Cassettes & freewheels

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)

For HG chains Fini plaqué nickel Drilled sprocket for reduced weight

Pour chaînes IG/HG Chrome‑plated finish Pignon ajouré pour plus de légèreté

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

For IG/HG chains Fini plaqué nickel Pignon ajouré pour plus de légèreté

CARACTÉRISTIQUES DU PRODUIT Number of teeth: 11, 13, 15, 17, 20, 23, 26, 32 11, 13, 15, 17, 20, 23, 26, 30 Technologie : PowerGlide II Locknut material and finish: Steel Cog material and finish: DuraBlast

Gear range suitable for all riders Léger Crosspieces in alloy & reinforced carbon-polymer fiber, 5 titanium sprockets