BOX Four Single Shift Shifter - 8-Speed BlackBOX Four Single Shift Shifter 8 Speed Black. The BOX Four 8 Speed Shifter takes advantage of the "less is more" drivetrain philosophy and exploits durability simplicity and reliability. Engineered with BOXs "8 is Enough" drivetrain philosophy Fast action release lever Extruded clamp 2 piece pull lever Resin top shell TECH SPECS Color Black Designed for ebike Yes Drivetrain Speeds 8 Rear Der Shifter Compatibility BOX 8 Speed Shifter Style Trigger