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

So you can shred hard

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

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

- Die casting aluminium body

Set comprises of two pulley wheels and is a genuine Shimano replacement part

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