Specialized’s Stumpjumper is iconic. As the first manufacturing mountain motorcycle, the Stumpjumper commenced a revolution in biking when it debuted in 1981. As mountain biking road bike critiques 2024 developed Official link and improved over the many years, the Stumpjumper modified together with it. Specialized reinvented the Stumpjumper generally with distinct substances, new wheel sizes, disc brakes, and the front and rear suspension to meet mountain bikers’ riding wants and needs.
Today, we see the release of the cutting-edge generation of Stumpjumper, proposing an thrilling new shock technology referred to as Genie. By Specialized’s matter, this new motorbike is the fifteenth era of the overall-suspension Stumpjumper platform (as a result, it’s far dubbed Stumpjumper 15). The new motorbike is the satisfactory and maximum succesful Stumpjumper the Morgan Hill, California-based brand ever produced.
It’s no longer straight away apparent, but some thing interesting is taking place within the new Stumpjumper’s surprise. As Specialized states within the motorcycle’s press kit, “Compared to different air shocks in the marketplace, Genie lets in for a decrease spring rate in advance inside the stroke, with a higher ramp later in the ending stroke.”
It attains this with a custom two-stage air spring evolved in-house at Specialized. While Fox manufactures the surprise, Specialized has patents pending in this system. This allows Specialized to probably have the Genie spring built into any emblem’s air surprise.
Specialized isn’t the first to tinker with a multi-stage air spring. Trek’s DRCV (twin rate manage valve) from extra than a decade ago become a two-stage air spring built into a few shocks and even some forks. But the DRCV air spring extent became initially smaller before switching to a bigger-extent air spring partway via the stroke: Genie is exactly the alternative.
For the first 70 percentage of the shock’s tour, the Genie air spring includes the quantity within the principal air chamber plus the air sleeve volume surrounding the shock body. This air sleeve is likewise known as the XV (eXtra Volume) sleeve.
At 70 percent travel, a hoop on the air piston blocks off the ports that permit the principle air chamber to speak with the sleeve’s air chamber, lowering air quantity to most effective what stays inside the eyelet.
And…that’s without a doubt it. The Genie’s air spring volume is extra-greater-massive for this first 70 percentage of tour but reduces to that of a widespread air surprise for the closing 30-percentage.
For this technology, Specialized not most effective made a new motorcycle, but the emblem also reoriented its trail motorbike lineup. The outgoing Stumpjumper line consisted of two motorcycles: the Stumpjumper with 130mm rear journey (with a single pivot/flex stay design) mated to a 140mm fork and the Stumpjumper Evo with 150mm rear journey (the usage of a 4-bar Horst Link layout) and a 160mm fork.
The new Stumpjumper 15 has 145mm of rear journey via Specialized’s signature four-bar Horst Link gadget, mated to a 150mm fork. This model supplants the a hundred thirty/140mm Stumpjumper and the 150/160mm SJ Evo.
“The goal turned into to take the quality attributes of Stumpjumper (snappy and nimble) and Stumpjumper Evo (capable and adjustable) into one platform that catered to a much broader range of riding patterns and terrain,” said Todd Cannatelli, Specialized’s mountain software manager.
And since the new Stumpjumper has no weird standards, this motorcycle might be easy to stay with for a long term. Even if the future famous some big flaw with the Genie surprise (I don’t see that going on, but who knows?) it has standard dimensions and mounting eyelets. So, owners can easily supply a distinct surprise for this body.
I’m irritated at Specialized because the Stumpjumper 15 is so properly carried out that it’s giving me not anything to whinge about. All I got is that the textured finish actually looks as if there has been an errors when the painter tried to apply the clean coat.
Is the new Stumpjumper 15 with Genie the satisfactory trail motorcycle available today? I don’t assume one wishes to attempt difficult to make that case. This motorcycle is dialed. But there are numerous extremely good trail motorcycles on the market from manufacturers big and small. I ought to listing a dozen or more different path bikes I’d fortunately trip. However, in case you forced me to pick out a single motorcycle nowadays, I’d go along with the brand new Stumpy.
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