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Stumpjumper Comp Alloy 27.5
2020 Stumpjumper Comp Alloy 27.5
The Stumpjumper Comp Alloy 27.5 combines the balanced stiffness and incredible precision of our sidearm frame design with a 12-speed SRAM NX Eagle drivetrain. The end result is a bike that outperforms its price tag by a wide margin.
THE ULTIMATE TRAIL BIKE
The innovative sidearm frame design makes a lighter, better-handling bike. By directly connecting all three mounting points of the rear-end and shock to the frame, we’ve increased both stiffness and performance over bumps.
PERFECTLY-BALANCED SUSPENSION
Our in-house suspension-tuning team develops custom shock tunes, perfectly paired to each bike’s kinematics. We call this Rx Tune and while it’s not the easy way to build a suspension bike, it’s worth it. You feel Rx Tune as perfectly-balanced suspension. Total control.
MASSIVE BANG FOR YOUR BUCK
• Sidearm frame design offers balanced stiffness and precise handling.
• FOX DPS Performance rear shock delivers perfectly-dialed rear suspension.
• NX Eagle 12-speed drivetrain gives you single-ring simplicity and gearing to spare.
Technical Specifications
FRAMESET
FRAME
M5 alloy chassis and rear-end, asymmetrical design, 27.5 Trail Geometry, threaded BB, fully enclosed internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 150mm of travel
SEAT BINDER
Specialized bolt-type, alloy, 38.6mm
SUSPENSION
REAR SHOCK
FOX FLOAT DPS Performance, Rx Trail Tune, rebound and 3-position compression adjust, 210x52.5mm
FORK
FOX FLOAT RHYTHM, 34, GRIP damper, 44mm offset, 2-position sweep adjust, 15x110mm, tapered alloy steerer, 150mm of travel
COCKPIT
STEM
Specialized Trail, 3D-forged alloy, 4-bolt, 6-degree rise
HANDLEBARS
Specialized Trail, 6061 alloy, 8-degree backsweep, 6-degree upsweep, 27mm rise, 31.8mm clamp, XS 720mm, S-XL 750mm,
GRIPS
Specialized Sip grip, half-waffle, S/M: regular thickness, L/XL: XL thickness
SADDLE
Body Geometry Phenom Comp, hollow Cr-Mo rails, 143mm
SEATPOST
X-Fusion Manic, infinite adjustable, two-bolt head, bottom mount cable routing, remote SRL LE lever, 34.9mm, S: 125mm, M/L: 150mm, XL: 170mm
BRAKES
FRONT BRAKE
SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 200mm
REAR BRAKE
SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 180mm
DRIVETRAIN
REAR DERAILLEUR
SRAM NX Eagle, 12-speed
SHIFT LEVERS
SRAM NX Eagle, trigger, 12-speed
CASSETTE
SRAM NX Eagle, 12-speed, 11-50t
CHAIN
SRAM NX Eagle, 12-speed
CRANKSET
SRAM NX Eagle, DUB, 170mm
CHAINRINGS
Steel, 30T
BOTTOM BRACKET
SRAM DUB, BSA 73mm, Threaded
WHEELS
RIMS
Roval Traverse 27.5, hookless alloy, 30mm inner width, tubeless ready
FRONT HUB
Specialized, sealed cartridge bearings, 15x110mm spacing, 28h
REAR HUB
Specialized, sealed cartridge bearings, 12x148mm thru-axle, 32h
SPOKES
DT Swiss Industry
FRONT TIRE
Butcher, GRID casing, GRIPTON® compound, 2Bliss Ready, 27.5 x 2.6"
REAR TIRE
Eliminator, GRID TRAIL casing, GRIPTON® compound, 2Bliss Ready, 27.5 x 2.6"
INNER TUBES
Presta, 40mm valve
* Weights based on production painted frames as pictured. Actual weights will vary based on colorway, frame size, and component variation. Specifications are subject to change without notice.
Geometry
| S | M | L | XL | ||
|---|---|---|---|---|---|
| Crank Length | 170 | 170 | 170 | 170 | |
| Handlebar Width | 780mm | 780mm | 780mm | 780mm | |
| Stem Length | 45 | 45 | 45 | 45 | |
| Saddle Width | 143mm | 143mm | 143mm | 143mm | |
| Seatpost Length | 375 | 438 | 438 | 438 | |
| Stack | 581mm | 592mm | 596mm | 623mm | 637mm |
| Reach | 405mm | 415mm | 435mm | 455mm | 480mm |
| Head Tube Length | 100mm | 105mm | 110mm | 140mm | 155mm |
| Head Tube Angle | 66.5° | 65.5° | 65.5° | 65.5° | 65.5° |
| BB Height | 325mm | 336mm | 336mm | 336mm | 336mm |
| BB Drop | 28mm | 21mm | 21mm | 21mm | 21mm |
| Trail | 103mm | 112mm | 112mm | 112mm | 112mm |
| Fork Length, Full | 522mm | 542mm | 542mm | 542mm | 542mm |
| Fork Rake/Offset | 46mm | 46mm | 46mm | 46mm | 46mm |
| Front Center | 696mm | 726mm | 748mm | 780mm | 812mm |
| Chainstay Length | 432mm | 432mm | 432mm | 432mm | 432mm |
| Wheelbase | 1127mm | 1157mm | 1179mm | 1212mm | 1243mm |
| Top Tube Length, Horizontal | 544mm | 570mm | 595mm | 627mm | 660mm |
| Bike Standover Height | 742mm | 752mm | 757mm | 769mm | 770mm |
| Seat Tube Length | 380mm | 380mm | 410mm | 455mm | 505mm |
| Seat Tube Angle | 76.5° | 75.3° | 75° | 74.6° | 74.2° |
Manual Downloads
Rider Reviews
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