Shimano CS-R7000 105 11-speed cassette 11-30T. The CS-R7000 105 road bike cassette is designed to be light, hard wearing & give you crisp shifting. Shimano 105 is known as the workhorse groupset of the Shimano road bike range. They are known for being super durable & affordable & are ideal for high mileage bikes. The CS-R7000 Cassette uses Hyperglide EV sprockets which are designed to give you crisp shifting. The sprockets are cut away & drilled to reduce weight & nickel plated to avoid corrosion. Features High performance HG-EV 11-speed 105 Road cassette Hyperglide EV sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under load Close ratio gearing allows a more efficient use of energy through finer cadence control Largest sprockets are mounted on a lightweight alloy carrier to reduce weight & increase rigidity Sprockets are cut away & drilled to further reduce weight without reducing rigidity Nickel-plated finish offers hard wearing resistance to corrosion Pearl-bright steel cassette lockring For Super Narrow 11-speed HG-X chains