BOX Four Cassette

Yes, as long as your wheelset uses a standard HG (HyperGlide) freehub body. This is the most common freehub standard, making this cassette a straightforward upgrade for many mountain and hybrid bikes.

Prime 9 is Box's approach to drivetrain design, focusing on simplicity and durability by using nine gears with a wide range. It reduces the complexity of your shifting system while still providing the gear ratios you need for climbing and descending.

The steel stamped cogs are built for durability rather than lightweight performance. While they are heavier than aluminum or titanium alternatives, they offer excellent longevity and resistance to wear, making them a reliable choice for daily riding.

Not at all. The larger cogs are pinned together with spacers, which actually makes installation slightly easier by keeping the cluster organized as you slide it onto the freehub body.

The ED (Electrophoretic Deposition) black finish is a protective coating applied to the steel cogs. It significantly improves corrosion resistance, helping the cassette maintain its appearance and structural integrity even when exposed to wet or muddy riding conditions.