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Specialized Stumpjumper ST Expert 29 2019 Trail Mountain Bike

SPECIALIZED
£5,000.00
Pay monthly from £172.95

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Product Details

Specialized Stumpjumper ST Expert 29 Carbon MTB

Trail bikes can't usually "shred the gnarly stuff" and "climb with your XC buddies," but we're confident in saying that the Stumpjumper Expert ST 29 is totally capable of both. It combines precise handling, perfect suspension kinematics, and a complete abandon of proprietary nonsense with a slightly steeper geometry, less travel (130mm front/120mm rear), and 29-inch wheels to make it a true "do-it-all" trail bike.

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 3.0" 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 customisation 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.

For the build, you get a solid components package with a full SRAM GX1 Eagle drivetrain, SRAM Guide R disc brakes, RockShox Pike RC fork and a Deluxe RT3 rear shock (130/120mm of travel respectively), and Roval Traverse Carbon 29 wheels.

  • The Stumpjumper ST's asymmetrical, FACT 11m carbon fiber construction is lightweight, stiff, and ready for technical climbs and rowdy descents. It's built off of our 29 Trail Geometry, so it's both capable and comfortable. And with SWAT™ integration in the down tube, a threaded BB, easy cable routing, and a brand new chain silencer, it's ready for anything the trail, or you, throw at it.
  • With three different compression adjustments—open/pedal/lock—incredible damping performance, and our Rx Trail Tune, the RockShox Deluxe RT3 perfectly complements the Stumpjumper.
  • RockShox's Pike is known for its trail performance, and the RC found here has stiff stanchions, a Charger damper, and plenty of sensitivity

THE ULTIMATE TRAIL BIKE STUMPJUMPER

The new Stumpjumper is the ultimate trail bike. Seriously, the damn thing rides like it's on rails. It's the most versatile trail bike we've ever made. And yeah, we're stoked about that, but we're even more excited about how well it's tuned to you. We've said goodbye to proprietary bullshit, focused on your needs, and made, what we feel, is the new benchmark in trail bikes.

Mountain Bike Sizing Guide.

Bike sizing guide by brand.

Technical Specifications

Specialized Stumpjumper ST Expert Carbon 29 2019 
FRAMEFACT 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
FORKRockShox Pike RC, DebonAir, rebound / low-speed compression adjust, tapered steerer, 51mm offset, 15mm Maxle® Stealth thru-axle, 15x110mm Boost™, 130mm of travel
REAR SHOCKRockShox Deluxe RT3, Rx Trail Tune, rebound and 3-position compression adjust, 190x42.5mm
BOTTOM BRACKETSRAM GXP
CASSETTESRAM GX Eagle, 12-speed, 10-50t
CHAINSRAM GX Eagle, 12-speed w/ PowerLock®
CHAINRINGS30T
CRANKSETFC DESC 6K EAGLE B148 24MM 170 BLK 30
FRONT BRAKESRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 200mm rotor
FRONT HUBnot known at time of publication
FRONT TYREButcher, GRID Casing, GRIPTON® compound, 2Bliss Ready, 29x2.3"
GRIPSSpecialized Sip Grip, half-waffle, S/M: regular thickness, L/XL: XL thickness
HANDLEBARSSpecialized Trail, 7050 alloy, 8-degree backsweep, 6-degree upsweep, 27mm rise, 780mm, 31.8mm clamp
PEDALSSpecialized Dirt
REAR BRAKESRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 180mm rotor
REAR DERAILLEURSRAM GX Eagle, 12-speed
REAR HUBnot known at time of publication
REAR TYREPurgatory, GRID casing, GRIPTON® compound, 2Bliss Ready, 29x2.3"
RIMSnot known at time of publication
SADDLEBody Geometry Phenom Comp, Adaptive Edge design, hollow Cr-Mo rails, 143mm
SEAT BINDERSpecialized bolt-type, alloy, 38.6mm
SEATPOSTCommand 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
SHIFT LEVERSSRAM GX Eagle, trigger, 12-speed
SPOKESnot known at time of publication
STEMSpecialized Trail, forged alloy, 4-bolt, 5mm rise

Disclaimer

Our suppliers reserve the right to change specifications and prices without notice. Edinburgh Bicycle Cooperative will do all it can to maintain prices and specifications on this web site, however we do reserve the right to change specifications and prices without notice. Similarly, despite the wonders of modern computers, it is realistic to expect the colour of any item bought to differ subtly from the image online.