Few bikes can claim such iconic status. The Specialized S-Works Stumpjumper 15 EVO carries one of the most famous names in mountain biking history. Last year’s group-test champion returns with 160/145 mm of travel, the new FOX FLOAT X GENIE shock and a hefty €12,499 price, ready to fight for the trail bike crown once more. Is that enough to hold off fierce competition in 2026?

You can find an overview of this group test here: The best trail bike of 2026.

Specialized S-Works Stumpjumper 15 Evo | / Wh | 160/145 mm (f/r)
15.32 kg in size S4 | € 12,499 | Manufacturer website

Apple have the iPhone, Porsche have the 911, and Specialized? The Stumpjumper. Few bikes have shaped mountain biking quite like this classic from Morgan Hill, so expectations run high whenever a new generation lands. The S-Works Stumpjumper 15 returns as defending champion from last year’s group test, and it arrives with a few subtle changes. The EVO spec increases front travel to 160 mm, while the new FOX FLOAT X GENIE shock with piggyback reservoir aims to combine the sensitivity and traction of a coil with the progression and reserves of an air shock.

Despite its premium spec, the flagship S-Works model we tested tips the scales at 15.32 kg in size S4, which puts it merely mid-pack in terms of weight. An S-Works has never been cheap, but at €12,499, the Stumpjumper pushes the limits even in this high-end test field, making it the most expensive non-motorised bike in this group. So, has Specialized’s Californian recipe still got the flavour to take another test win, or have rivals served up something better?

Spec and details of the Specialized S-Works Stumpjumper 15 EVO

The Stumpjumper is one of the best-looking bikes on test, and the appeal holds up on closer inspection. Balanced proportions, flowing tube shapes and an organically symmetrical design give it a genuinely elegant look.

The build quality is equally impressive. Cables are internally routed and neatly guided, unused ports are sealed with rubber plugs, and the high-quality plastic components feel reassuringly robust. A chain guide comes as standard. Specialized have clearly paid close attention to frame protection, too. Extensive protective films on the downtube and all areas exposed to rock strikes complement the substantial, bolted-on dual-compound downtube protector. Made from two materials of different densities, it absorbs impacts while shielding the frame from damage.

The bolted flap between the main frame and rear triangle is another neat detail. It doesn’t rub against the paint and reliably keeps dirt from collecting between the two. The chainstay protector also works effectively and extends onto part of the seatstay. We would only have liked a little more protection on the underside of the chainstay. Unfortunately, the Stumpjumper also lacks torque markings on the bolts, which would make workshop jobs that bit easier.

The large SWAT storage compartment in the downtube is another highlight. The flush-fitting cover sits seamlessly in the frame, even if it’s not colour-matched as on some rivals. There is plenty of room for an inner tube and additional tools, and even a standard OneUp 100cc EDC pump fits without issue. The internal pouch appears waterproof and keeps everything organised inside the frame, though we would have liked a second one to separate the contents more effectively. The opening lever could do with a little more grip, too. Less impressive was the conspicuous amount of carbon dust we found inside our test bike. On the plus side, the SWAT tool in the steerer, chain tool included, is always at hand and saves you rummaging in your backpack out on the trail.

Specialized have pulled out all the stops with the spec. Up front, a FOX 36 Factory fork with GRIP X2 damper controls 160 mm of travel, while a FOX FLOAT X Factory GENIE shock manages 145 mm of travel at the rear. The two work brilliantly together and offer plenty of adjustments. Shimano XTR brakes with 203 mm rotors front and rear deliver powerful, reliable deceleration. Shimano also supply the drivetrain, the electronic XTR Di2 drivetrain.

Ready for fast trail laps
Lightweight Roval carbon wheels meet a well-matched Butcher T9 and Eliminator T7 tyre combo. Spot on!

The FOX Transfer Neo dropper offers 200 mm of travel and plenty of freedom of movement, although it can’t be inserted fully into the seat tube. The cockpit combines a smart Race Face Turbine R stem with 800 mm ERA carbon handlebars. The lightweight Roval Traverse SL II carbon wheels are fitted with two 29″ tyres from Specialized: a Butcher in the soft T9 compound up front and an Eliminator in the firmer T7 rubber at the rear, both in the GRID TRAIL casing – a well-judged combination for the bike’s intended use.

Tuning-Tip: If you don’t get on with the Shimano XTR rear derailleur, you should choose a different spec option.

Helmet Troy Lee Designs A3 MIPS | Glasses 100% Speedcraft | Shirt Troy Lee Designs Flowline SS | Shorts Troy Lee Designs Skyline | Knee pads Troy Lee Designs Stage | Shoes Specialized | Socks Stance Basic Crew | Gloves Troy Lee Designs Air

The geometry of the Specialized S-Works Stumpjumper 15 EVO

The Specialized S-Works Stumpjumper 15 EVO is available in six sizes, S1 to S6. At 470 mm, the reach of our size S4 test bike is slightly more compact than that of many of its rivals, but it’s paired with a tall stack height of 644 mm. Together with the slack 64° head angle and steep 76° seat angle, this gives the Stumpjumper a well-balanced geometry.

As you’d expect from Specialized, the Stumpjumper 15 EVO also offers plenty of adjustment options. Interchangeable headset cups let you vary the head angle between 63°, 64° and 65°, while a flip chip in the chainstay changes the bottom bracket height, allowing you to adapt the geometry of the bike to different trails. The 435 mm chainstays grow with the frame size to ensure balanced weight distribution across the entire size range. We rode the Stumpy with the head angle in the middle setting and the flip chip in the low position.

The Stumpjumper doesn’t deal in extremes. Instead, it hits the sweet spot between agility and composure better than almost any other bike in the test.

The Specialized S-Works Stumpjumper 15 EVO on the trail

The Stumpjumper starts scoring points before you’ve even hit the trail. Specialized provide a detailed setup guide on their website, and it’s impressively accurate. Unlike with some other manufacturers, we barely had to tweak the recommended base setup and felt comfortable on the bike straight away.

How does the Specialized S-Works Stumpjumper 15 EVO perform on the climbs?

Uphill, the Stumpjumper is one of the strongest bikes in the entire test field. The rear suspension is highly efficient under power, remaining almost completely pedal neutral, and making the Stumpy one of the most efficient climbers in the test as a result. At the same time, the rear end generates plenty of traction on technical climbs, allowing the rear wheel to track cleanly over roots and ledges.

Put in the effort on the climbs, reap the rewards on the descents: thanks to its pedal-neutral rear end, the Stumpjumper racks up the vertical metres willingly and pays you back with heaps of fun on the way down.

Despite the relatively tall front end, you’re nicely integrated into the bike and can put plenty of power through the pedals. The riser bars create a slightly more upright and comfortable riding position, and yet this has very little impact on climbing performance. Alongside the Yeti MT and Atherton A.130.1, the Stumpjumper ranks among the best analogue bikes in the entire test field on the climbs, slotting in just behind the even stronger Santa Cruz Tallboy.

How does the Specialized S-Works Stumpjumper 15 EVO perform downhill?

The Stumpjumper is one of those bikes that inspires confidence from the very first pedal strokes and feels incredibly easy to ride. Rather than demanding attention with an extreme character, it impresses with excellent balance. The Stumpjumper integrates you pleasantly low and centred between the two 29″-wheels, while the tall front end inspires real confidence. Handling is extremely intuitive and right up there with the best bikes in the test field. Direction changes come effortlessly, and the Stumpjumper responds just as eagerly to spontaneous line changes.

From the very first berm, the Stumpjumper feels like it’s been your home-trail bike for years.

At the same time, it strikes an impressive balance between agility and composure. In fast, rough high-speed sections, the Stumpy feels remarkably settled, surpassed only slightly by the Trek Fuel+ EX and Cannondale Bad Habit. The compliance of the carbon frame is particularly noticeable, filtering out vibrations in a forgiving way. As a result, the handling feels more comfort-oriented than razor-sharp. The tall front end occasionally requires you to consciously weight the front wheel in flatter corners, but rewards you with plenty of confidence on steep trails.

The suspension is every bit as impressive and ranks among the best in the entire test field. Both the fork and rear suspension are extremely sensitive off the top, while providing plenty of support through the mid-stroke and making full use of the travel without harsh bottom-outs. The bike rewards an active riding style, generates plenty of pop off kickers and edges, and encourages you to pump every rise in the trail. That makes the Stumpjumper one of the most convincing trail bikes in the test field. It’s neither extremely playful nor relentlessly planted, but hits a hugely entertaining sweet spot somewhere in between. Combined with the intuitive handling, that inspires loads of confidence from the very first crank spin, putting a massive grin on your face in the process.

As impressive as the Stumpjumper is on the trail, its noise levels are a real disappointment. The Shimano XTR Di2 rear derailleur constantly makes itself heard on rough trails. When the rear suspension extends quickly, the B-screw audibly strikes the derailleur hanger, producing a loud metallic clatter that dominates the riding experience. On a bike at this price point, that simply isn’t acceptable.

The Stumpjumper’s premium credentials go far beyond the S-Works logo, with plenty of clever details throughout.

Who is the Specialized S-Works Stumpjumper 15 EVO the right trail bike for?

The Stumpjumper is aimed at riders looking for a trail bike that does everything well. It climbs brilliantly, inspires huge confidence on the descents and combines one of the best suspension setups in the test with intuitive handling. The only real fly in the ointment is the noise, which noticeably detracts from an otherwise outstanding ride.

Conclusions about the Specialized S-Works Stumpjumper 15 EVO

The Specialized S-Works Stumpjumper 15 EVO is one of the most complete trail bikes in this group test. It pairs one of the best suspension setups on test with outstanding pedalling efficiency and exceptionally balanced handling that inspires confidence from the get-go. This makes it all the more frustrating that the unacceptable noise from the Shimano XTR Di2 drivetrain and the dropped chains tarnish an otherwise superb overall package. Without this flaw, the Stumpjumper would have had an excellent chance of defending its title. As it stands, it misses out on the test win by the narrowest of margins, but remains one of the best trail bikes of the year.

For more information, visit the Specialized website at Specialized.

The Test Field

You can find an overview of this group test here:
The Best Trail Bike of 2026

All bikes in test: AMFLOW PX Carbon Pro, Atherton A.130.1, Cannondale Bad Habit 1, Pivot Trailcat LT Pro X0, Propain Hugene 3 CF Ultimate, Raymon Tarok Ultimate, Santa Cruz Tallboy, Specialized S-Works Levo R, Specialized S-Works Stumpjumper 15 Evo, Trek Fuel EX 9.9 XO AXS Gen 7, Trek Fuel+ EX 9.8 XT Di2 Gen 2, Yeti MT XO.

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Words: Benedikt Schmidt Photos: Mike Hunger