Shimano Dura-Ace 12 Speed Double Chainset Racks Experience superior comfort in your

Experience superior comfort in your sports activities with ASS MAGIC Chamois Cream

The innovative AutoHead™ automatically swiches between Presta and Schrader valve tyres

• Adjustable nose and arm pieces

even under the most demanding gear changes

Shimano Dura-Ace 12 Speed Double Chainset Racks Experience superior comfort in yourDescription 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