# Ultegra SL HollowTech II chainset offers a fine balance of light weight and rigidity with incredible shifting performance
# HollowTech II allows the bottom bracket bearings to be spaced wider apart (outboard the frame) enabling the use of larger bearings and an increased axle diameter
# There is also the benefit of easier installation , adjustment and maintenance
# Lightweight and rigid steel bottom bracket axle
# SG-X aluminium anodized chainrings 50-34T (FC-6650 compact)
# Aluminium chainring bolts

* Lightweight HollowTech II 105 10-speed double chainset
* Innovative HollowTech forged and anodised aluminium crank arms utilise a hollow design that minimises flex and keeps the weight low
* HollowTech IIallows the bottom bracket bearings to be spaced wider apart (outboard from the frame), enabling the use of larger bearings and an increased axle diameter
* The system allows for easier installation, adjustment, and maintenance
* Lightweight anodised SG-X aluminium chainrings for smooth and precise shifting