The X10-93 features a variety of performance-enhancing technologies and strengthening features this chain is one of the most durable on the market. The Non-Directional design makes it independent of direction which allows maximum compatibility on MTB or Race bikes. With its unique stretch-proof treatment the durability has been enhanced massively by reducing the attrition between the inner plates and pin. As a result chain life has been significantly prolonged. The upper bridge forms a slant vault parallel to the tip of tooth movement. This vault shape makes the tooth and chain engage much more precisely. 1/2' X 11/128' - 122Links pin length 5 88 mm Shimano Sram and Campagnolo compatible Including all 10X MTB systems Half Nickel plated NON-Directional Hi-Performance Extremely Durable