Men's Stumpjumper ST Comp Alloy 29

2019 Men's Stumpjumper ST Comp 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 FOX FLOAT Rhythm 34 fork with 130mm of travel, a FOX FLOAT DPS Performance rear shock with 120mm of travel, and wide alloy wheels.

Technical Specifications

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

SUSPENSION

FORK

FOX FLOAT Rhythm 34, GRIP Damper, 51mm offset, 2-position sweep adjust, 15x110mm, tapered alloy steerer, 130mm of travel

REAR SHOCK

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

COCKPIT

HANDLEBARS

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

STEM

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

GRIPS

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

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/XL: 150mm of travel

SEAT BINDER

Specialized bolt-type, alloy, 38.6mm

BRAKES

FRONT BRAKE

Shimano MT-501, hydraulic disc, resin pad, 200mm

REAR BRAKE

Shimano MT-501, hydraulic disc, resin pad, 180mm

DRIVETRAIN

SHIFT LEVERS

Shimano SLX, 11-speed

REAR DERAILLEUR

Shimano SLX, Shadow Plus, 11-speed

CRANKSET

RaceFace Ride, 24mm spindle, 170mm crankarm

CASSETTE

Shimano SLX, 11-speed, 11-46t

CHAINRINGS

Steel, 30T

CHAIN

KMC X11, 11-speed w/ Missing Link™

BOTTOM BRACKET

Threaded BB, 24mm spindle

WHEELS & TIRES

FRONT HUB

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

RIMS

Double-wall, 27mm internal width

SPOKES

Stainless, 14g

REAR HUB

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

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 colourway, frame size, and component variation. Specifications are subject to change without notice.

Geometry

	S	M	L	XL
Crank Length	170mm	170mm	170mm	170mm
Handlebar Width	780mm	780mm	780mm	780mm
Stem Length	45MM	45MM	45MM	45MM
Saddle Width	143mm	143mm	143mm	143mm
Seatpost Length	376mm	438mm	438mm	438mm
Stack	612mm	612mm	635mm	649mm
Reach	415mm	435mm	455mm	480mm
Head Tube Length	100mm	100mm	125mm	140mm
Head Tube Angle	67.5°	67.5°	67.5°	67.5°
BB Height	333mm	333mm	333mm	333mm
BB Drop	39mm	39mm	39mm	39mm
Trail	99mm	99mm	99mm	99mm
Fork Length, Full	540mm	540mm	540mm	540mm
Fork Rake/Offset	51mm	51mm	51mm	51mm
Front Centre	708mm	728mm	758mm	789mm
Chainstay Length	437mm	437mm	437mm	437mm
Wheelbase	1143mm	1163mm	1192mm	1223mm
Top Tube Length, Horizontal	570mm	593mm	624mm	657mm
Bike Standover Height	750mm	756mm	769mm	770mm
Seat Tube Length	380mm	410mm	455mm	505mm
Seat Tube Angle	75.8°	75.5°	75.1°	74.7°

Manual Downloads

Specialized Bicycle Owner's Manual (All Languages)

Dodatek - POUŽITÍ TRENAŽÉRU

Stumpjumper Sidearm Pivot Parts Schematic

Stumpjumper FSR User Manual

2019 Rider/Bike Weight Limits and Terrain Conditions

Stumpjumper Sidearm Small Parts Schematic

Specialized Bicycle Owner's Manual (English)

Specialized Bicycle Owner's Manual Addendum: Riding With Kids

Trainer Usage Addendum to the Bicycle Owner's Manual

Rider Reviews

5
5 Reviews

06/17/2020

Winning the bike vs $$ race by a mile

I've ridden this bike for hundreds of miles over the last 10 months. It's is as solid today as day one, and far exceeds my ability to test its limits. Crushes PA roots and rocks with complete disregard for their well-being. Climbs well, but likely better with a lighter rider. Just this week the very first thing went wrong when i broke a spoke. Again, under a lighter rider that would probably still be in one piece. Highly recommended.

Name:: Mike '.

Helpful?

06/15/2020

Quite Possibly the PERFECT Bike for me

Would I recommend this bike to a friend? Yep! Actually I already did, and he loves his Stumpy ST too! In Mid-Michigan we don't have the luxury of blazing downhill, so a normal weekly trip to the trail will have a pretty balanced blend of climbs and downhills where you have to create your own flow. This bike combines the perfect amount of pedal efficiency to rip uphill and is more than ready and capable to handle anything I throw at it in the lower part of the state. Last year I would struggle to keep up with my group of buddies both up hill and downhill, now they're all struggling to keep up with me. Being 5'9 and about 185lbs, I've got the bike dialed in almost perfectly and have yet to bottom out in my 75 miles while taking as large as some 6ft or so drops. I originally had an Ibis Ripmo AF on order but thanks to the national bike shortage I leaned on a local(ish) shop and fell into the ST. For my local terrain, I chose the ST over the normal long travel stumpy and really don't think I could be happier. This bike has a lot to offer on both sides of the hill.

Name:: Andy

Helpful?

06/16/2019

ST version is the perfect in-between XC/Trail bike!

Perfect for smaller drops/technical terrain but can climb like a mountain goat! This bike is buttery smooth on flowy trails and is the perfect in-between XC/Trail bike. Even as a larger rider, the Shimano brakes and Fox suspension performs flawlessly! Smaller drops of 3-4 feet; rocky/rooty terrain; or flowy XC-style trails are all in this bikes wheelhouse! I'm about 6' 1"", 225 lbs and ride a size Large.

Name:: Jay

Helpful?

04/09/2019

Incredibly Stable Platform

I purchased this bike a few weeks ago and through a handful of rides, absolutely no regrets. It is so stable at speed and have had no reason to lockout the shock for climbing to date. I simply can't feel any pedal bob when climbing to warrant the lockout. It is a touch heavy, but it just powers through the bumps and roots like a tank.

Name:: Davin

Helpful?

My Location

Use My Location

Set Your Preferred Retailer