The SRAM PG-1030 10-Speed 11-28T Road Cassette uses Powerglide II technology for ultra-smooth and efficient shifting. The tooth profile, ramp design and positive index shifting all come together to deliver a reliable and accurate shifting experience. Key Features: - 10 Speed - 11-28 Teeth - 11,12,13,14,15,17,19,22,25,28 - Durable Nickel Chrome Finish