SHIMANO ULTEGRA Di2 Rear derailleur SHIMANO SHADOW RD 2×12-speed RD-R8150 Now 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 Compact design includes an integrated wireless unit, charger, and switch LED status indicator Battery indicator Pairing Adjust mode, etc. Wider range capacity Max. low sprocket: 34T PRODUCT SPECIFICATIONS MODEL NO RD-R8150 SERIES ULTEGRA R8100 Series Color Series color Average weight 262 Remarks w/o Bracket spec. available Rear speeds 12 Top-normal spring type|SHIMANO SHADOW RD ✔ Mount|Direct attachment (conventional) ✔ Mount|Direct mount ✔ Max. front difference 16T Total capacity 39T Low sprocket|Max. 34T Low sprocket|Min. 30T Top sprocket|Max. 11T Top sprocket|Min. 11T Fluoric coated link bushings 4 Pulley|Guide pulley bearing ✔ Pulley|Tension pulley bearing ✔ Pulley|Teeth 11 Pulley|Sunken type pulley screw ✔ B-axle|Hollow axle ✔ B-axle 2|Hollow axle ✔ Di2 connectivity wired|Di2 shifting ✔ Di2 connectivity wireless|Di2 shifting ✔ Di2 connectivity wireless|Bluetooth® LE custom (*1)|Adjust mode information ✔ Di2 connectivity wireless|Bluetooth® LE custom (*1)|Di2 battery level ✔ Di2 connectivity wireless|Bluetooth® LE custom (*1)|Gear position ✔ Di2 connectivity wireless|Bluetooth® LE custom (*1)|SHIMANO STEPS data items (*3) ✔ Di2 connectivity wireless|Bluetooth® LE custom (*1)|Compatible with E-TUBE RIDE ✔ Di2 connectivity wireless|Bluetooth® LE custom (*1)|Compatible with E-TUBE PROJECT ✔ Di2 connectivity wireless|ANT private (*2)|Adjust mode information ✔ Di2 connectivity wireless|ANT private (*2)|Di2 battery level ✔ Di2 connectivity wireless|ANT private (*2)|Gear position ✔ Di2 connectivity wireless|ANT private (*2)|SHIMANO STEPS data items (*3) ✔ Firmware update by E-TUBE PROJECT ✔ SD50 port (pcs) 0 SD300 port (pcs) 1 SD50 connector (pcs) 0 SD300 connector (pcs) 0 LED for system status ✔ Charging port (pcs) 1 Charging cable EW-EC300
