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SUS420 Press Cutting stainless steel gears, fixed on 7075 alloy carrier, smallest three gears are removable 11 & 12T (single), 14T (single), others are fixed with SUS rivets Shimano / Sram 10-speed compatible Gear range of 11/12/14/16/18/21/24/28/32/36; Only 11-36T range is available for 10-speed SUS cassette Material: AL7075 carrier - stainless steel teeth and rivets