Bang up to date – the geometry of the 2021 Stumpjumper Thanks to the short seat tubes, you can choose a frame based on its length. Specialized call their sizing concept style-specific sizing. The jumps in reach between the frame sizes vary between 20–25 mm. If you’re 1.73 m tall, you can choose between a total of three sizes. To make this possible, the American brand have kept the seat tubes extra short, ranging in length from 385–465 mm, which also allows them to spec longer dropper posts for more freedom of movement. The S stands for style because you’re meant to be able to choose the frame size based on your preferred riding style, not the length of your legs. Specialized offer the new Stumpjumper in a total of six sizes from S1 to S6. Your riding style determines the frame size, not the length of your legs Instead, the seat stays flex to provide the necessary movement. You won’t find a Horst Link pivot on the new Stumpjumper. Due to the generally lighter spec with thin-walled tires, a shock without a reservoir and the FOX 34 fork, the new S-Works Stumpjumper weighs only 12.2 kg, a full kilogram lighter than the previous S-Works model we had on test. According to Specialized, the frame weighs 2,420 g, including the shock, axle, seat clamp and other hardware. With the help of this and other weight-saving measures, the frame is 100 g lighter than its predecessor. By getting rid of the bearing required for the pivot, Specialized were able to save 55 g. This means the carbon seat stays flex during compression. Specialized have foregone the Horst Link pivot on the rear stays of the 2021 Stumpjumper, relying on so-called flex stays instead. Not only have the kinematics been revised and the travel reduced, but the carbon frame has also been weight-optimised. One of the main goals in the development of the new Stumpjumper was to make it lighter and more efficient than its predecessor. Nice! Lighter and more efficient thanks to the flex pivot on the carbon Stumpjumper The cables are routed through internal sleeves and don’t rattle. The chainstay protector effectively dampens chain slap, keeping your ride quiet.

Pivot swat game