HyperGlide chainrings
CNC-cut and drilled chainrings to reduce weight, not stiffness.
Nickel-plated finish resists corrosion
Corrosion-resistant steel clamp ring
For 10-speed HG road chains.
Ultegra
The 5 largest cogs are mounted on 2 aluminum and composite spiders
Lightweight and high performance
Aluminum locknut
Fini plaqué nickel
Compatible with 10- and 11-speed cassette bodies (for 11-speed, use a 1.85 mm spacer)
Other sizes are only compatible with 11-speed road hubs