One bike for everything: The brand new Specialized Stumpjumper 2025

Successful Specialized Stumpjumper: How it all began

1981: A small brand called Specialized launches a bike that drives the world into the woods and the press crazy: The first Stumpjumper marked the birth of an entire scene - and an icon. Because 43 years later, the Stumpjumper is more alive than ever. Full-suspension, in its iteration and better than ever before. Four decades of optimisation, always with the same goal: to bring more control, performance and fun on trails and off-road and to bring fun to the trails and into the hearts of riders. And with every development leap, every breakthrough by our Specialized Ride Dynamics team, with every landing on the trail. Smoother. Faster. Safer. Our latest coup? GENIE. The air damper technology that fulfils the three biggest wishes of our riders: An almost "unbreakable" ride feel of a steel spring - plus the finest adjustability. Adjustability. Stumpjumper 15: This is more than just a facelift. This is what is technically feasible. Maximum control, expertise and customisability. The best trail bike in the world - still.

The new Stumpjumper 15 from Specialized

Trail frames are like conventions: The stiffer they are, the more likely they are to break. That's why we designed the frame for the Specialized Stumpjumper 15 with a certain amount of compliance - because a bike has to adapt to the trail and not the other way round. Made from FACT 11M carbon and M5 aluminium, the bike forms a single unit from front to back - with the perfect stiffness ratios. How do we know this level? From decades of development work and thousands and thousands of data sets. A core objective of the Stumpjumper 15 was to utilise materials and design as efficiently as possible. Even through apparently counter-intuitive measures: For example, "wasting" a few more grams of material on the deflection rocker - which culminated in a more efficient, because stiffer, design than the previous sidearm concept. The result? Almost telepathic handling with even less mass.

The geometry

The geometry of this bike delivers big bike virtues on demand, a feather-light, agile steering feel in tight sections and enormously efficient climbing behaviour. The central, spacious cockpit centres the rider for the best possible traction and cornering control. The low bottom bracket, the slack head tube angle and the optimised fork offset offer child's play balance even in difficult terrain and the choice between aggressive corners, flowing turns or precise, fast inside lines. Three different rear triangle dimensions depending on the frame and therefore also the rider's height further optimise handling.

With its integrated geometry customisation options, the Stumpjumper 15 takes fitting to a new level: six individual settings allow riders to perfectly adjust the ergonomics and efficiency of their bike according to their preferences and terrain. The special, eccentrically shaped upper headset shell allows the steering angle to be adjusted between 63° and 65.5° in three positions, while the bottom bracket can be moved up or down 7 mm as required by rotating the Horst Link FlipChips by 180° - to shift the centre of gravity downwards or increase ground clearance.

Frame sizes

No two riders or trails are the same. So why think in terms of off-the-peg bike sizes when S-sizing is available? Six frame sizes with similar head tube lengths and standover heights, but designed not just for body size, but also for riding style and terrain. Smaller S sizes offer a more agile, playful riding experience thanks to a shorter reach and front centre, while the larger sizes provide more stability and a fuller ride feel.

Stumpjumper: Mullet or Full 29er

Individual wheel size, same geo It's a question of taste: large wheels for better rollover behaviour and more momentum or a smaller rear wheel for more playfulness? In the aftermarket, we offer the right rocker links for the different combinations. So that riders can ride 27.5 or 29 inch wheels on the rear axle without changing the geometry or suspension characteristics of the Stumpjumper 15.

GENIE prank? The rear end

GENIE is a completely new innovation patented by Specialized for air shocks with PSA technology (Pneumatic Spring Assist). Its simple but ingenious mode of operation can probably best be described as a "chamber play in two acts": Divided into two separate, positive air chambers connected via channels, the larger air volume provides a soft damping characteristic on the trail in the first 70 % of the spring travel. If the shock compresses above this threshold value, the special GENIE band closes the openings to the outer air chamber, thus reducing the air volume and reacting much more progressively in the last 30 % of travel. This massively reduces the probability of bottoming out compared to conventional air dampers. The perfect balance of air and steel spring damping in one package - and also individually adjustable.

Carbon copy? No, thank you!

39 % less violent bottoming out than conventional air shocks The harder the hits, the more GENIE's "silent reserve" unfolds its full potential: In the last 30 % of the spring travel, the damping resistance increases progressively - thus reducing potential bottoming out and its intensity.

Success curve

Compared to other air shocks on the market, GENIE offers a noticeably and measurably softer spring stiffness in the initial stroke, which only rises steeply in the end range (see graph). The "softer" GENIE air shock in the Stumpjumper 15 utilises 14 mm more travel than its EVO predecessor with the same impact energy (1080 Nm) and is therefore on par with the Enduro (100 mm). Ultimately, this means: superior shock management equals more ground contact equals better controllability on the trail. The graph below compares the impact force and the available travel between the Stumpjumper EVO and the Stumpjumper 15. It's clear to see: GENIE uses up to 16.3 % more travel for the same impact energy - and reacts even faster than the shock in the Stumpjumper EVO.

All models in the check

S WORKS STUMPJUMPER 15

• Frame, rear triangle and rocker arm made of lightweight FACT 11m carbon.
• The lightest high-end MTB wheels from Roval, the Traverse SL II with DT Swiss 240 hubs.
• FOX FLOAT Factory with GENIE damper technology and Ride Dynamics Tune. With lever for open and firm compression mode and 3 different compression modes in the open position.
• Additional customisation options with spacers.
• FOX FLOAT 36 Factory suspension fork with GRIP X2 damper cartridge. Customisable with spacers.
• Robust and precise SRAM XX Eagle Transmission AXS drivetrain.
• SRAM Maven Ultimate brakes, each with 4 pistons and superlative braking power.
• RockShox Reverb AXS, smooth and reliable dropper seatpost.
• Lifetime frame warranty when registered within the first 90 days of purchase and a set of replacement bearings
• Price: 13000 Euro

SPECIALIZED STUMPJUMPER 15 PRO

• Frame and rear triangle made of lightweight FACT 11m carbon.
• The lightest high-end MTB wheels from Roval, the Traverse SL II with Industry Nine 1/1 hubs.
• FOX FLOAT Factory with GENIE damper technology and Ride Dynamics Tune. With lever for open and firm compression mode and 3 different compression modes in the open position. Additional customisation options with spacers.
• FOX FLOAT 36 Factory suspension fork with GRIP X2 damper cartridge. Customisable with spacers.
• Robust and precise SRAM X0 Eagle Transmission AXS drivetrain.
• SRAM Maven Silver brakes, each with 4 pistons and superlative braking power.
• With the BikeYoke REVIVE MAX, saddles seem to disappear into every seat tube thanks to the low stack.
• Lifetime frame warranty when registered within the first 90 days of purchase and one set of replacement bearings for the rear triangle per year. Both are only valid for the first buyer.
• Price: 9500 Euro

STUMPJUMPER 15 ÖHLINS COIL

• Frame and rear triangle made of lightweight FACT 11m carbon.
• Roval Traverse Alloy with DT Swiss 370 hubs are our most robust and reliable aluminium wheels.
• First-class rear suspension with Öhlins TTX 22 M steel spring shock absorber in Ride Dynamics Tune. Plough through root fields and rock gardens with the Öhlins RXF38 m.2
• Suspension fork and 160 mm travel.
• Robust and precise SRAM GX Eagle Transmission AXS drivetrain.
• The levers of the powerful TRP DH-R EVO brakes, each with 4 pistons, are incredibly ergonomic for your fingers.
• The stroke of the lowerable seat post PNW LOAM can be customised.
• Lifetime frame warranty when registered within the first 90 days of purchase and a set of replacement bearings
• Price: 8500 Euro

STUMPJUMPER 15 EXPERT

• Frame and rear triangle made of lightweight FACT 11m carbon.
• FOX FLOAT Performance Elite with GENIE damper technology and Ride Dynamics Tune. With lever for open and firm compression mode and 3 different compression modes in the open position. Additional customisation options with spacers.
• FOX FLOAT 36 Performance Elite suspension fork with GRIP X2 damper cartridge. Customisable with spacers.
• Roval Traverse Alloy with DT Swiss 370 hubs are our most robust and reliable aluminium wheels.
• Robust and precise SRAM GX Eagle Transmission AXS drivetrain.
• SRAM Maven Bronze brakes, each with 4 pistons and superlative braking power.
• The stroke of the lowerable seat post PNW LOAM can be customised.
• Lifetime frame warranty when registered within the first 90 days of purchase and a set of replacement bearings
• Price: 7500 Euro

STUMPJUMPER 15 Comp

• Frame and rear triangle made of lightweight FACT 11m carbon.
• Robust aluminium wheels from Specialized with sealed industrial bearings in the hubs.
• FOX FLOAT Performance Elite with GENIE damper technology and Ride Dynamics Tune. With lever for open and firm compression mode. Additional customisation options with spacers.
• FOX FLOAT 36 Rhythm suspension fork with GRIP damper cartridge. Customisable with spacers.
• Robust and precise SRAM S1000 Eagle Transmission AXS drivetrain.
• SRAM Maven Bronze brakes, each with 4 pistons and superlative braking power.
• Reliable XFusion Manic dropper post. Lifetime frame warranty when registered within the first 90 days of purchase and one set of replacement bearings for the rear triangle per year. Both are only valid for the first buyer.
• Price: 6500 Euro

S WORKS STUMPJUMPER 15 FRAMESET

Price: 4500 Euro