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Stumpjumper Comp Alloy 29/6Fattie

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2018 Stumpjumper Comp Alloy 29/6Fattie

Don't get us wrong—carbon is awesome. But when it comes to maintaining peace of mind while you're getting rowdy, nothing compares to the confidence of our alloy Stumpjumper Comp 29/6Fattie. It's light, rugged, and packed with all the spec and travel you need to run it wide open out on the trail.

It features an M5 alloy construction that's lightweight, durable, and plenty stiff and compliant, while SRAM's most durable one-by components have been hand-selected to ensure that you get the most performance over rugged terrain possible. To make things even better, the Stumpy's design also allows you the opportunity to toggle between 29-inch wheels and 6Fattie wheels (not included), allowing the ultimate in configuration options for the trail at hand.

And when you factor in our proprietary Rx Trail Tune at the shock, plus an aggressive, trail-eating geometry that features absurdly short chainstays, a roomy top tube, a low bottom bracket, and a slacked out front end, you get a trail bike that you can be confident in, season after season.

Technical Specifications

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FRAMESET

FRAME

Specialized M5 Aluminum, 29/6Fattie Trail Geometry, PF30 BB, internal cable routing, ManFu link, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 135mm of travel

SEAT BINDER

Alloy, 34.9mm

SUSPENSION

REAR SHOCK

RockShox Monarch RT, Rx Trail Tune, AUTOSAG, rebound and 2-position compression adjust, 197x48mm

FORK

RockShox Reba RL, tapered alloy steerer, 51mm offset, external rebound adjust, low speed comp to lockout, 15mm Maxle® Lite thru-axle, custom 15x110 Boost™, 150mm of travel

WHEELS

RIMS

Roval Traverse 29, hookless alloy, 29mm internal width, tubeless-ready, 24/28h

FRONT HUB

Specialized, sealed cartridge bearings, 15x110mm spacing, 24h

REAR HUB

Specialized, sealed cartridge bearings, 12x148mm thru-axle, 28h

SPOKES

DT Swiss Industry, stainless, 3-cross, 2.0"

FRONT TIRE

Butcher, GRID casing, Gripton compound, 2Bliss Ready, 29 x 2.3"

REAR TIRE

Purgatory, GRID casing, Gripton compound, 2Bliss Ready, 29 x 2.3"

INNER TUBES

Standard, Presta valve

DRIVETRAIN

REAR DERAILLEUR

SRAM GX, long cage, 11-speed

SHIFT LEVERS

SRAM GX, trigger, 11-speed

CASSETTE

SRAM XG 1150, 11-speed, 10-42t

CHAIN

KMC X11, 11-speed w/ Missing Link™

CRANKSET

Race Face Aeffect, PF30

CHAINRINGS

Steel, 28T

BOTTOM BRACKET

Race Face PF30

COCKPIT

STEM

Specialized Trail, 3D forged alloy, 4-bolt, 6-degree rise

HANDLEBARS

Specialized, 6061 alloy, 6-degree upsweep, 8-degree backsweep, 27mm rise, 780mm width

GRIPS

Specialized Sip Grip, half-waffle, S/M: regular thickness, L/XL: XL thickness

SADDLE

Body Geometry Henge Comp, hollow Cr-Mo rails, 143mm

SEATPOST

Command Post IRcc, 12-position micro-height adjustable, alien head design, bottom mount cable routing, remote SRL lever, 30.9mm, S: 100mm, M/L/XL: 125mm of travel

BRAKES

FRONT BRAKE

SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 200/180mm rotor

REAR BRAKE

SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 180/160mm rotor

ACCESSORIES

PEDALS

Specialized Platform, Cr-Mo, 9/16" spindle

* 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

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SMLXLXXL
Crank Length170MM170MM170MM170MM170MM
Handlebar Width780mm780mm780mm780mm780mm
Stem Length45MM60MM60MM60MM60MM
Saddle Width143mm143mm143mm143mm143mm
Seatpost Length390mm430mm430mm430mm430mm
BB Height, 29x2.3"338mm338mm338mm338mm338mm
Stack617mm617mm645mm663mm686mm
Reach389mm417mm435mm461mm477mm
Head Tube Length125mm145mm170mm95mm95mm
Head Tube Angle67.5°67.5°67.5°67.5°67.5°
BB Drop36mm36mm36mm36mm36mm
Trail104mm104mm104mm104mm104mm
Fork Length, Full551mm551mm551mm551mm551mm
Fork Rake/Offset46mm46mm46mm46mm46mm
Front Center680mm708mm738mm771mm797mm
Chainstay Length437mm437mm437mm437mm437mm
Wheelbase1115mm1143mm1172mm1206mm1232mm
Top Tube Length, Horizontal551mm582mm611mm647mm674mm
Bike Standover Height750mm757mm766mm776mm778mm
Seat Tube Length396mm430mm468mm523mm564mm
Seat Tube Angle74°74°75°75°75°
Geometry

Rider Reviews

  • 4.8
  • 4 Reviews

Love this bike!

Ride over a lot of rocks and roots back east. It mows over anything in its path, and could climb a wall. Bottoms out on turns while peddling, because of low bottom bracket, but I've learned what I can get away with.


Name:
Austin R.

Helpful?

I love this bike, great bang for the buck

Really solid build for the price. Love the SRAM GX 11-speed setup, super smooth shifting and riding - love this groupset, best I've ever ridden for the performance/price combo. I assume the pricepoint on this bike is so good because SRAM recently upgraded this GX 11-speed to the GX Eagle 12-speed, so it's technically a bit outdated. But the few hundred $ savings is definitely worth it because it's still such a great setup. My only minor issue with this bike is that the geometry feels just a little bit small for a size large, but that's likely more of an issue with my own body's own geometry than the bike!


Name:
Jd

Helpful?

Amazing bike

The 27.5+, 3.0 inch tires work as advertised. The traction is great and helps on climbs. A lot more nimble that what i expected it to be. Love the simplicity of the 1 x 11 drive train. This has become my primary bike to ride. Only problem was that one of the Guide R brake levers failed; but, that was replaced under warranty by the bike shop with no issues.


Name:
Neil

Helpful?