Bar Bontrager Pro IsoCore VR-CF Road 31.8mm 44cm Black 2022Bone jarring pavement is no longer an issue thanks to IsoCore technology, an additive to the carbon layup that mutes 20% more vibration than other carbon bars. The Pro IsoCore VR CF road bar. features Di2 compatible ports for clean internal wire routing when integrated with Shimano EW RS910 bar mounted Di2 junction. OCLV Carbon with IsoCore continuous inner laminar technology Replaceable IsoZone EVA pads maintain original grip diameter Variable Radius