The Prime 9 range of components from Box has made many people rethink what a 9-speed drivetrain is capable of. Box Two is their most durable drivetrain that offers excellent performance, durability, and a competitive weight at a wallet-friendly price point.

Who's this item for: This is for riders looking for all the same range as a 12-speed setup with the simplicity and weight savings of a 9-speed setup. 9-speeds are great for All Mountain style riding but may not appeal to XC racers or those that like to be able to maintain a steady cadence which shifting between gears.

Compatibility All Prime 9 components are cross-compatible with other levels across the range. All of these components can be purchased separately if you want to mix and match with other Box Prime 9 parts.

Works with 10,11, or 12-speed Shimano, SRAM, and most other brands' narrow/wide chainrings (you must use a Prime 9 chain).

E-bike friendly: Yes, The Box Two Prime 9 components are suitable for use on e-bikes when used with the single-release shifter.

The multi-release shifter is not suitable for use on e-bikes.

Each Box Two groupset includes the following components:

• Box Two Prime 9 Speed Twin Lever Shifter
• Box Two Prime 9 Speed X-Wide Derailleur
• Box Two Prime 9 Speed Chain
• Box Two Prime 9 Speed 11-50t Cassette

Rear derailleur Specifications:

• Number of gears: 9 speed
• Weight: 290g
• Materials: Constructed from both hardened alloy steel and stainless steel with a matte onyx finish
• Chain and cassette compatibility: Compatible with Prime 9 chains and cassettes.
• Max cassette range: 11-50t
• Clutch style: Tri-pack limited-slip clutch. Non-adjustable
• Cage length: Available in one length only. It would be a long cage to enable the jump up to the 50t

Compatible with standard derailleur hangers only (not compatible with Direct-Mount hangers)

Shifter / Remote Specifications:

• Number of gears: 9 speed
• Trigger action: Single or multi-shift depending on the option selected.
• Weight: 135g
• Materials: Glass fibre, nylon composite, steel, aluminium alloy.
• Mount style: Hinged 22.2mm bar clamp.
• Shifter cable: Comes with a stainless steel shifter cable included.

Chain Specifications:

• Number of gears: 9 speed
• Compatible with 10,11, or 12-speed Shimano, SRAM, and most other brands' narrow/wide chainrings.
• Weight: 350g
• Materials/Construction: Constructed from hardened alloy steel with a nickel-plated finish. Pins are solid hardened steel.
• Quick joining link: Yes, a quick link comes included with the chain.
• Number of links: 126 links

Cassette Specifications:

• Number of gears: 9 speed
• Weight: 645g
• Materials/Construction: Stamped steel cogs with the largest pinned to a lightweight alloy carrier.
• Cog-tooth span: 11 - 13 - 15 - 18 - 22 - 28 - 34 - 42 - 50t
• Freehub mounting style: Shimano style HG only