Shimano R9100 Dura-Ace 172.5mm Crankset Size:52-36 while the backlit button indicates

while the backlit button indicates charge status and low battery

it incorporates a full complement of balls for 35-40% greater load capacity than standard radial bearings

75mm and 50

and touring cyclists

Its Bluetooth connectivity allows seamless integration with various devices

Shimano R9100 Dura-Ace 172.5mm Crankset Size:52-36 while the backlit button indicatesExperience the pinnacle of cycling performance with the Shimano R9100 Dura Ace 172. 5mm Crankset. Engineered for the demands of professional racing, its iconic 4 arm construction and optimized crank arm design deliver exceptional rigidity while shedding 7g, weighing in at a mere 609g (50 34T). The innovative chainring tooth profile is specifically adapted for race bike disc brake systems and accommodates shorter 410mm chainstays with 135mm OLD rear