Specialized Stumpjumper 15 Alloy Bike 2025 Cast Blue/Dove Grey
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The Stumpjumper 15 Alloy delivers a balanced mix of efficiency, control, and personalization for any trail. Its M5 alloy frame integrates SWAT downtube storage, while the Ride Dynamics-tuned X-Fusion 02 Pro RL shock and RockShox Psylo Silver fork provide refined suspension performance. With a Shimano Deore 12-speed drivetrain and MT-420 4-piston brakes, this bike is built for technical precision and durability.
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
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