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Stumpjumper Comp Alloy

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Stumpjumper Comp Alloy

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Metal fans rejoice! The Stumpjumper Comp Alloy rocks on, with one of the most advanced alloy frames ever developed. From the frame’s asymmetrical design, taking in the refined suspension kinematics and all-new geometry, to a build kit that strikes the optimal combination of performance and value, it’s metal, but it ain’t heavy metal. And it’s ready to slay some dirt.

Technical Specifications

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Frameset

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

Seat Binder

Alloy, 38.6mm

Suspension

Rear Shock

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

Fork

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

Cockpit

SeatPost

X-Fusion Manic, infinite adjustable, two-bolt head, bottom mount cable routing, remote SLR LE lever, 34.9, S1: 100mm, S2: 125mm, S3: 150mm, S4/S5: 170mm, S6: 190mm

Stem

Alloy Trail Stem, 35mm bar bore

Handlebars

Specialized, 6061 alloy, 6-degree upsweep, 8-degree backsweep, 30mm rise, 780mm width

Grips

Specialized Trail Grips

Saddle

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

Brakes

Front Brake

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

Rear Brake

SRAM G2 R, 4-piston caliper, hydraulic disc, 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, S1:165mm, S2-S5: 170mm, S6: 175mm

Chainrings

Steel, 30T

Bottom Bracket

SRAM DUB, BSA 73mm, Threaded

Wheels & Tires

Rims

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

Front Hub

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

Rear Hub

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

Spokes

DT Swiss Industry

Front Tire

Butcher, GRID casing, GRIPTON® T9 compound, 2Bliss Ready, 29x2.3"

Rear Tire

Purgatory, GRID casing, GRIPTON® T7 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

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S1S2S3S4S5S6
Crank Length165mm170mm170mm170mm170mm175mm
Handlebar Width780mm780mm780mm780mm780mm780mm
Stem Length40mm40mm50mm50mm50mm50mm
Saddle Width155mm155mm143mm143mm143mm143mm
Seatpost Length100mm125mm150mm170mm170mm190mm
Stack (Low BB)618mm613mm623mm631mm639mm649mm
Stack (High BB)614mm609mm618mm627mm640mm644mm
Reach (Low BB)410mm430mm450mm475mm500mm530mm
Reach (High BB)416mm435mm455mm480mm505mm535mm
Headtube Length100mm100mm110mm120mm130mm140mm
Headtube Angle (Low BB)65°65°65°65°65°65°
Headtube Angle (High BB)65.5°65.5°65.5°65.5°65.5°65.5°
BB Height (Low BB)327mm332mm332mm332mm332mm332mm
BB Height (High BB)334mm339mm339mm339mm339mm339mm
BB Drop (Low BB)47mm42mm42mm42mm42mm42mm
BB Drop (High BB)40mm35mm35mm35mm35mm35mm
Trail (Low BB)126mm126mm126mm126mm126mm126mm
Trail (High BB)122mm122mm122mm122mm122mm122mm
Fork Length (full)550mm550mm550mm550mm550mm550mm
Fork Rake/Offset44mm44mm44mm44mm44mm44mm
Front Center726mm746mm770mm799mm828mm863mm
Chainstay Length (Low BB)444mm444mm444mm444mm454mm454mm
Chainstay Length (High BB)440mm440mm440mm440mm450mm450mm
Wheelbase (Low BB)1168mm1188mm1212mm1241mm1280mm1315mm
Wheelbase (High BB)1164mm1184mm1208mm1237mm1276mm1311mm
Top-tube Length (horizontal)545mm563mm586mm615mm643mm676mm
Bike Standover Height742mm742mm750mm753mm777mm784mm
Seat Tube Length385mm385mm405mm425mm445mm465mm
Seat Tube Angle (Low BB)77.7°77.7°77.5°77.2°77°76.9°
Seat Tube Angle (High BB)78.2°78.2°77.9°77.7°77.5°77.3°
Max Seatpost Insertion190mm190mm210mm230mm250mm270mm
Min Seatpost Insertion100mm100mm100mm100mm100mm100mm
Geometry

Rider Reviews

  • 4.8
  • 29 Reviews
 

Awesome

Love my bike. Amazing.

Would Recommend?
No

Verified Buyer

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Name:
Kevin K.

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Great bike. Rides well, easy

Great bike. Rides well, easy handling, sturdy. Well made bike!

Would Recommend?
No

Verified Buyer

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Name:
Kimble S.

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AWESOME

W bike, I used to absolutley shred black hill and is the best bike ive ever had

Would Recommend?
No

Name:
Jacob

Helpful?

I can't break it

The SJ is an incredibly versatile, adjustable and sturdy bike that's really opened up playing on the trail for me. That's as opposed to laying down as much speed as possible and aiming to merely survive the downhill, rooty pinball sections. My favorite use case is a long day of old school hardwoods singletrack. An absolute Cadillac on days like that. That said, firming everything up to hammer on more low key stuff is as easy as flicking switches on the fork and shock. The biggest adjustment has been how the bike rides kind of centered/weighted on the front wheel compared to the riding the rear wheel vibe of bikes I'm used to with slacker seat angles. This is in the High BB setting.

Would Recommend?
No

Name:
Grant

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Great except hubs

Bought last year, and bike is awesome. I did purchase in offseason a bunch of XX1 and XO1 upgrades however did not realize the rear hub is Shimano HG driver so not compatible with XO1 cassette without rebuilding wheel. Not really happy the tech specs listed on this page leaves out that on the hub descriptions. Otherwise bike is great, well balanced, climbs solid, and floats; I’ll just rebuild wheels after this season so I can take full advantage of other upgrades. Weight wise I’m not missing carbon frame, it’s not terribly noticeable unless you’re doing a lot of climbing.

Would Recommend?
No

Name:
Will

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dual suspension bike

this is my 5th dual suspension and it's the best i've ever had

Would Recommend?
No

Name:
mia

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Love this bike!!

Love this bike!!

Would Recommend?
No

Verified Buyer

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Name:
Guest G.

Helpful?

Great Bike for the price point

This is my first full suspension and it's been fantastic for the price. I've done about 70% single track / technical trails in Virginia and taken it on the downhill trails at Bryce resort a handful of times and it handles it with no problem. I am 6'1, 220lbs and it's a beast for anything I've thrown at it. I did have to replace and upgrade the rear derailleur and rotor after they got mangled together and unsure how. This is the S4 size. Upgrading the handlebars and stem as first upgrade as the handle bars bent in an OTB crash recently.

Would Recommend?
No

Name:
Luke

Helpful?

Stumpy Love... and Maintenance

This bike is a work horse. Loves fast descents and hard climbs. Beautiful geometry and structurally sound. That being said pivot bearings dried out quickly and bottom bracket bearings (SRAM DUB, BSA 73mm, threaded) gave out halfway through second season. The bike was creaking more than my 92-year-old-arthritic-grandfather! Big oversight on Specialized's part, when I discovered a missing washer between the rear shock connection and linkage arm. Specialized's awesome warranty covered this however. Love this bike.

Would Recommend?
No

Name:
Quentin

Helpful?

The perfect "not-beginner" bike

I started out on a hardtail rockhopper pro evo from 2016, great bike but wanted to try full sus. Jumped on a direct-to-consumer brand bike that was very entry level - Rockshox recon, base shimano 12-speed 1x drivetrain, and a basic dropper post. It was okay, but I wanted something that I could really grow into, get great performance out of, had a real manufacturers warranty with brick & mortar locations, and most of all was better spec'd. The comp alloy was the best of both worlds, not as expensive as carbon bikes, but still has a surprisingly light alloy frame with what I consider to be a great fork. Wish it had GX at this price range, but other than that I love the bike. Maxxis tires and you're gtg.

Would Recommend?
No

Name:
John

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Having a new blast with

Having a new blast with my new bike!

Would Recommend?
No

Verified Buyer

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Name:
Guest G.

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Everything I was looking for.

Everything I was looking for.


Verified Buyer

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Name:
Derrin L.

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Nice bike. Rides great!

Nice bike. Rides great!

Would Recommend?
No

Verified Buyer

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Name:
Guest G.

Helpful?

Absolutely love this bike!!! I've

Absolutely love this bike!!! I've tried many different bikes to find the right one, and the stumpjumper had everything I wanted. Light weight bike that doesn't have the carbon price tag.

Would Recommend?
No

Verified Buyer

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Name:
Allison K.

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Great bike!

Great bike!

Would Recommend?
No

Verified Buyer

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Name:
Guest G.

Helpful?

My first mountain bike was

My first mountain bike was a Specialized Hardrock and when I finally decided to upgrade to full suspension (29), I’ll be honest, I shopped around with Trek, Santa Cruz, etc. but all that did was confirm that I love Specialized. This Stumpjumper is light (to me - never rode a carbon frame), great components, and specialized has the best color selection. Great handling uphill, downhill and in between. Great bike!

Would Recommend?
No

Verified Buyer

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Name:
Guest G.

Helpful?

What I expect from Specialized.

What I expect from Specialized. Great product and great customer service! Highly recommend!

Would Recommend?
No

Verified Buyer

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Name:
Guest G.

Helpful?

Best bike for the money

Best bike for the money on the market.

Would Recommend?
No

Verified Buyer

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Name:
Guest G.

Helpful?

Great Bike! One thing though..

This bike is awesome. It feels nimble yet has all the benefits of a full suspension. The bike is a lot of fun to ride because of it's playfulness and superior climbing. My one concern is the NX derailleur. When pedaling with force uphill there is usually a delay/clunky shifting. Just something to keep in mind.

Would Recommend?
No

Name:
Grant

Helpful?

Great bike! Efficient climber and

Great bike! Efficient climber and quick steady descender! It’s the perfect combination of what I’m looking for!

Would Recommend?
No

Verified Buyer

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Name:
Kurt A.

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Pretty sweet

Pretty sweet

Would Recommend?
No

Verified Buyer

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Name:
Guest G.

Helpful?

Great bike

I love this bike, it handles everything really well. Bike park and long pedals it does really well. All the components work great as long as they are adjusted correctly. The reason I gave it 4 stars is that the paint on my bike(I have the satin cast umber/clay colour) chips pretty easily. On the down tube and the chainstays. Next to the chain ring there is a lot of paint missing from what I think is the chain ring hitting at bottom out. Other than that it is a really good playful do it all bike.

Would Recommend?
No

Name:
Jayden

Helpful?

Great bike, one issue

I’ve had this bike for a few months now and absolutely love it, it feels really stable on whatever trails I throw at it. I did however find that when you majorly bottom out your shock that the chainring hits the chainstay, this is a massive design failure. Would still 100% recommend bike.

Would Recommend?
No

Name:
Kori E.

Helpful?

Very happy with this StumpJumper

Upgraded from an alloy StumpJumper circa about 2008. This new bike is lighter, more stable and more nimble. Dropper post easier to use than the after market version I added to the old bike. The 1x drive train is simpler to use than the old 2x version. Flat out great fun to ride on flow trail and keeps its end up over more challenging technical rocks and roots. I added a pair of Crank Bros flat pedals and am very happy with the results. Strongly recommend checking this one out if you are looking for a full suspension bike.

Would Recommend?
No

Name:
Bill

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Great bike

I have been riding a hardtail levo before the stumpy and i cant imagine going back

Would Recommend?
No

Name:
Marin

Helpful?

Awesome bike!

I had a 2019 Stumpjumper and was very happy with it, wanted a new SJ. The new advances in technology are great, this bike is so fun! The SRAM group works perfectly, the bike is set up with excellent parts! I am definitely happy with my purchase, highly recommend Specialized!

Would Recommend?
No

Name:
MountainBiker@ 5.

Helpful?

Amazing bike

Love the new bike. Been riding many different brands for years. My wife and kids have Specialized bikes so I bought one. This bike hits the mark in every category. The ride is effortless and more enjoyable than any bike I’ve been on. Takes the ride to a whole new level.

Would Recommend?
No

Name:
Sean

Helpful?

Great bike

I moved to the Stumpjumper Comp Alloy from an 8 year old full suspension. The modern geometry is fantastic and this bike is a lot more playful than my old one. I feel I can get better power down when climbing and the bike is confidence inspiring on the downhills. I have been able to progress my riding a lot over the 6 months of owning it. I'm 6'0'' 185lbs. S4 sizing is great. I was able to demo this bike before buying and tried both the S3 and S5 as well before buying. I added an MRP bash guard that has definitely been worth it. Only upgrade I would consider in the future is the brakes. They are good and entirely competent, but I had high end shimano brakes on the old bike and notice on really steep fast descents that I'd like just a little more- but this is just nit-picking. I ride in New England- plenty of rocks/roots with up and down, true "trail" bike riding. This bike is great and I hang with friends who have bikes twice this price.

Would Recommend?
No

Name:
ML

Helpful?

Love it

Love this bike, got me into serious single track riding, was able to handle anything I can throw at it including Valemount Bike Park in BC. This is something that I will ride for years to come. My bike is completely stock. The only reason I took one star of is that my rear shock has an issue with lock out switch when switch just moves from fully open into middle position on it's own. It went to Fox for warranty, will see how it goes.

Would Recommend?
No

Name:
Rarik

Helpful?