The 3 largest cogs are riveted on an aluminum spider. Nickel plated finish. Steel lockring. 12-25, 11-28 and 11-30 are compatible with SS rear derailleur.
The 3 largest cogs are riveted on an aluminum spider. Nickel plated finish. Steel lockring. 12-25, 11-28 and 11-30 are compatible with SS rear derailleur.