We’ve heard it all before: “This bike’s for going fast, that one’s for having fun.” “This one pedals well, that one shreds.” Why not make one bike that does everything well? Well, we did, and it's called the S-Works Stumpjumper. Unrivaled handling and stiffness, sublime suspension kinematics, and a complete abandon of proprietary nonsense—it rides like a dream. And with 27.5-inch wheels, this model blends responsiveness with stability to create the pinnacle of trail performance.
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 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.
As with every S-Works build, this S-Works Stumpjumper comes with only top-of-the-line parts, like a full SRAM XX1 Eagle drivetrain, SRAM Guide RSC disc brakes, FOX Factory front and rear suspension (150/150mm respectively), and the best carbon wheels money can buy, the Roval Traverse SL 27.5s.
We have been lucky enough to get out and have a first initial test.
We were able to get out and test what this bike is really like out on the trails. The first thing we noted was the fit. You felt like you were in the bike, part of it. This gave us bags of confidence to push the bike faster and faster. The larger 2.6" tyres gave the bike a solid platform to really push into corners and get your flow on out on the ride. Everyone asks "but does it go uphill.." Our answer is YES and yes again. The FSR suspension linkage keeps a stable platform that means when you stop on those pedals to clear a technical accent you get all the grip and power you need. And when you point it back downhill its grin inspiring with a longer top tube slacker head angle and suspension characteristics that we all want to see, small bump sensitivity, fluid midstroke and a progressive ramp for the big hits.
This bike is a trail ripper!
- The Stumpjumper's asymmetrical, FACT 11m carbon fiber construction is lightweight, stiff, and ready to take on the trail. It's built off our 27.5 Trail Geometry, so it's just the right amount of both capable and comfortable. And with SWAT™ integration in the down tube, a threaded BB, easy cable routing, and an all new chain silencer, it's ready for anything the trail, or you, throw at it.
- FOX FLOAT DPX2 Factory has three modes—Open, Trail, and Firm—that control large compression adjustments on-the-fly. There's also a tool adjust compression adjustment that allows for fine-tuning of the compression in Open mode.
- Tech Specs
Frame FACT 11m, full carbon chassis and rear end, asymmetrical design, 27.5 Trail Geometry, SWAT™ Door integration, threaded BB, fully enclosed internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 150mm of t Rear Shock FOX FLOAT DPX2 Factory, Rx Trail Tune, EVOL Air sleeve, Kashima Coat, 3-position adjustment w/ Open Mode Adjustment, 210x52.5mm Seatpost Specialized bolt-type, alloy, 38.6mm
Customer ReviewsWrite a Review
Be the first to write a review!
Write a Review
Write a review about the Specialized 2019 Men's S-Works Stumpjumper 27.5 Frame by completing the form below. Please complete all fields marked with an *
This item is available for International delivery. Read more.
UK orders are sent using Royal Mail Tracked 48, Royal Mail Recorded or Royal Mail letter post for small, light orders and Parcelforce for heavier, bulky orders. Please allow approx 2-3 days for delivery after the order has been despatched. Large and heavy items, e.g turbo trainers and work stands, will be sent by Parcelforce (UK Mainland only). Overseas orders are sent using Royal Mail International Signed For service and Royal Mail Airsure service (where permitting). Heavier items e.g. bicycles are sent using Parcelforce Worldwide. Delivery times will vary depending on destination, customs clearance, local postal service etc. Please allow up to 14 working days for delivery. Postage costs include Insurance for the value of the order. Bicycles sent within the UK are sent by Parcelforce 48 Hour Service.