This is the first cassette we made in 2016. It was the time people wanted some more from their one-by drivetrain in 10-42. Still now after the incoming of the 12 speed system, many people prefer or maintain the “old” but still “solid” 11 and choose this model. It’s perfect for gravelling with one-by road system. CNC machined in 2 parts, one in steel and one in aluminium alloy. Both from solid pieces, steel part is heat treated after machining. Aluminium part is hardened with H.A. process.