NEW BOX Three Prime 9 9-Speed Cassette eBike 12-50t, type_cassettes-freewheels-cogs Six largest sprockets have a

Six largest sprockets have a double frame system resulting in increased torsional stiffness for faster

800mm width - adjustable to 740mm

Simple installation by just removing the screws from the bottom

15x100mm axle

NEW BOX Three Prime 9 9-Speed Cassette eBike 12-50t, type_cassettes-freewheels-cogs Six largest sprockets have aThe Box Three Prime 9 cassette is a great all around cassette option. All cogs are stamped from steel and subsequently, the larger ones are pinned to alloy spiders. It also features weight reducing holes on the cogs. The Box Three Prime 9 offers ultra wide ratio with consistent progressions Prime 9 technology offers the same range as a 12 speed drivetrain, with fewer gears to shift through Fewer parts, reduced weight, and increased durability Cogs