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Stumpjumper ST Comp Alloy 29
2020 Stumpjumper ST Comp Alloy 29
Die-hard aluminum fans rejoice. Our snappy and nimble Stumpjumper ST is available in M5 alloy. It’s perfect for riders seeking a quick and capable all-rounder. The Stumpjumper ST Comp Alloy 29 ups the ante with full Fox suspension and reliable Shimano drivetrain.
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. End result? Total control.
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.
A NO-NONSENSE BUILD
• Sidearm frame design offers balanced stiffness and precise handling.
• The FOX DPS Performance rear shock equals perfectly dialed rear-suspension.
• FOX FLOAT Rhythm 34 fork with 130mm of travel offers great adjustabiity.
Technical Specifications
FRAMESET
FRAME
M5 alloy chassis and rear end, asymmetrical design, 29 Trail Geometry, threaded BB, fully enclosed internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 120mm 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, 190x42.5MM
FORK
FOX FLOAT RHYTHM, 34, GRIP damper, 51mm offset, 2-position sweep adjust, 15x110mm, tapered alloy steerer, 130mm 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
Shimano MT-501, hydraulic disc, resin pad
REAR BRAKE
Shimano MT-501, hydraulic disc, resin pad
DRIVETRAIN
REAR DERAILLEUR
Shimano SLX, Shadow Plus, 11-speed
SHIFT LEVERS
Shimano SLX, 11-speed
CASSETTE
Shimano SLX, 11-speed, 11-46t
CHAIN
KMC X11, 11-speed w/ Missing Link™
CRANKSET
Race Face Ride, 170mm
CHAINRINGS
Steel, 30T
BOTTOM BRACKET
Threaded BB, 24mm spindle
WHEELS
RIMS
Double-wall alloy, 27mm internal width
FRONT HUB
Specialized, sealed cartridge bearings, 15x110mm thru-axle, 32h
REAR HUB
Specialized, sealed cartridge bearings, 12x148mm thru-axle, 32h
SPOKES
Stainless, 14g
FRONT TIRE
Eliminator, GRID TRAIL casing, GRIPTON® compound, 2Bliss Ready, 29x2.3"
REAR TIRE
Purgatory, GRID Casing, GRIPTON® compound, 29x2.3"
INNER TUBES
Standard, Presta 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 | 478 |
| Stack | 612mm | 612mm | 635mm | |
| Reach | 415mm | 435mm | 455mm | |
| Head Tube Length | 100mm | 100mm | 125mm | |
| Head Tube Angle | 67.5° | 67.5° | 67.5° | |
| BB Height | 333mm | 333mm | 333mm | |
| BB Drop | 39mm | 39mm | 39mm | |
| Trail | 99mm | 99mm | 99mm | |
| Fork Length, Full | 540mm | 540mm | 540mm | |
| Fork Rake/Offset | 51mm | 51mm | 51mm | |
| Front Center | 708mm | 728mm | 758mm | |
| Chainstay Length | 437mm | 437mm | 437mm | |
| Wheelbase | 1143mm | 1163mm | 1192mm | |
| Top Tube Length, Horizontal | 570mm | 593mm | 624mm | |
| Bike Standover Height | 750mm | 756mm | 769mm | |
| Seat Tube Length | 380mm | 410mm | 455mm | |
| Seat Tube Angle | 75.8° | 75.5° | 75.1° |
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