2021 Specialized Stumpjumper Comp Alloy

A 29″ aluminum frame full suspension trail bike with high-end components, priced near the low end of the Stumpjumper model range. Compare the full range

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2021 Specialized Stumpjumper Comp Alloy
MSRP$3,500
Front Travel140mm
Rear Travel130mm
FrameAluminum
ForkFox Rhythm Float 34
Wheels29″
Drivetrain1 × 12
GroupsetNX Eagle
BrakesHydraulic Disc
SeatpostDropper post
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Gearing

1 × 12 — 12 speed

Stumpjumper Comp Alloy

24 mph

Similar Bikes

26 mph

The Stumpjumper Comp Alloy is easier to ride up hills than similar bikes.

The Stumpjumper Comp Alloy won‘t keep up with similar bikes while riding downhill or sprinting.


Estimated Spec Level

Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more. Learn more

Spec level →$0$500$1,000$1,500$2,000$2,500$3,000$3,500
This bike
Other trail bikes

Reviews

February 2021

Beta
Tested: Specialized Stumpjumper Comp Alloy

The ideal balance between value and quality, the Stumpjumper Comp Alloy is a mid-travel 29er thats ready to rock out of the box.

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September 2021

BikeRadar
Specialized Stumpjumper Comp Alloy review

A fantastically capable and fun-to-ride trail bike with a surprisingly reasonable price tag

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January 2021

ENDURO Mountainbike Magazine
2021 Specialized S-Works Stumpjumper EVO review – A perfect do-it-all bike!

Be honest, how demanding are the trails you ride really? If you don't live in Whistler or Finale Ligure and like to go on longer rides, then the Specialized S-Works Stumpjumper EVO is probably the right bike for you.

Read Full Review

October 2020

Bikerumor
2021 Specialized Stumpjumper 29er reshaped as short-travel, fast & aggressive trail bike

Specialized's all-new Stumpjumper is again "the ultimate trail bike", a sweet spot of light weight, short-travel and descending capability!

Read Full Review

October 2020

MBR
Specialized Stumpjumper Expert (2021): first ride review - MBR

With the 2021 Specialized Stumpjumper Expert, the original - and arguably the world's most popular - trail bike gets a hosts of refinements.

Read Full Review

October 2020

Vital MTB
2021 Specialized Stumpjumper S-Works

Massive geometry and size updates along with a new suspension character bring the feature-rich Stumpjumper into the limelight.

Read Full Review

October 2020

Freehub
2021 Specialized Stumpjumper EVO Expert // Bike Review

The storied Specialized Stumpjumper EVO—arguably the most famous mountain bike model in the history of our sport—is back for 2021, and the newest incarnation feels more refined and adjustable than ever before. With a headtube angle that’s adjustable from 65.5 degrees all the way down to 63 degrees, and a bottom bracket with height adjustability from 32 millimeters of drop to a ground-hugging 39 millimeters of drop, the new Stumpjumper EVO Expert we tested comes with multiple geometry options that can radically change its personality on a wide variety of terrain. The 2021 Stumpjumper EVO certainly has retained some of the climbing characteristics of its previous iteration. Specifically, it’s a bike that is far better to climb in the seated position than hammering out of the saddle—a trait attributed to the FSR suspension platform, which gives impressive traction through chunky terrain while climbing in the seated position. While climbing in the seated position, my weight felt balanced between the front and rear wheels, allowing me to stay comfortable and in control on even the steepest of climbs. I found the lowest bottom-bracket setting to be the best for climbing, as it extends the chainstay dimensions, adding to its overall stability. When it came to dialing in the compression on the super-active Fox Float DPX2 Performance Elite shock, I preferred switching it into the middle setting on the climb switch to slightly stiffen the pedaling platform.

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October 2020

Flow Mountain Bike
Specialized Stumpjumper 2021 Review | Goodbye FSR, hello flex stay!

For 2021, Specialized is launching a brand new Stumpjumper. As well as being lighter, the Stumpjumper also sees big changes to its geometry and suspension. How does it ride and how does it compare to the Stumpjumper EVO? We've been testing a 2021 Specialized Stumpjumper Pro to find out - read on for our full review.

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Geometry

Sizing
S1

4'11" – 5'3"

S2

5'2" – 5'8"

S3

5'5" – 5'11"

S4

5'7" – 6'3"

S5

5'10" – 6'4"

S6

6'2" – 6'8"

🐐 Estimated


Specs
Build
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

BB StandardBSA, 73mm, threaded

Fork

FOX FLOAT 34 Rhythm, GRIP damper, two position Sweep adjustment, 15x110mm QR axle, 44mm offset,140mm of travel

Rear Shock

FOX FLOAT DPS Performance, Rx Trail Tune, rebound and 3-position compression adjust, S1:190x42.5mm, S2-S6: 190x45mm

Bottom Bracket

SRAM DUB, BSA 73mm, Threaded

Stem

Alloy Trail Stem, 35mm bar bore

Handlebar

Specialized, 6061 alloy, 6-degree upsweep, 8-degree backsweep, 30mm rise, 800mm width

Saddle

Bridge Comp, Hollow Cr-mo rails, 155/143mm

Seatpost

X-Fusion Manic, infinite adjustable, remote SRL LE lever, 34.9 (S1:100mm, S2: 125mm, S3: 150mm, S4/S5: 170mm, S6: 190mm)

Groupset
Rear Derailleur

SRAM NX Eagle, 12-speed

Crank

SRAM NX Eagle, DUB, S1:165mm, S2-S5: 170mm, S6: 175mm, Steel, 30T

Shifters

SRAM NX Eagle, trigger, 12-speed

Cassette

SRAM NX Eagle, 12-speed, 11-50t

Chain

SRAM NX Eagle, 12-speed

Brakes

SRAM G2 R, 4-piston caliper, hydraulic disc, 200mm

Wheels
Rims

Roval 29, hookless alloy, 30mm inner width, tubeless ready

Spokes

DT Swiss Industry

Front Hub

Alloy, sealed cartridge bearings, 15x110mm thru-axle, 28h

Rear Hub

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

Tires

Butcher, GRID casing, GRIPTON® compound, 29x2.3"

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