






2025 Stumpjumper 15 Alloy
Technical Specifications
Frameset
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
Seat Binder
Alloy, 38.6mm
SWAT
SWAT internal downtube storage
Suspension
Rear Shock
X-Fusion 02 Pro RL, Ride Dynamics Trail Tune, rebound adjust, lockout S1:210x52.5mm, S2-S6:210x55mm
Fork
RockShox, Psylo Silver, Motion Control Damper, 15x110 axle, 44mm offset, S1:140mm of travel, S2-S6:150mm of travel
Brakes
Front Brake
Shimano, BR-MT420, 4-piston caliper, hydraulic disc, 203mm
Rear Brake
Shimano, BR-MT420, 4-piston caliper, hydraulic disc, S1-S2: 180mm, S3-S6: 203mm
Drivetrain
Shift Levers
Shimano Deore, M6100, 12spd
Rear Derailleur
Shimano Deore, M6100, 12pd, Shadow Plus
Cassette
Shimano Deore, M6100, 12spd w/Hyperglide+, 10-51t
Chain
Shimano Deore, M6100, 12-speed
Crankset
Shimano Deore, M6120, 30T ring, 55mm chainline, S1-S3:165mm, S4-S6: 170mm
Wheels & Tires
Rims
Specialized Alloy, Tubeless Ready, 29mm internal width, 28h, Front: 29, Rear: S1-S2: 27.5, S3- S6: 29
Front Hub
Alloy, sealed cartridge bearings, 15x110mm thru-axle, 28h
Rear Hub
Alloy, sealed cartridge bearings, 12x148mm thru-axle, 28h
Spokes
Stainless, 14g
Front Tire
Butcher, GRID TRAIL casing, GRIPTON T9 compound, 2Bliss Ready, 29x2.3"
Rear Tire
Eliminator, GRID TRAIL casing, GRIPTON T7 compound, 2Bliss Ready, S1-S2: 27.5x2.3, S3- S6: 29x2.3"
Inner Tubes
Standard, Presta valve
Cockpit
Stem
Alloy Trail Stem, 35mm bar bore
Handlebars
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
Grips
Specialized Trail Grips
Saddle
Bridge, Steel rails, S1-S2: 155mm, S3-S6: 143mm
SeatPost
TranzX Dropper, remote SLR LE lever, 34.9, S1: 125mm, S2: 150mm, S3: 170mm, S4-S6: 200mm
Product Details
Product ID
276239
Weight
Weight
16.57 kg (36 lb, 8.5 oz)
Weight Size
S4
Technical Specifications
Frameset
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
Seat Binder
Alloy, 38.6mm
SWAT
SWAT internal downtube storage
Suspension
Rear Shock
X-Fusion 02 Pro RL, Ride Dynamics Trail Tune, rebound adjust, lockout S1:210x52.5mm, S2-S6:210x55mm
Fork
RockShox, Psylo Silver, Motion Control Damper, 15x110 axle, 44mm offset, S1:140mm of travel, S2-S6:150mm of travel
Brakes
Front Brake
Shimano, BR-MT420, 4-piston caliper, hydraulic disc, 203mm
Rear Brake
Shimano, BR-MT420, 4-piston caliper, hydraulic disc, S1-S2: 180mm, S3-S6: 203mm
Drivetrain
Shift Levers
Shimano Deore, M6100, 12spd
Rear Derailleur
Shimano Deore, M6100, 12pd, Shadow Plus
Cassette
Shimano Deore, M6100, 12spd w/Hyperglide+, 10-51t
Chain
Shimano Deore, M6100, 12-speed
Crankset
Shimano Deore, M6120, 30T ring, 55mm chainline, S1-S3:165mm, S4-S6: 170mm
Wheels & Tires
Rims
Specialized Alloy, Tubeless Ready, 29mm internal width, 28h, Front: 29, Rear: S1-S2: 27.5, S3- S6: 29
Front Hub
Alloy, sealed cartridge bearings, 15x110mm thru-axle, 28h
Rear Hub
Alloy, sealed cartridge bearings, 12x148mm thru-axle, 28h
Spokes
Stainless, 14g
Front Tire
Butcher, GRID TRAIL casing, GRIPTON T9 compound, 2Bliss Ready, 29x2.3"
Rear Tire
Eliminator, GRID TRAIL casing, GRIPTON T7 compound, 2Bliss Ready, S1-S2: 27.5x2.3, S3- S6: 29x2.3"
Inner Tubes
Standard, Presta valve
Cockpit
Stem
Alloy Trail Stem, 35mm bar bore
Handlebars
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
Grips
Specialized Trail Grips
Saddle
Bridge, Steel rails, S1-S2: 155mm, S3-S6: 143mm
SeatPost
TranzX Dropper, remote SLR LE lever, 34.9, S1: 125mm, S2: 150mm, S3: 170mm, S4-S6: 200mm
Product Details
Product ID
276239
Weight
Weight
16.57 kg (36 lb, 8.5 oz)
Weight Size
S4