R8000/R9100 R9150/R7000 SERIES:
The overall power savings of the System for Shimano 9100/9150 /8000 reach 30%-60%, or more in some cases, over a stock setup.
The oversized pulley wheels have 3-5 times longer lifetime than the commonly used standard pulleys on the market.
The Shimano 9100/9150 and 8000 8050 system is compatible up to a 32 tooth cassette for both Dura Ace & Ultegra derailluers.
Please note: The System for 9100/9150 and SS 8000 8050 is compatible with Ultegra 8000-GS or 8050-GS (medium cage) derailleurs, nor with the clutch equipped Ultegra RD RX800 & RX805.
Pulley Wheels: 13-tooth upper and 19-tooth lower
Pulley Wheel Material: Aluminium