Shimano RD-R9250 Di2 REAR DERAILLEUR, DURA-ACE, 12-SPEED, TOP NORMAL, SHADOW DESIGN, DIRECT ATTACHMENT (DIRECT MOUNT COMPATIBLE) P5010341-P5010363 ease of installation and better

ease of installation and better cooling for long service life

Communication Range: ≤82ft (25m)

It's clean

Nighthawk AX8 Extender creates a seamless network throughout your home by using the same WiFi network name (SSID) as your router

Box Weight: 88 lbs

Shimano RD-R9250 Di2 REAR DERAILLEUR, DURA-ACE, 12-SPEED, TOP NORMAL, SHADOW DESIGN, DIRECT ATTACHMENT (DIRECT MOUNT COMPATIBLE) P5010341-P5010363 ease of installation and betterCAGE LENGTH One Spec TOTAL CAPACITY 37T MAX FRONT DIFFERENCE 16 COLOR SERIES COLOR AVERAGE WEIGHT 215g MOUNT Direct attachment (conventional) NUMBER OF PULLEY TEETH 11 SERIES Dura Ace GENERATION R9200 MAX LOW SPROCKET 34T MIN LOW SPROCKET 28T REAR SPEEDS 12