Shimano E-Tube Di2 External Junction B BoxShimano E Tube Di2 External Junction B Box The Shimano Di2 SM JC40 is designed to connect SD50 E tube wires along four points; front derailleur, rear derailleur, cockpit junction and battery mount. The B Box is used to split the main wire from Junction A to the front and rear derailleurs. It can also be used to connect a seatpost mounted battery to the system. Specifically designed for externally mounted systems and mounts underneath bottom bracket

• MATERIAL: Industrial tool steel• HEX SIZES: 4mm

Küat Racks designs lightweight

Economical and compact

Runtime: Steady 70hrs

Add as a spare or replacement battery to extend your adventures beyond your imagination

Offered in black and white

CLOSURE: Leakproof

104 FEATURES:

NOTE: The Sun Tour® two notch freewheels do not accept the FR-3 remover

The Shimano HG800 11-Speed Cassette features tough steel sprockets that provide superior shifting and exceptional drivetrain performance built onto a carbon/aluminum lightweight spider

Helps to deter rust inside load bar

• Material: Durable metal construction• Compatibility: 1 to 12-speed chains• Usage: Road