Campagnolo's all-new Ekar rear derailleur s 1x13 speed specific design has been created especially for gravel and all-road use to create the ultimate groupset for gravel & adventure riding.Only for use with Ekar 1x13 speed groupsetsSuitable for Gravel and All-Road ridingRevolutionary Clutch Lock design for swift and easy wheel removal2D parallelogram trajectory: for precise shifting12T upper and 14T lower jockey wheels for smooth chain running and secure retentionThe combination of more than 70 moving parts are lovingly crafted in carbon fibre, techno polymers and anodized alloys, with stainless steel bolts to meet the demands of gravel and all-road riding. This unique combination of materials creates a derailleur which is lightweight, strong and durable for the rigours of this category of riding. It is able to combine quick, precise and reliable shifting with high chain security and toughness. The Ekar groupset has been designed for short evenly spaced shifts between gears and the 2D