11-25D

105 Finish: nickel Made of steel 1 mm spacer included

Ultegra Light alloy sprocket carrier 10-speed compatible * Weight: 208 g

For HG chain  Fini plaqué nickel

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