Shimano SM-JC41 Di2 Internal Frame Junction Box 4-Port CheckoutSpec= 67mm S x 297 lbs/in }WTB HTZ i30 Rim -

}WTB HTZ i30 Rim - 27

Graphite fiber reinforced plastic bracket body

Designed for kids and kids at heart

LSL bushing and sealed cartridge bearing system

Shimano SM-JC41 Di2 Internal Frame Junction Box 4-Port CheckoutSpec= 67mm S x 297 lbs/in }WTB HTZ i30 Rim -Shimano Di2 Frame Junction BoxFrame Junction Box connects via SD50 E tube wires to four different points: front derailleur rear derailleur cockpit junction box and battery mount All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions Use Di2 system checker to update component firmware from http: e tubeproject. shimano. com