Logo Icon
Search Icon
Clear Icon
My Location

Enter your ZIP code so we can provide the most accurate inventory and delivery information.

Location Pin Icon

Use My Location

See Full Map
Clear Icon
Set Your Preferred Retailer
Search icon
Location Pin Icon

Use My Location

See Full Map
My Retailer

None saved

Other Stores Near You

Men's Stumpjumper ST Alloy 29

Icon

2018 Men's Stumpjumper ST Alloy 29

All of you die-hard alloy fans can rejoice. Yes, the new Stumpjumper ST comes in an alloy version, and it may be the most radically designed alloy bike ever made. And with new tube shapes and an asymmetrical design, the Stumpjumper ST Alloy 29 is sure to exceed your expectations of how a trail bike should ride.

Our design goal for the new Stumpjumper was simple—build the ultimate trail bike, one that feels telepathic. And it turns out that this feeling all comes down to stiffness. Think of it this way: when the frame's telling your hands one thing and your feet another, your brain gets confused with the imbalance and the bike feels unstable. In order to fix this, we had to get to work on dialing-in the materials and shapes.

We continued down the suspension path with a custom Rx Trail Tune on both the fork and rear shock. Suspension performance is highly dependent on frame, wheel, and rider size, so we use our Rx Tune to get each bike to land in the middle of the adjustment spectrum, and this gives you the biggest possible range to fine-tune your ride. Another focal point of the tune was matching the suspension characteristics between wheel sizes—we developed a specific Rx Tune for each platform. So, no matter what wheel size you prefer, you'll get perfectly linear suspension.

Steps were also taken to make this bike easy to live with. Threaded bottom brackets make a triumphant return, and we made room for up to a 2.6" tire. You're also free to run whatever aftermarket rear shock you want, since we're using standard metric shocks. And customization is furthered with a Flip Chip that lets you to dial-in your Stumpy to your riding style. Switch it from High to Low and it drops your bottom bracket 6mm and slackens the head tube by half-a-degree. Little details also jump out to surprise you, like a newly designed ribbed chainstay protector that makes chain slap a thing of the past and nearly silences the drivetrain.

The build here is no-nonsense with a focus on dependable, high-performing parts, like Shimano SLX front and rear derailleurs, Tektro Gemini disc brakes, a RockShox Recon RL fork with 130mm of travel, a custom X-Fusion 02 Pro RL rear shock with 120mm of travel, and wide alloy wheels.

Technical Specifications

Add Icon

FRAMESET

FRAME

M5 alloy chassis and rear end, asymmetrical design, 29 Trail Geometry, threaded BB, fully enclosed internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 120mm of travel

SEAT BINDER

Specialized bolt-type, alloy, 38.6mm

SUSPENSION

REAR SHOCK

X-Fusion 02 Pro RL, Rx Trail Tune, rebound adjust, lockout 190x42.5mm

FORK

RockShox Recon RL, Solo Air, 51mm offset, rebound adjust, lockout, 15x110mm Boost™ Maxle® Lite thru-axle, 130mm of travel

COCKPIT

STEM

Specialized, 3D-forged alloy, 4-bolt, 7-degree rise

HANDLEBARS

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

GRIPS

Specialized Sip Grip, half-waffle, slip-on

SADDLE

Body Geometry Henge Sport, steel rails, 143mm

SEATPOST

Alloy, two-bolt clamp, 34.9mm

BRAKES

FRONT BRAKE

Tektro Gemini Comp, hydraulic disc, resin pad, 200mm rotor

REAR BRAKE

Tektro Gemini Comp, hydraulic disc, resin pad, 180mm rotor

DRIVETRAIN

REAR DERAILLEUR

Shimano SLX, Shadow Plus, 11-speed

SHIFT LEVERS

Shimano SLX, 11-speed

CASSETTE

SunRace, 11-speed, 11-46t

CHAIN

KMC X11, 11-speed w/ Missing Link™

CRANKSET

SRAM NX, Boost™, direct-mount XSYNC, Powerspline

CHAINRINGS

30T

BOTTOM BRACKET

SRAM Power Spline

WHEELS

RIMS

700C disc, double-wall alloy, pinned

FRONT HUB

Specialized, sealed cartridge bearings, 15x110mm spacing, 32h

REAR HUB

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

SPOKES

Stainless, 14g

FRONT TIRE

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

REAR TIRE

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

INNER TUBES

Standard, Presta valve

ACCESSORIES

PEDALS

Specialized Dirt

* 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
SMLXL
Crank Length170MM170MM170MM170MM
Handlebar Width780mm780mm780mm780mm
Stem Length50mm50mm50mm50mm
Saddle Width143mm143mm143mm143mm
Seatpost Length375mm375mm435mm435mm
Stack612mm612mm635mm649mm
Reach415mm435mm455mm480mm
Head Tube Length100mm100mm125mm140mm
Head Tube Angle67.5°67.5°67.5°67.5°
BB Height333mm333mm333mm333mm
BB Drop39mm39mm39mm39mm
Trail99mm99mm99mm99mm
Fork Length, Full540mm540mm540mm540mm
Fork Rake/Offset51mm51mm51mm51mm
Front Center708mm728mm758mm789mm
Chainstay Length437mm437mm437mm437mm
Wheelbase1143mm1163mm1192mm1223mm
Top Tube Length, Horizontal570mm593mm624mm657mm
Bike Standover Height750mm756mm769mm770mm
Seat Tube Length380mm410mm455mm505mm
Seat Tube Angle75.8°75.5°75.1°74.7°
Geometry

Rider Reviews

  • 4.7
  • 20 Reviews

Nice entry level mtb

I have had this bike for 1.5 yrs. Good entry level mtb. Problems - the rear shock broke, but that gave me an excuse to upgrade. I have not had problems with the drivetrain as other review(s) mention. I understand some of the brake complaints I read, but they are adequate and certainly ok for the price point. The bike is heavy, but coming from an older mtb with old style geometry, this climbs WAY better. If I did it again I would spend a little more in the same stump jumper line, but this was a good entry point to see if I wanted to ride again. I can't justify spending twice the price on a new one with higher specs at this point. Solid value.


Name:
Old T.

Helpful?

enjoying alot

i am pleased.


Name:
Paul

Helpful?

Fun MTB

As the base model of the Stumpjumper line, this bike had the basics you need to get going. The first thing that started giving me trouble is the drive train. I upgraded to 34T up front and the matching SLX cassete. This affordable upgrade brought some life back to the bike, making the entry level suspension work better as well.


Name:
James

Helpful?

Holy Smokes...LOVE it

I researched the best budget full suspension bike (that I could afford). I had some things I wanted...one important factor was upgradable. But so far, this bike rocks (no pun intended). Great bike to get back into riding, learning new skills while riding in the PNW. First upgrade will be a dropper post (saving my pennies); otherwise, the rest will be gravy.


Name:
Tyson

Helpful?

Great Full Suspension bike

I have nothing bad to say about this bike. I had already bought many specialized bikes and knew how good they were so I was a no brainer going with them. The new rear suspension on this bike is amazing. It is nice and firm on the climbs and squishy on the descents. Specialized really know what they are doing.


Name:
Luke H.

Helpful?

Good Value

This bike is a good value. I love how much confidence I get from this bike. My riding has greatly improved in cornering, jumping, and descending at speed. The only thing negative I can say is the brakes are quite disappointing. The brakes lack power and feel as well as there is too much travel in the brake level. I have replaced the brakes with Shimano M395 which is a big improvement over the stock Tekro brakes. If you plan to ride aggressively, then I recommend you include the cost of upgrading the brakes when pricing this bike.


Name:
Don

Helpful?

I would buy again

This thing performs unbelievable.... i just did my first 25 mile race with it and i couldnt be happier with the way it performed! Confidence inspiring is an understatement! I did change the rear tire (wasnt awesome) and cut the bars down to 720mm but thats my preference


Name:
Billy

Helpful?

I would buy this Product again

I recently visited my son in Davidson North Carolina and being a avid mountain biker at home I was keen to ride the trails near Davidson. After riding his Specialized Cambur at Fisher Farm I decided to hire a bike for myself so we could ride together. Mark at The Cycle Path in Cornelius fixed me up with a Stumpy,what a great bike. We rode Fisher Farm, Lake Norman State Park and the National White Water Center . I had a ball,what great places to ride. When I got back to Australia I purchased a Stumpjumper from Cycle Zone Mooloolaba , thanks to John and the team for great service. Attention SPECIALIZED, because of the top service and helpful advice from Mark at The Cycle Path in Cornelius ( even though he new I couldn't buy a bike from him) he was only to happy to help and promote your bikes. That's the way to win customers. I' m Rapped in my new Stumpy.


Name:
Bruce

Helpful?

Very nice ride for the money

Having researched quite a few bikes I determined this was the one for me. Eats up many trails in my area without issue. A dropper post would have been the icing on the cake but I'll get one once the market starts moving to 34.9 and become more affordable. Until then I'll be in the trails.


Name:
Js

Helpful?

Love this bike!!

Great bike for the price point, added the command wu dropper and it crushes trails.


Name:
Chef L.

Helpful?