Box Four 8 Speed Wide/Narrow Chainring spinimages=211 The Box Three Expert Front

The Box Three Expert Front Hub is a lightweight version of the Pro sized counterpart

Hub includes Steel Bolts

Available as a multi-shift (pull several gears at once) or single-shift shifter (a sound choice for e-bikes)

References:

it remains the most durable cassette in the range

Box Four 8 Speed Wide/Narrow Chainring spinimages=211 The Box Three Expert FrontThe Box Four Wide Narrow chainring completes that package for the 1x8 system. It is the first 8 speed specific chainring designed to optimize chain retention when using 8 speed chains. The tooth profile and thicknesses are tailored to match the inside geometry of the unique Box Four chain. SUPPORT MATERIAL View Prime 9 Drivetrain Compatibility Manual How is the Ebike variant different? View Prime 9 Comparison Chart Why Prime 9?