Shimano Dura Ace Di2 12 Speed R9270 Disc Brake Groupset - 172.5 50/34

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Shimano Dura Ace Di2 12 Speed R9270 Disc Brake Groupset - 172.5 50/34The Shimano Dura Ace 12 Speed Di2 Disc Brake full groupset is the pinnacle of Shimano technology. Dura Ace R9200 Di2 is the fastest ever electronic groupset and features wireless technology for a clean cockpit. For their benchmark 12 Speed Dura Ace Di2 Groupset Shimano took cycling's fastest electronic shifting system and made it even faster. Utilising an exclusive wireless protocol to increase shifting speeds without sacrificing any of the precise,

setting the rider apart from the pack

close ratio gearing allows a more efficient use of energy through finer cadence control

weight: 327g / 330g

Shimano's Wide link Shadow design Dyna-Sys 10-speed top normal Deore rear derailleur allows for efficient and smooth shifting

Serviceable cup and cone bearings add to long life of the pedals

Extra wide bearing surface for a much more efficient power transmission

Weight: 228 grams

Material: Nylon 26 TPI

Nylon bead-to-bead protection

Front and rear pair

This gives both better rolling resistance (a faster ride for the given rider power input) and better puncture protection as the tyre is able to deform more quickly around sharp offending objects

Low profile aerodynamic direct mount Super SLR-EV Dual-Pivot design provides superior brake performance and light action

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