Shift with confidence and precision using the Shimano RD-R7150 Di2 12-speed road rear derailleur. Its wide 36T compatibility ensures seamless gear changes across a versatile range, powered by a high-performance motor for lightning-fast response. As the central hub of the Di2 system, it combines charging, LED indicators, and adjustment switches into a sleek and compact design. The low-profile construction minimises the risk of damage from impacts, keeping your setup durable and reliable. Whether tackling steep gradients or speeding along the flat, it delivers smooth, effortless shifting for every ride.Features- Compact design includes an integrated wireless unit, charger, switch- LED status indicator- Wider range capacity- Series: Shimano 105- Rear speeds: 12- Top sprocket: Min11T Max.11T- Low sprocket: Max 36T Min 34T

Top sprocket|Min.11TTop sprocket|Max.11TTotal capacity 41TMax. front difference 16T