Double 10 speed chainset.
39/50 rings
172.5mm cranks
Innovative HollowTech forged crank arms utilise a hollow design that minimises flex and reduces weight.
HollowTech II allows the bottom bracket bearings, in outboard cups, to be spaced wider apart, enabling the use of larger bearings and an increased axle diameter.
Anodised SG-X alloy chainrings
