Shimano 2014 Ultegra 10 Speed Road Bicycle Cassette Junior Development CS 6600

Computer designed Hyperglide HG sprockets incorporate specifically positioned shift ramps and tooth profiles for improved chain control during shifting. Fast and responsive indexed shifting is the result. A superior surface treatment of CS 7800 has been applied to the titanium sporockets which increased durability by approximately 30%. Top 3 sprockets are mounted to a lightweight alloy carrier to minimize weight and increase rigidity.