Shimano RS910 Bar End Junction-A Box SRAM these are a "B" match

these are a "B" match which indicates that the parts are usable

1 - 4 oz oil blue 0999940

SRAM Red XG1090 10 Spd Cassette - Powerdome X

• COMPATIBILITY: Hayes El Camino hydraulic disc brakes

The Park Tool BBT-19

Shimano RS910 Bar End Junction-A Box SRAM these are a "B" matchShimano RS910 Bar End Junction A Box Frame 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