Problem Solvers Under Stem Mount - Shimano Di2, 17 degree, Black Kids Bikes Compatible with Shimano 12-speed chains

Compatible with Shimano 12-speed chains require the use of Wolf Tooth's Compatible with Shimano 12-speed specific chainrings

and Pro4 hubs

173827-Q0-L

176104-Q0-L

Keep your fork clean and dry with a new boot

Problem Solvers Under Stem Mount - Shimano Di2, 17 degree, Black Kids Bikes Compatible with Shimano 12-speed chainsThe Under Stem Mount allows riders to secure a Shimano Di2 Junction Box to their bike quickly and easily without the need for zip ties, duct tape, or other unreliable attachments. Lightweight alloy headset spacer with nylon body (9g) Compatible only with Shimano Di2 Junction Box 95mm length, 44mm width, 6mm height Product Specifics Today's Stock Status 4 Available to ship in 2 4 Business Days UPC: 708752322806 EAN: Not available Manufacturer Part