Specialized grants rider's wishes with the release of an alloy Stumpjumper 15 featuring its Genie shock tech and good old mechanical shifter routing

Specialized has announced a more affordable alloy Stumpjumper 15, the metal tubed frame shares numerous features of the existing carbon model and comes with three shock options.

Specialized released the latest edition of its best trail bike back in July, the new Stumpjumper 15 featured tweaked geometry, more travel, and new shock tech that Specialized has dubbed Genie. In his Specialized Stumpjumper review , Guy Kesteven said the "new version is the most awesome Stumpy ever".

Now Specialized has launched a new M5 alloy version that comes with mechanical groupset compatibility, SWAT door downtube storage, geometry adjustments, and Specialized's new Genie shock technology.

The new Genie shock is claimed to give "16.3 percent better bump force management and 39 percent fewer severe bottom-outs compared to a standard air-sprung shock" – according to Specialized. It uses a two-stage air shock with a large volume chamber offering linear action through the initial shock stroke, before transitioning to a small air chamber to ramp up progression to resist bottom-out forces.

The alloy Stumpjumper 15 shares the same geometry as the carbon bikes and features several geometry adjustments to tweak the ride feel. An eccentric headset cup adjusts the head angle between 63, 64.5, and 65.5 degrees. The bottom bracket height can also be altered from 337mm to 330mm via a flip-chip in the Horst suspension link. There are six frame sizes with S1 and S2 frame sizes with a 27.5in rear, wheel while larger bikes are 29in front and rear. The smaller three frame sizes are equipped with 165mm cranks and the larger three have 170mm cranks. Chainstay lengths are size-specific and vary from the S1's 430mm up to the 445m of the S5 and S6.

Specialized will offer the Stumpjumper 15 Alloy in three builds and as a standalone frameset. The Stumpjumper 15 Comp Alloy and Stumpjumper 15 frameset comes with the Genie shock, the Stumpjumper 15 Fox Coil Alloy, you guessed it, comes with a Fox DHX Factory coil shock, and the base model Stumpjumper 15 Alloy gets a standard air shock from X-Fusion.

The carbon-framed Stumpjumper 15s caused some controversy because the frames don't have routing for a cabled shifter – all the models have wireless versions. However, the alloy Stumpys have the required plumbing whether they come with a conventional shifter or not.

Specialized Stumpjumper 15 pricing

• S-Works Stumpjumper 15: $12,000 / £10,000 / €13,000 / AUD 19,500
• Stumpjumper 15 Pro: $9,000 / £7,500 / €9,500 / AUD 14,500
• Stumpjumper 15 Ohlins Coil: $8,500 / £7,000 / €8,500 / AUD 12,500
• Stumpjumper 15 Expert: $6,500 / £6,000 / €7,500 / AUD 11,200
• Stumpjumper 15 Comp: $5,500 / £5,250 / €6,500 / AUD TBC
• S-Works Stumpjumper 15 frame and shock: $3,500 / £4,000 / €4,500 / AUD 7,500
• Stumpjumper 15 Fox Coil Alloy: $5,500 / £5,000 / €6,200 / AUD 8,500
• Stumpjumper 15 Comp Alloy: $4,500 / £3,750 / €4,500  / AUD 6,200
• Stumpjumper 15 Alloy: $3,000 / £2,750 / €3,250 / AUD 4,900
• S-Works Stumpjumper 15 Alloy frame and shock : $2,300 / £TBC / €2,600 / AUD 3,900

Tech specs: Specialized Stumpjumper 2025

Stumpjumper 15 Fox Coil Alloy

• Frame: M5 Alloy chassis and rear-end, Trail Geometry, SWAT Door integration, head tube angle adjustment, threaded BB, internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, SRAM UDH compatible, 145mm of travel
• Fork: FOX FLOAT 38 Factory, GRIP X2 damper, HS and LS rebound and compression adjustment, 15x110mm QR axle, 44mm offset,160mm of travel
• Shock: FOX DHX Factory, Ride Dynamics Trail Tune, 210x55mm, S2:400lbs, S3: 450lbs, S4: 500bs, S5: 550lbs, S6: 600lbs
• Brakes: TRP DH-R EVO, 4-piston caliper, hydraulic disc,
• Gears: Shimano SLX, M7100, 12spd
• Crankset: Shimano SLX, M7120, 32T ring, 55mm chainline,S2-S3:165mm, S4-S6: 170mm
• Wheels: Roval Traverse, hookless alloy, 30mm inner width, tubeless ready,Front: 29, Rear: 27.5
• Front tire: Butcher, GRID TRAIL casing, GRIPTON T9 compound, 2BlissReady, 29x2.3"
• Rear tire: Eliminator, GRID GRAVITY casing, GRIPTON T9/T7compound, 2Bliss Ready, 27.5x2.3"
• Seatpost: PNW Loam OE Dropper, tool-less travel adjust, Range lever,34.9, S2: 150mm, S3: 170mm, S4-S6: 200mm
• Saddle: Bridge Comp, Hollow Cr-mo rails, S1-S2: 155mm, S3-S6:143mm
• Bars: Deity, Racepoint, 5-degree upsweep, 9-degree backsweep, 810width, S2: 25mm rise; S3-S6: 38mm rise
• Stem: Deity, 35mm clamp, 35mm length
• Weight: 16.90 kg

Stumpjumper 15 Comp Alloy

• Frame: M5 Alloy chassis and rear-end, Trail Geometry, SWAT Door integration, head tube angle adjustment, threaded BB, internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, SRAM UDH compatible, 145mm of travel
• Fork: FOX FLOAT 36 Rhythm, GRIP damper, two position Sweepadjustment, 15x110mm QR axle, 44mm offset, S1:140mm of travel, S2-S6:150mm of travel
• Shock: FOX FLOAT Performance with Specialized GENIE Shock Tech, Ride Dynamics Trail Tune, 2-position lever w/ LSR adjustment, S1:210x52.5mm, S2-S6:210x55mm
• Brakes: TRP Trail EVO, 4-piston caliper, hydraulic disc
• Gears: Shimano SLX, M7100, 12spd
• Crankset: Shimano SLX, M7120, 32T ring, 55mm chainline, S1-S3:165mm,S4-S6: 170mm
• Wheels Specialized, 6000 series alloy, 6-degree upsweep, 8-degree backsweep. S1-S2: 780 width, 20mm rise; S3-S4: 800 width,30mm rise; S5-S6: 800 width, 40mm rise
• Front tire: Butcher, GRID TRAIL casing, GRIPTON T9 compound, 2BlissReady, 29x2.3"
• Rear tire: Eliminator, GRID GRAVITY casing, GRIPTON T9/T7compound, 2Bliss Ready, 27.5x2.3"
• Seatpost: X-Fusion Manic, infinite adjustable, two-bolt head, bottom mount cable routing, remote SLR LE lever, 34.9, S1: 125mm, S2:150mm, S3: 170mm, S4-S6: 190mm
• Saddle: Bridge Comp, Hollow Cr-mo rails, S1-S2: 155mm, S3-S6:143mm
• Bars: Specialized, 6000 series alloy, 6-degree upsweep, 8-degreebacksweep. S1-S2: 780 width, 20mm rise; S3-S4: 800 width,30mm rise; S5-S6: 800 width, 40mm rise
• Stem: Alloy Trail Stem, 35mm bar bore
• Weight: 16.17kg

Stumpjumper 15 Alloy

• Frame: M5 Alloy chassis and rear-end, Trail Geometry, SWAT Door integration, head tube angle adjustment, threaded BB, internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, SRAM UDH compatible, 145mm of travel
• Fork: RockShox, Psylo Silver, Motion Control Damper, 15x110 axle,44mm offset, S1:140mm of travel, S2-S6:150mm of travel
• Shock: X-Fusion 02 Pro RL, Ride Dynamics Trail Tune, rebound adjust, lockout S1:210x52.5mm, S2-S6:210x55mm
• Brakes: Shimano, BR-MT420, 4-piston caliper, hydraulic disc,
• Gears: Shimano Deore, M6100, 12spd
• Crankset: Shimano Deore, M6120, 30T ring, 55mm chainline,S1-S3:165mm, S4-S6: 170mm
• Wheels: Specialized Alloy, Tubeless Ready, 29mm internal width, 28h, Front: 29, Rear: S1-S2: 27.5, S3- S6: 29
• Front tire: Butcher, GRID TRAIL casing, GRIPTON T9 compound, 2BlissReady, 29x2.3"
• Rear tire: Eliminator, GRID GRAVITY casing, GRIPTON T9/T7compound, 2Bliss Ready, 27.5x2.3"
• Seatpost: TranzX Dropper, remote SLR LE lever, 34.9, S1: 125mm, S2:150mm, S3: 170mm, S4-S6: 200mm
• Saddle: Bridge, Steel rails, S1-S2: 155mm, S3-S6: 143mm
• Bars: Specialized, 6000 series alloy, 6-degree upsweep, 8-degreebacksweep. S1-S2: 780 width, 20mm rise; S3-S4: 800 width,30mm rise; S5-S6: 800 width, 40mm rise
• Stem: Alloy Trail Stem, 35mm bar bore
• Weight: 16.57kg