Ultegra Di2 RD-R8150 12 Spd. Headset and wedges to maximize performance

and wedges to maximize performance benefits

ۢ Double deadbolt locking

Overall safety check

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

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

Ultegra Di2 RD-R8150 12 Spd. Headset and wedges to maximize performanceNow 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