Shimano EW-SD50 Di2 E-Tube Wire 550mm MFPN=TC9639 The DLC coating provides a

The DLC coating provides a super smooth surface for optimal stability

Classic-lifetime comfort shapes to your body cool in hot weather

Better modulation

}Pirelli Cinturato Gravel RCX TLR Tire - 700 x 40 Tubeless Folding Tan

The 12-tooth X-SYNC pulley wheel holds the chain in place reducing bounce and chain slap

Shimano EW-SD50 Di2 E-Tube Wire 550mm MFPN=TC9639 The DLC coating provides aShimano EW SD50 Di2 E Tube Wire 550mm. Shimano E Tube wires and connectorsFrame grommets for E tube internal wiring compatible frames are sold separately see Shimano Frame Grommet Kit Electronic Shifter Extra Parts Ultegra Di2 wires utilize Shimanos 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 TECH SPECS Length 550