The Shimano SW-RS801 Dura-Ace Di2 12-Speed Climbing Switch Shifter is crafted for Shimano Dura-Ace Di2 12-speed systems, offering smooth and precise shifting on tough climbs. It includes a 260mm cable for easy installation and features a lightweight, durable construction for lasting performance. Its ergonomic design ensures comfort on long rides, making it essential for cyclists aiming to enhance their climbing skills. SKU: ISWRS801T.