Icon
Clear Icon
Search Icon
Clear Icon
Search Icon

Stumpjumper Comp Alloy

Icon

Stumpjumper Comp Alloy

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

Add Icon

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: 175mm, S6: 190mm

Stem

Alloy Trail Stem, 35mm bar bore

Handlebars

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

Tape

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

Add Icon
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
  • 28 Reviews

Great bike. Rides well, easy

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


Verified Buyer

Icon

Name:
Kimble S.

Helpful?

AWESOME

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


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.


Name:
Grant

Helpful?

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.


Name:
Will

Helpful?

dual suspension bike

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


Name:
mia

Helpful?

Love this bike!!

Love this bike!!


Verified Buyer

Icon

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.


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.


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.


Name:
John

Helpful?

Having a new blast with

Having a new blast with my new bike!


Verified Buyer

Icon

Name:
Guest G.

Helpful?