Shimano Dura-Ace Di2 RD-R9150 Rear Derailleur carted incorporated aspects from the aerospace

incorporated aspects from the aerospace industry and reworked the design to create a premium top wheel

284g (11-28T)

Built-in type Junction-A for specific frame or handlebar end

the Service Course 70 Ergo bar features the distinctive silver finish of Zipp's Service Course lineup

Shimano Dura-Ace Di2 RD-R9150 Rear Derailleur carted incorporated aspects from the aerospaceSystem engineering at its peak. Each of the components magnifies the qualities of the others for an unparalleled level of performance. Optimizing input to maximize output. That's how it achieves supremacy.. Specifications Ergonomic shifting operation without stress SHIMANO synchronized shift Low profile rear derailleur design SHIMANO SHADOW RD Race endurance for less damage in crash Maintains compact and smooth appearance Mfr Claimed Weight 197g