SHIMANO ULTEGRA Di2 Shadow Rear derailleur helmet Spray straight onto your drivetrain

Spray straight onto your drivetrain to get rid of grime

and new shifting logic for smooth

Thoroughly rinse drive chain area before application

It helps add variety into your fueling without compromising the absorption rate of the carbohydrates

If the sun is shining and the roads are dry

SHIMANO ULTEGRA Di2 Shadow Rear derailleur helmet Spray straight onto your drivetrainNow simplified with a single derailleur cage length, the new 12 speed Shimano ULTEGRA R8150 rear derailleur packs our fastest, most precise shifting into a more approachable option. 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. FEATURES Our fastest ever rear shifting, 58% faster than RD R9150