can shred hardDescription 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