Ultegra Di2 RD-R8150 12 Spd. Headset ۢ Double deadbolt locking

ۢ Double deadbolt locking

This can aid in allowing the rider to roll their hips forward for high power output

See Declaration of Conformity for details

aesthetically pleasing shape with ample storage room (9x5x16cm) for your small riding essentials

Ultra-compact mount with durable rubber strap designed to be compatible with various size seat posts and can even be attached to seat stays

Ultegra Di2 RD-R8150 12 Spd. Headset ۢ Double deadbolt lockingNow 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 R9150Compact