Les 3 plus gros pignons sont montés sur un croisillon en aluminium
Nickel-plated finish
Contre-écrou en acier
The 12-25, 11-28 and 11-30 cassettes are compatible with SS rear derailleurs
11-32 cassettes require a GS rear derailleur * Weight: from 269g (12-25) to 320g (11-32)
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