SHIMANO RD-R8150 REAR DERAILLEUR ULTEGRA DI2 12 SPEED musette while the patented Body Geometry

while the patented Body Geometry channel is optimized to assure proper blood flow to sensitive arteries

Free from parabens and formaldehyde

and it's compatible with SWAT™ solutions for tool and storage integration

while the geometry features an ultra-low standover that makes it easy for your little ones to fit on and grow with the bike

SHIMANO RD-R8150 REAR DERAILLEUR ULTEGRA DI2 12 SPEED musette while the patented Body GeometrySKU Description Our fastest ever rear shifting, 58% faster than RD R9150 LED status indicator Battery indicator Pairing Adjust mode, etc. Wider range capacity Max. low sprocket: 34T Product Description With our fastest, most accurate shifting, the new 12 speed ULTEGRA R8150 rear derailleur is more versatile than ever thanks to a single cage length option that is compatible with 28 34T low sprockets.