Image of Specialized S-Works Stumpjumper ST 29
2019

Specialized S-Works Stumpjumper ST 29

Specialized S-Works Bikes 2019

12250

All Mountain

At a glance

The 2019 Specialized S-Works Stumpjumper ST 29 is an All Mountain Carbon mountain bike. It sports 29" wheels, is priced at $12,250 AUD, has Fox suspension and a SRAM drivetrain. The bike is part of Specialized's S-Works Bikes range of mountain bikes.

We love the fast and planted feeling of the new Stumpjumper, but not everyone needs 150mm of travel. And if you’re in the market for a trail bike that’s more nimble and snappy in hard accelerations and long climbs, the S-Works Stumpjumper ST 29 should be your first choice. Its shorter travel (130mm front/120mm rear), and slightly steeper geometry, bring out the true ‘feel’ of the trail—making popping off lips and railing berms even more lively and fun. 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, shapes, and the layout. We started by creating our own mountain-specific stiffness test, and then we looked at the layout with Finite Element Analysis (FEA) to see where we could get the biggest stiffness improvements. This led to a big discovery: The Large and X-Large frames needed more front-end stiffness while the Smalls and Mediums were just fine. We were able to create a frame design that was 20% more efficient. And in the end, this proved to be one of the lightest trail frames on the market, today. When designing the frame with the stiffness targets being a main goal, we developed a radical new sidearm design. The front-end and rear-end are connected at three points, and the sidearm helps keep all these points super stiff and connected, all while taking about 100 grams out of the rear-end. More explicitly, this minimizes frame flex when the rear suspension is active. 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. We revamped the SWAT™ box, too, making it sleeker, lighter, and with more volume. 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. Lastly, we seriously couldn’t make cable routing any easier on carbon models. Full tubes can be found throughout the carbon frame, so all you have to do is push the cable and it’ll come out the other end. No more lazy loop, hidden stashes of magnets, pokey spokes, or pillows to cry in. The build features only top-of-the-line parts, like a full SRAM XX1 Eagle drivetrain, SRAM Guide RSC disc brakes, FOX Factory front and rear suspension (130/120mm respectively), and the best carbon wheels money can buy, the Roval Traverse SL 29s.

Where To Buy

Reviews

Specifications

Frameset
  • Frame
    FACT 11m, full carbon chassis and rear end, asymmetrical design, 29 Trail Geometry, SWAT™ Door integration, threaded BB, fully enclosed internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 120mm of travel
  • Fork
    FOX FLOAT 34 Factory, FIT4 damper, 3-position adjustment, Kashima Coating, 15x110mm Kabolt axle, 51mm offset, 130mm of travel
  • Shock
    FOX FLOAT DPS Factory, Rx Trail Tune, EVOL Air sleeve, Kashima Coat, 3-position adjustment w/ Open Mode Adjustment, 190x42.5mm
Wheels
  • Hubs
    [F] Roval Traverse SL, sealed cartridge bearings, 15mm thru-axle, 110mm spacing, 24h [R] Roval Traverse SL, DT Swiss Star Ratchet, 54t engagement, SRAM XD driver body, 12mm thru-axle, 148mm spacing, 28h
  • Wheels
    Roval Traverse SL 29, hookless carbon, 30mm inner width, tubeless ready, hand-built, 24/28h
  • Wheel Size
    29"
  • Spokes
    DT Swiss Revolution
  • Tires
    [F] Butcher, GRID Casing, GRIPTON® compound, 2Bliss Ready, 29x2.3" [R] Purgatory, GRID casing, GRIPTON® compound, 2Bliss Ready, 29x2.3"
Drivetrain
  • Chain
    SRAM XX1 Eagle, 12-speed
  • Crank
    SRAM XX1 Eagle, Boost™ 148, 170mm crankarm, 24mm spindle
  • Bottom Bracket
    SRAM GXP
  • Rear Derailleur
    SRAM XX1 Eagle, 12-speed
  • Shifters
    SRAM XX1 Eagle, trigger, 12-speed
  • Cassette
    SRAM X01 Eagle, 12-speed, 10-50t
  • Pedals
    Specialized Dirt
Components
  • Brakeset
    [F] SRAM Guide RSC, hydraulic disc, organic pads, Guide S4 4-piston caliper, 200mm [R] SRAM Guide RSC, hydraulic disc, organic pads, Guide S4 4-piston caliper, 180mm
  • Handlebar
    Specialized Trail, FACT Carbon, 6-degree upsweep, 8-degree backsweep, 27mm rise, 780mm, 31.8mm
  • Saddle
    Body Geometry Phenom Expert, hollow titanium rails, carbon fiber base, 143mm
  • Seatpost
    Command Post IRcc, 16-position micro-height adjustable, two-bolt head, bottom mount cable routing, remote SRL lever, 34.9mm, S: 130mm, M/L/XL: 160mm of travel
  • Stem
    Syntace MegaForce 2, 6-degree, 31.8mm clamp

FAQ

Q: How much is a 2019 Specialized S-Works Stumpjumper ST 29?

A 2019 Specialized S-Works Stumpjumper ST 29 is typically priced around $12,250 AUD when new. Be sure to shop around for the best price, and also look to the used market for a great deal.

Q: What size wheels does the 2019 Specialized S-Works Stumpjumper ST 29 have?

The 2019 Specialized S-Works Stumpjumper ST 29 has 29" wheels.

Q: What size 2019 Specialized S-Works Stumpjumper ST 29 should I get?

After measuring your height, use the size chart below to find the typical Specialized S-Works Stumpjumper ST 29 size for your height. Remember that these sizes are a general guide and bike sizes can vary between riders and bikes. The best way to find your size is to go for a test ride.

Rider Height (cm)Rider Height (in)Frame Size
148cm - 158cm4'10" - 5'2"XS
158cm - 168cm5'2" - 5'6"S
168cm - 178cm5'6" - 5' 10"M
178cm - 185cm5'10" - 6'1"L
185cm - 193cm6'1" - 6'4"XL
193cm - 198cm6'4" - 6'6"XXL

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