the Sentry MK3 s patented low-profile sidewall and lightweight 6069 alloy construction delivers width without the weight

Improved driving rigidity

4-in-1 spoke wrench and valve extender tool can restore a wheel knocked out of true

Removable Presta valve core

Dura-Ace 9070

SHIMANO JC130 Y-Split Rooting B Junction - 350/50/45mm giant the Sentry MK3 s patentedShimano E Tube wires and connectors Frame grommets for E tube internal wiring compatible frames are sold separately, see Shimano Frame Grommet Kit Electronic Shifter Extra Parts Ultegra Di2 wires utilize Shimano's e tube technology; e tube is a two prong system and is NOT cross compatible with Dura Ace 7970 Di2 wiring All e tube wires may be used for internal or external applications