Specialized Stumpjumper Alloy Features
The Stumpjumper Alloy brings all-new suspension kinematics and progressive geometry into a full-alloy package that's both lightweight and extremely durable. Outfitted with a no-fuss SRAM SX 12-speed groupset, the Stumpjumper Alloy is your all-access pass for trail adventure.
At a Glance
- THE TRAIL BENCHMARK — When we set out to design the all-new Stumpjumper, we pursued some hefty goals. It had to excel on any kind of trail, for every style of rider. To achieve that, we went after serious weight reduction without sacrificing durability, a stiff, responsive chassis that still rides light and lively, geometry that improves everyone’s riding, and the best suspension kinematics we know how to design. Turns out, you can have your cake and eat it too with the new Stumpjumper.
- THE SWEETEST 130MM OF TRAVEL YOU’LL EVER RIDE — We massaged the kinematics of the Stumpjumper suspension to bring out the very best all-round performance possible in a 130mm package. Countless hours of suspension lab development and field testing created a refined mid-travel ripper that eats big terrain like a gravity fed beast, handles like a dream everywhere, and climbs like it has a motor.
- PROGRESSIVE GEOMETRY — The S-Sizing geometry of the new Stumpjumper hits the progressive sweet spot. It’s long, low and slack, with a short offset fork and a steeper seat tube angle. These numbers combine to make your ride more stable, more carvealicious, more comfortable climbing, more better everywhere. With FlipChip adjustability you’re able to further fine-tune your fit, ensuring that your new Stumpjumper performs flawlessly on whatever terrain you choose.
- RIDER-FIRST ENGINEERED™ — Rider-First Engineered™ frames use a size-specific approach to ride characteristics that ensures benchmark handling and flawless performance, regardless of frame or rider size. Whether you’re a jump-happy grom riding an S1, or a DH-fiend giant in need of the lengthy S6, you’ll experience the same ride traits – rail-sharp cornering and balanced front and rear stiffness – at the lightest-possible weight, And by light, we mean real light: 2,250 grams (S-Works, S-3 size, with rear shock).
Component Specifications
| Frame | Alloy chassis and rear-end, asymmetrical design, 29 Trail Geometry, horst pivot BB adjustment, threaded BB, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 130mm of travel |
| Seat Binder | Alloy, 38.6 |
| Fork | RockShox 35 Silver, Solo Air, 44mm offset, rebound adjust, TurnKey lockout, 15x110mm Boost™ Maxle® Lite thru-axle, 140mm of travel |
| Rear Shock | X-Fusion 02 Pro RL, Rx Trail Tune, rebound adjust, lockout S1:190x42.5mm, S2-S6: 190x45mm |
| Shift Levers | SRAM SX Eagle, trigger, 12-speed |
| Rear Derailleur | SRAM SX Eagle, 12-speed |
| Cassette | SRAM PG-1210 Eagle, 11-50t |
| Chain | SRAM SX Eagle, 12-speed |
| Crankset | SRAM SX Eagle, S1:165mm, S2-S5: 170mm, S6: 175mm |
| Chain Rings | 30T |
| Bottom Bracket | SRAM Powerspline |
| Rims | Roval 29, hookless alloy, 30mm inner width, tubeless ready |
| Front Hub | Specialized alloy front hub disc, sealed cardridge bearings, 6-bolt, 15x110mm thru-axle, 32h |
| Rear Hub | Alloy, sealed cartridge bearings, 12x148mm thru-axle, 32h |
| Spokes | Stainless, 14g |
| Front Tire | Butcher, GRID casing, GRIPTON® compound, 29x2.3" |
| Rear Tire | Purgatory, GRID Casing, GRIPTON® compound, 29x2.3" |
| Inner Tubes | Standard, Presta valve |
| Front Brake | Tektro Gemini Comp, hydraulic disc, resin pad, 200mm |
| Rear Brake | Tektro Gemini Comp, hydraulic disc, resin pad, 180mm |
| Stem | Alloy Trail Stem, 35mm bar bore |
| Handlebars | Specialized, 6061 alloy, 6-degree upsweep, 8-degree backsweep, 30mm rise, 780mm width |
| Grips | Specialized Trail Grips |
| Saddle | Body Geometry Bridge Saddle, steel rails |
| Seatpost | TranzX dropper, 34.9mm, S1: 100mm, S2: 125mm, S3: 150mm. S4-S5: 170mm, S6- 200mm |
Specialized Stumpjumper Alloy
| Bike/Frame Size | S1 | S2 | S3 | S4 | S5 | S6 |
|---|---|---|---|---|---|---|
| Stack (BB Basso) | 618 mm | 613 mm | 623 mm | 631 mm | 639 mm | 649 mm |
| Stack (BB Alto) | 614 mm | 609 mm | 618 mm | 627 mm | 640 mm | 644 mm |
| BB Drop (BB Alto) | 40 mm | 35 mm | 35 mm | 35 mm | 35 mm | 35 mm |
| Trail (BB Basso) | 126 mm | 126 mm | 126 mm | 126 mm | 126 mm | 126 mm |
| Trail (BB Alto) | 122 mm | 122 mm | 122 mm | 122 mm | 122 mm | 122 mm |
| Lunghezza Forcella | 550 mm | 550 mm | 550 mm | 550 mm | 550 mm | 550 mm |
| Offset Forcella/Rake | 44 mm | 44 mm | 44 mm | 44 mm | 44 mm | 44 mm |
| Avancorsa | 726 mm | 746 mm | 770 mm | 799 mm | 828 mm | 863 mm |
| Lunghezza Batticatena (BB Basso) | 444 mm | 444 mm | 444 mm | 444 mm | 454 mm | 454 mm |
| Lunghezza Batticatena (BB Alto) | 440 mm | 440 mm | 440 mm | 440 mm | 450 mm | 450 mm |
| Interasse (BB Basso) | 1168 mm | 1188 mm | 1212 mm | 1241 mm | 1280 mm | 1315 mm |
| Interasse (BB Alto) | 1164 mm | 1184 mm | 1208 mm | 1237 mm | 1276 mm | 1311 mm |
| Reach (BB Basso) | 410 mm | 430 mm | 450 mm | 475 mm | 500 mm | 530 mm |
| Lunghezza Tubo orizz. virtuale | 545 mm | 563 mm | 586 mm | 615 mm | 643 mm | 676 mm |
| Altezza Standover | 742 mm | 742 mm | 750 mm | 753 mm | 777 mm | 784 mm |
| Lunghezza Piantone | 385 mm | 385 mm | 405 mm | 425 mm | 445 mm | 465 mm |
| Angolo Sella (BB Basso) | 77.7° | 77.7° | 77.5° | 77.2° | 77° | 76.9° |
| Angolo Sella (BB Alto) | 78.2° | 78.2° | 77.9° | 77.7° | 77.5° | 77.3° |
| Max Inserimento Reggisella | 190 mm | 190 mm | 210 mm | 230 mm | 250 mm | 270 mm |
| Min Inserimento Reggisella | 100 mm | 100 mm | 100 mm | 100 mm | 100 mm | 100 mm |
| Reach (BB Alto) | 416 mm | 435 mm | 455 mm | 480 mm | 505 mm | 535 mm |
| Lunghezza Tubo Sterzo | 100 mm | 100 mm | 110 mm | 120 mm | 130 mm | 140 mm |
| Angolo Sterzo (BB Basso) | 65° | 65° | 65° | 65° | 65° | 65° |
| Angolo Sterzo (BB Alto) | 65.5° | 65.5° | 65.5° | 65.5° | 65.5° | 65.5° |
| Altezza BB (BB Basso) | 327 mm | 332 mm | 332 mm | 332 mm | 332 mm | 332 mm |
| Altezza BB (BB Alto) | 334 mm | 339 mm | 339 mm | 339 mm | 339 mm | 339 mm |
| BB Drop (BB Basso) | 47 mm | 42 mm | 42 mm | 42 mm | 42 mm | 42 mm |
Size Guide: Specialized Stumpjumper Alloy
