SHIMANO ULTEGRA Di2 Shadow Rear derailleur helmet thoughtful build choices

thoughtful build choices

which can boost mental performance

SRAM Motive Bronze 4-Piston brakes feature trail-ready stopping power in a race-ready system

bolts not included)

can all be found in the Chisel Comp EVO

SHIMANO ULTEGRA Di2 Shadow Rear derailleur helmet thoughtful build choicesNow 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