2020 Specialized

Stumpjumper Comp Alloy 27.5

A 27.5″ aluminum frame full suspension enduro bike with high-end components.

MSRP$3,320
FrameAluminum
SuspensionFull, 150 / 150mm
ForkFox Rhythm Float 34
ShockFox Float DPS Performance
Wheels27.5″ Aluminum
Drivetrain1 × 12
GroupsetNX Eagle
BrakesHydraulic Disc
SeatpostDropper
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
Stumpjumper Comp Alloy 27.5
Other Enduro bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

22 mph

Stumpjumper Comp Alloy 27.5

26 mph

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Highest gear

(descending)

Sizing
SM

5'2" – 5'8"

MD

5'6" – 5'11"

LG

5'10" – 6'3"

XL

6'1" – 6'7"

🐐 Estimated

Rider Fit Notes

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Reviews
Pinkbike
Field Test: Specialized Stumpjumper EVO Alloy - The Golden Retriever of Bicycles

Dec 2021 · Alicia Leggett

It's worth mentioning that the Stumpy EVO Alloy was the longest-travel bike we tested in the batch of 130mm to 150mm trail bikes this Field Test, so it's a bit more bike than anything else we're reviewing this week.

Highs
  • So, so adaptable - and the geo adjustments are easier than on some other bikes

  • SWAT box is the biggest and the best of the in-frame storage boxes out there

  • Good value and smart spec

  • Good crossover trail-enduro option

Lows
  • There's no true top-end build, and it would be so good to see more aluminum bikes with fancy spec options

  • A tad heavy if we're counting grams

  • Star ratchet issue with the rear hub prior to Field Test

Read Review

MTB Mag
[First Ride] Specialized Stumpjumper EVO Alloy

Oct 2021 · Ian Collins

The best part about the Stumpjumper EVO Alloy is how nicely Specialized implemented all of the best parts of the more expensive carbon frame

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BikeRadar
Specialized Stumpjumper Comp Alloy review

Sep 2021 · Alex Evans

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

Highs
  • Excellent on the downhills, thanks to great geometry and suspension

  • Refined, premium-feeling package without the associated price tag

  • Near-silent operation

  • Comfortable saddle and grips

Lows
  • Fox 34 Rhythm fork holds it back on steeper trails

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Revolution Mountain Bike Magazine
[R]eviewed // Specialized Stumpjumper Evo Expert

Mar 2021 · Blake Nielsen

‘Total control, unparalleled bump-eating suspension, and a fine-tunable geometry are hallmarks of the all-new Stumpjumper EVO Expert. ‘ Lofty words from Specialized to say the least! Long time [R] tester Blake Nielsen got his hands dirty onboard their new Swiss Army knife of bikes on everything he could, from home trails to Thredbo. Read on! Reviewer // Blake Nielsen   Photos // Matt Staggs Let’s start nice and easy with your first impression of the Evo once it arrived at [R]evo’s […]

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Beta
Tested: Specialized Stumpjumper Comp Alloy

Feb 2021 · Travis Engel

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

Highs
  • Smart spec

  • Perfect geometry for the category

  • 6 sizes, including XS and XXL

Lows
  • Just barely outside the "budget" category

  • Rattly dropper cable

Read Review

Freehub
Bike Review | 2021 Specialized Stumpjumper Expert

Nov 2020 · Spencer Johnson

The moment that Specialized revamped its venerated Stumpjumper for 2021, I was chomping at the bit to see what the redesigned trail bike was all about. My first introduction was to the Stumpjumper EVO Expert, a rowdy all-rounder that I absolutely loved. So, when I got a chance to test its sibling, the Stumpjumper Expert, I was eager to find out how it stacked up against the EVO. I had a hard time concealing my curiosity when I noticed that the Stumpjumper Expert was missing Specialized’s signature FSR suspension design. To save weight, the bike’s designers opted for a lightweight flex stay rather than the traditional chainstay pivot point. I was so keen to try it out that I immediately took it on a few small hot laps on the “test track” outside my apartment, which is, no joke, a stump I love to jump. I immediately knew the Stumpjumper Expert was ready for some of Galbraith Mountain’s rowdiest trails. Most of my favorite rides involve an hour or more of climbing before a quick, high-speed descent. So, as one could expect, I have a soft spot for bikes that climb exceptionally well. The new Stumpjumper Expert made my time climbing a joy. The kinematics of the 130-millimeter rear shock helped to keep the momentum moving forward, regardless of whether I was pedaling in or out of the saddle. I never felt the need to reach down and flip into “climb” mode on the Fox Float DPS Performance Elite shock while climbing. The suspension showed an excellent mix of traction-generating squish, while also delivering some zippy acceleration—something that was accentuated by the Specialized Purgatory rear tire. The seat angle was just steep enough to keep the bike balanced on steep, punchy climbs, even while seated.

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NSMB
2021 Specialized Stumpjumper

Oct 2020

The latest Stumpjumper is less an overhaul and more an evolution but t's still been subject to many updates including a step away from the Horst Link suspension design we're used to seeing on the Stumpjumper model.

Read Review

VeloNews
Specialized Stumpjumper — the lightest ever — rips the trails again

Oct 2020 · VeloNews.com

Specialized completely overhauls one of the most venerable mountain bike models, with alloy or carbon models to flatten trails and singletrack.

Read Review

Geometry
99 Spokes on YouTube99 Spokes on YouTube
Specs
Build
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

BB StandardBSA, 73mm, Threaded

Fork

FOX FLOAT RHYTHM, 34, GRIP damper, 44mm offset, 2-position sweep adjust, 15x110mm, tapered alloy steerer, 150mm of travel

Travel150mm

Spring TypeAir

Shock

FOX FLOAT DPS Performance, Rx Trail Tune, rebound and 3-position compression adjust, 210x52.5mm

Travel150mm

Spring TypeAir

Bottom Bracket

SRAM DUB, BSA 73mm, Threaded

Stem

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

Handlebar

Specialized Trail, 6061 alloy, 8-degree backsweep, 6-degree upsweep, 27mm rise, 31.8mm clamp, XS 720mm, S-XL 750mm,

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

TypeDropper

Grips

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

Groupset
Rear Derailleur

SRAM NX Eagle, 12-speed

Crank

SRAM NX Eagle, DUB, 170mm, Steel, 30T

Shifters

SRAM NX Eagle, trigger, 12-speed

Cassette

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

Chain

SRAM NX Eagle, 12-speed

Brakes

Front: SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 200mm, Rear: SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 180mm

TypeHydraulic Disc

Wheels
Rims

Roval Traverse 27.5, hookless alloy, 30mm inner width, tubeless ready

Spokes

DT Swiss Industry

Front Hub

Specialized, sealed cartridge bearings, 15x110mm spacing, 28h

Rear Hub

Specialized, sealed cartridge bearings, 12x148mm thru-axle, 32h

Tires

Front: Butcher, GRID casing, GRIPTON® compound, 2Bliss Ready, 27.5 x 2.6", Rear: Eliminator, GRID TRAIL casing, GRIPTON® compound, 2Bliss Ready, 27.5 x 2.6"

Rider Notes
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Last updated October 9
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