Feature: 12 dB noise reduction over Dura Ace Precise gear shifting Aerodynamic Wattage saving Lightweight design Single-guide plate construction Suitable for: Shimano Dura Ace 9100 / 9150 / 9170, Ultegra 8000/8050, support up to 32T flywheel/Cassette. Shimano Dura Ace 9200 12spd / Ultegra 8100 12spd, Support up to 34T flywheel/Cassette. Name: The Oversized Pulley Wheel Model : Carbon Hollowcage, Ceramic bearings 12/18t wheels Colors: Multicolor, Black, Weight: 71g fit Road Bike. Road Bike Pulley Wheels HollowCage Carbon For Shimano 9100/8000 11 Speed 12/18T. 12 dB noise reduction over Dura Ace. Suitable for: Shimano Dura Ace 9100 / 9150 / 9170. Ultegra 8000/8050, support up to 32T flywheel/Cassette. Shimano Dura Ace 9200 12spd / Ultegra 8100 12spd. Support up to 34T flywheel/Cassette. Name: The Oversized Pulley Wheel. Model : Carbon Hollowcage, Ceramic bearings 12/18t wheels. Note:The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of our monitor and light brightness. We will reply question within 24 hours.