The Shimano Ultegra is a 10-speed racing bike cassette. It has an 11-23 gear ratio and is compatible with the Shimano body. The cassette has a silver color and belongs to the Shimano Ultegra group (model number 6700). It is suitable for 10-speed bikes and has an HG type. Virtue consists of 11-12-14-15-16-17-19-21-23T. This product is perfect for cyclists looking for smooth, reliable circuits. Brand: Shimano Shimano Group: Ultegra Group code Shimano: 6700 Model code Shimano: CS6700 Model year: NVT Number of speeds: 10 speeds Type of Shimano: Hg Vertanding: 11-12-14-15-16-17-19-21-23T Resistance: 11-23T