The Box Four range is for those people who just want less fuss! You're fond of Prime 9, but know 8 is enough, and surely 12-42T is plenty of range for an 8-speed cassette. The Box Four derailleur still has the Limited Slip clutch but now arrives with a more compact cage. The custom 8-speed chain is built for abuse, although it's sophisticated enough to have its own wide/narrow chainring.

Who's this item for:

• The multishift option is perfect for riders on regular mountain bikes looking to simplify their maintenance and riding experience. Fewer gears mean less time with the bike in the work stand and more on the trails.
• The single shift option is for e-bikers looking for a robust and reliable option for use with electric motors.

Important note: The multishift option is not compatible with e-bikes

Number of gears: 8-speed

Weight:

• Shifter: 128g
• Derailleur: 328g
• Cassette: 473g
• 116 Link Chain: 364g

Materials: Glass Fibre, Nylon Composite, Steel, Aluminium, Alloy

Shifting options:

• Multi-Shift: Suitable for use with normal human-powered bikes
• Single-Shift: Suitable for use with e-bikes and human-powered bikes

Chain and cassette compatibility: Compatible with HG Freehub bodies and standard derailleur hangers (Non-Direct-Mount)

Chainring compatibility: For the best performance and chain retention Box recommend you use a narrow/wide 11-speed chainring. This will best match the internal geometry of their chains and provide you with the best riding experience.

They recommend the following brands: Wolftooth Components, Raceface, One Up Components, Absolute Black.

Max cassette range: 11-42T

Clutch Style: Limited Slip clutch