Shimano dura ace r9100 power meter 11sp cranksetsetting a new standard in road cycling data collection, this superb crankset features a tough alloy construction which makes it immensely robust as you pedal'. '.strtoupper('c')oming equipped with a revised design, this superb version delivers an iconic appearance which is adapted for race specific disc brake systems while still offering a wide gearing ratio'. '.strtoupper('b')luetooth and ant connectivitydesigned for ease of use, this stunning version is kitted out with both bluetooth and ant connectivity'. '.strtoupper('t')his allows you to easily pair it with your smartphone and favourite apps to view your performance data and results.rechargeable waterproof power meterengineered for all weather conditions, this sleek model is equipped with a waterproof finish which means you can enjoy accurate data results in the wettest of riding conditions'. '.strtoupper('w')ith an integrated rechargeable battery at its heart, you'll benefit from up to 300 hours of pedalling precision'. '.strtoupper('t')his means you can spend less time waiting for it to charge and more time enjoying the ride'. '.strtoupper('f')eatures material alloy use road bcd 96mm speed 11 speed connectivity bluetooth and ant battery integrated rechargeable li on battery battery life 300 hours update wireless firmware update systema 2 year warranty is offered with all shimano products from chain reaction cycles 3 years on dura ace and xtr products.buy shimano components from chain reaction cycles, the world's largest online bike store.