Campagnolo Cass CPY S Record 11S Freewheel Cog Sizes: 11 x 23 t, 11 x 25 t, new 11 x 27 t, new 11 x 29 t, 12 x 25 t, 12 x 27 t, 12 x 29 t Cog Material: chrome-plated steel, titanium Carrier Material: aluminum Hub Type: Campagnolo Claimed Weight: 177 g