The Shimano Dura Ace 11-speed chainring for the FC-R9100 crankset
The Shimano Dura Ace FC-R9100 11-speed chainring has a uniform 110 mm bolt circle for various 2x combinations. It is also compatible with the Dura Ace power meter. The large chainrings (50 to 55 teeth) have a hollow profile (Hollowglide) for greater rigidity and lower weight.
Application: Road, Triathlon & Time Trial
Mount: 110 mm pitch circle, 4-arm asymmetrical
Teeth: 34 t, 36 t, 39 t, 42 t, 50 t, 52 t, 53 t, 54 t, 55 t
Combinations: 34-50 t, 36-52 t, 39-53 t, 42-54 t, 42-55 t
Material: aluminium (34 t to 42 t), aluminium/carbon (CFRP, 50 t to 55 t)
– Dura Ace FC-R9100
– Dura Ace FC-R9100-P
The large chainrings of Dura Ace and Ultegra have a hollow profile. This not only reduces weight, but also increases stiffness. The shifting process is faster and even more precise.