1.00 mm wall thickness. High quality butyl rubber tubes. Consistent butyl content ensures long term air retention. Reinforced valve stems. All tubes are pre-inflated for 24 hours to guarantee air retention.
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.