Shimano
Dura Ace 7700 9sp Cassette - 12T Upwards

• Lightweight alloy sprocket carrier reduces cassette weight while increasing sprocket stiffness and improving shifting performance
• Largest two or three sprockets (depending on size range) are made of lightweight titanium, and the remainder are nickel plated chrome-moly steel for strength
• 9-speed cassette is same width as 8-speed for hub interchangeability
• Supplied with a lightweight alloy lockring
• Weight - 160g 12-23 cassette