Shimano EW-WU111B Di2 Wireless Transmitter Unit - 3rd Group Black MFPN=BBT-35 2") and a taller headtube

2") and a taller headtube (now 5")

Compatible with Shimano style SPD cleats

Wheel Diameter:    150 mm / 5

For tires up to 42mm wide

Shimano EW-WU111B Di2 Wireless Transmitter Unit - 3rd Group Black MFPN=BBT-35 2") and a taller headtubeShimano's EW WU111B D Fly wireless unit connects inline to a Di2 E TUBE system enabling the use and connectivity of ANT+ and Bluetooth LE compatible accessories. It also allows the use of SHIMANO's smartphone and tablet E TUBE PROJECT software for maintenance and system updateCompatible with Shimano Road Di2 systems Compatible with Garmin Edge 1000 and PRO SCIO ANT+ cycling computer Powered by Di2 shifting system battery Dimensions: 38mm x 25mm x 12.