How to rewrite 40 years of mountain bike history
The prologue was recently made by the Specialized Stumpjumper Evo, which is aimed at customers with an affinity for downhill riding. Now comes the regular Stumpjumper, which could be described as the VW Golf in the trail bike category. The focus of the brand new trail bike is the carbon rear triangle: as before, it does without a Horst link - i.e. pivot point - on the chainstay. Instead, the carbon seat stay on the rear triangle is able to give way. The rear triangle is therefore a single-pivot design that relies on a linkage on the shock. This construction does not apply to the aluminum Stumpjumper, as the aluminum stays do not offer the flex behavior of carbon. For this reason, a Horst link is used on the aluminum Stumpjumper as before.
The new rear triangle and the adoption of design details from the new Evo-Fullie mean that the Stumpjumper Carbon weighs around 100 grams less, a frame in size S4 weighs 2420 grams including paint, shock, all mounting parts, link, carbon shock extension, down tube and chainstay protectors, axle and seat clamp.And: On the Stumpjumper, the suspension travel is 140 millimetres at the front and 130 millimetres at the rear, the wheels are in twentyniner format. As established at Specialized, the new Stumjumper is also based on so-called S sizes. These are not frame heights, but rather frame lengths. This allows the rider to decide how short or long their trial bike should be. And thus choose whether they prefer agile or directional handling. This is made possible by the low-slung top tubes, which make room for long-travel Vario seat posts. The Swat compartment is also still on board, which makes room for a number of accessories in the down tube.
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