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STUMPJUMPER

SINGLETRACK FLOW FINDER

Combining the lightweight efficient DNA of the Epic EVO with the benchmark handling and capability of the new Stumpjumper EVO, the new Stumpjumper is the ultimate singletrack flow finder. It climbs and accelerates like it has a motor, descends with authority, and flat out tears through every conceivable trail condition. There’s never been an all-round trail bike this light, this efficient, this capable.

STUMPJUMPER

SINGLETRACK FLOW FINDER

Combining the lightweight efficient DNA of the Epic EVO with the benchmark handling and capability of the new Stumpjumper EVO, the new Stumpjumper is the ultimate singletrack flow finder. It climbs and accelerates like it has a motor, descends with authority, and flat out tears through every conceivable trail condition. There’s never been an all-round trail bike this light, this efficient, this capable.

SINGLETRACK FLOW FINDER

STUMPJUMPER

Combine the pure speed DNA of the Epic EVO with the benchmark capability of the new Stumpjumper EVO and you end up with the lightest, most efficient, and most capable 130/140mm trail bike around.

SINGLETRACK FLOW FINDER

STUMPJUMPER

Combine the pure speed DNA of the Epic EVO with the benchmark capability of the new Stumpjumper EVO and you end up with the lightest, most efficient, and most capable 130/140mm trail bike around.

THE GEOMETRY OF CONTROL

The generous cockpit centers you on the bike, improving traction and corner control. The low bottom bracket, slack headtube angle and reduced fork offset keep things stable in the rough. A steep seat tube optimizes power output and climbing balance. Short chainstays keep things nimble.

All-New Sidearm Frame

We pulled out all the stops to lighten and stiffen up the frame, and what we arrived at was a vastly more efficient structure with a new sidearm design. The sidearm design directly connects all three mounting points of the rear-end and shock to the frame, and this creates a significant increase in both stiffness and performance over bumps. More explicitly, frame flex has been minimized when the rear suspension is active. In CAD, we were able to put the new 3D shape against the last iteration of the Stumpjumper, and with Finite Element Analysis (FEA), we were able to prove that the new layout was 20% more efficient. At the end of all of this, we've ended up with one of the lightest trail frames on the market.

ADJUSTABLE GEOMETRY

To hone handling to your style and terrain, simply switch the FlipChip at the rear shock eye to change bottom bracket height by 7mm and headtube angle by one-half degree. Low and lax delivers more stability, while high and steep makes for a more nimble ride.

NOTHING IS LIGHTER AND STIFFER

The frame is the backbone of the bike. It’s the origin of control and efficiency, and it’s the centerpiece of any serious weight saving effort. The full Stumpjumper frame assembly* (barely) tips the scales at an unbelievable 5.3 lbs (2,420g), but we didn’t compromise in our quest for light weight. The Stumpy punches above its weight, setting the bar for mid-travel trail bikes in handling characteristics, pedaling efficiency and trail toughness.

*Weight of a production S-4 Stumpjumper frame including paint, shock, assembly hardware, link, carbon extension, molded downtube and chainstay protectors, axle, seat clamp.

HEY LAZY CARBON, BEAT IT!

The shape of a composite frame determines the vast majority of that frame’s weight, stiffness and durability. After crunching countless Finite Element Analysis calculations, we optimized the shape of each of the Stumpy’s frame tubes and their intersections, eliminating “lazy” material that would otherwise hide in unoptimized corners, thereby ensuring that every fiber is delivering the most strength and stiffness it can. The result is maximum performance and minimal weight.

THE GEOMETRY OF CONTROL

The generous cockpit centers you on the bike, improving traction and corner control. The low bottom bracket, slack headtube angle and reduced fork offset keep things stable in the rough. A steep seat tube optimizes power output and climbing balance. Short chainstays keep things nimble.

THE CAVIAR OF CARBON FIBER

To achieve breakthrough weight and stiffness goals, the Stumpjumper employs the strongest, most expensive carbon we have ever used in a mountain bike frame. The result? Climbing speed and flickable handling of a lightweight, along with stiffness that delivers wicked pedaling efficiency and telepathic handling. You really can have it all.

ADJUSTABLE GEOMETRY

To hone handling to your style and terrain, simply switch the FlipChip at the rear shock eye to change bottom bracket height by 7mm and headtube angle by one-half degree. Low and lax delivers more stability, while high and steep makes for a more nimble ride.

RIDER FIRST

Our Rider-First Engineered™ process delivers the optimal balance of tuned stiffness, weight and ride quality from all six sizes, ensuring every rider experiences the same ultimate trail ride characteristics.

SWAT

READY FOR ANYTHING

The SWAT door is a masterpiece of carbon fiber construction and spatial optimization that ensures you’ll be ready for whatever the trail dished out. Conveniently and cleanly stash everything from spare tubes and CO2 cartridges to a windbreaker and a banana (careful with that last one).

NOTHING IS LIGHTER AND STIFFER

The frame is the backbone of the bike. It’s the origin of control and efficiency, and it’s the centerpiece of any serious weight saving effort. The full Stumpjumper frame assembly* (barely) tips the scales at an unbelievable 5.3 lbs (2,420g), but we didn’t compromise in our quest for light weight. The Stumpy punches above its weight, setting the bar for mid-travel trail bikes in handling characteristics, pedaling efficiency and trail toughness.

*Weight of a production S-4 Stumpjumper frame including paint, shock, assembly hardware, link, carbon extension, molded downtube and chainstay protectors, axle, seat clamp.

SUSPENSION OF DISBELIEF

130mm of Rx-Tuned rear travel delivers a ride feel that is lively and balanced, yet capable of absorbing big hits unlike any other mid-travel trail bike. Thanks to the combination of the progressive leverage ratio and mildly progressive spring rate what you feel on the trail is a playful, snappy ride for the first two-thirds of travel, then - thanks to the increasing spring rate - excellent bump force management and resistance to bottoming in big events. Believe it.

RX TUNE

YOUR PRESCRIPTION FOR FLOW

Our trail obsessed team of engineers stay awake at night thinking of how to make suspension work better. For the Stumpjumper they tailored every aspect that contributes to final suspension characteristics – kinematics, leverage curves, damping and spring rates – to work together in harmony to deliver a highly controlled, responsive and precise ride that handles bump forces like a bike with far more travel.

S-SIZING

S-Sizing is based on what matters; rider size and style, not inseam. Six sizes, all with similar headtube lengths and standover allow you to choose the size that best suits your individual style. Smaller S-Size numbers are going to be more nimble, thanks to their shorter reach and front-center measurement, while bigger S-Sizes deliver more stability and a roomier ride.

HEY LAZY CARBON, BEAT IT!

The shape of a composite frame determines the vast majority of that frame’s weight, stiffness and durability. After crunching countless Finite Element Analysis calculations, we optimized the shape of each of the Stumpy’s frame tubes and their intersections, eliminating “lazy” material that would otherwise hide in unoptimized corners, thereby ensuring that every fiber is delivering the most strength and stiffness it can. The result is maximum performance and minimal weight.

THE CAVIAR OF CARBON FIBER

To achieve breakthrough weight and stiffness goals, the Stumpjumper employs the strongest, most expensive carbon we have ever used in a mountain bike frame. The result? Climbing speed and flickable handling of a lightweight, along with stiffness that delivers wicked pedaling efficiency and telepathic handling. You really can have it all.

RIDER FIRST

Our Rider-First Engineered™ process delivers the optimal balance of tuned stiffness, weight and ride quality from all six sizes, ensuring every rider experiences the same ultimate trail ride characteristics.

SWAT

READY FOR ANYTHING

The SWAT door is a masterpiece of carbon fiber construction and spatial optimization that ensures you’ll be ready for whatever the trail dished out. Conveniently and cleanly stash everything from spare tubes and CO2 cartridges to a windbreaker and a banana (careful with that last one).

SUSPENSION OF DISBELIEF

130mm of Rx-Tuned rear travel delivers a ride feel that is lively and balanced, yet capable of absorbing big hits unlike any other mid-travel trail bike. Thanks to the combination of the progressive leverage ratio and mildly progressive spring rate what you feel on the trail is a playful, snappy ride for the first two-thirds of travel, then - thanks to the increasing spring rate - excellent bump force management and resistance to bottoming in big events. Believe it.

RX TUNE

YOUR PRESCRIPTION FOR FLOW

Our trail obsessed team of engineers stay awake at night thinking of how to make suspension work better. For the Stumpjumper they tailored every aspect that contributes to final suspension characteristics – kinematics, leverage curves, damping and spring rates – to work together in harmony to deliver a highly controlled, responsive and precise ride that handles bump forces like a bike with far more travel.

S-SIZING

S-Sizing is based on what matters; rider size and style, not inseam. Six sizes, all with similar headtube lengths and standover allow you to choose the size that best suits your individual style. Smaller S-Size numbers are going to be more nimble, thanks to their shorter reach and front-center measurement, while bigger S-Sizes deliver more stability and a roomier ride.

One-Piece Rear Triangle

Stumpjumper’s one-piece rear triangle improves torsional and lateral stiffness, which in turn enhances responsiveness and pedaling efficiency. These lateral and torsional stiffness gains are achieved by eliminating the flex intrinsic in mechanical pivots.

FlexStay

Through precise shaping of the seatstays and chainstays, along with utilization of appropriate composites, we created a flex zone along the seatstay, above the brake mount, that flexes to allow suspension travel without any rear end pivot hardware.

 
The Missing Link

All in all, the FlexStay allows us to ditch 55-grams of hardware, enhance lateral chassis stiffness, reduce maintenance, and precisely match suspension kinematics and chassis stiffness. The result? The most efficient, nimble, trail bike we’ve ever made.

SHRED IN SILENCE

You won’t realize how much chain-slap was bumming your ride until it’s gone. Our chainstay protector makes the drivetrain virtually silent by disrupting the sine-wave of an unchecked chain clattering away in the rough. The result is the transcendent silence of one hand clapping.

THE ULTIMATE (ALLOY) TRAIL BIKE

Shaped by everything we’ve learned from 40 years of building Stumpjumpers, the alloy Stumps are 100% purebred, cutting edge trail bikes. A look under the hood bears this out: they employ the same benchmark geo, Rx-Tuned suspension, ride quality, and S-sizing as their carbon siblings. So it should come as no surprise that the alloy Stumpjumpers pack a trail performance punch beyond what you’ll find from any other aluminum trail bike.

FINISH AND THE FEELS

The graphics on the Stumpjumpers are inspired by the mountainous terrain that we love to ride. We wanted to capture the way light plays in nature; how it can cast the mountains in jagged relief but also soften and smooth depending on how the light hits, illuminating both hard lines and subtle fades. Multiple coats of ultra-high-quality paint result in a finish so smooth and deep it feels like you could dive into it.

One-Piece Rear Triangle

Stumpjumper’s one-piece rear triangle improves torsional and lateral stiffness, which in turn enhances responsiveness and pedaling efficiency. These lateral and torsional stiffness gains are achieved by eliminating the flex intrinsic in mechanical pivots.

FlexStay

Through precise shaping of the seatstays and chainstays, along with utilization of appropriate composites, we created a flex zone along the seatstay, above the brake mount, that flexes to allow suspension travel without any rear end pivot hardware.

 
The Missing Link

All in all, the FlexStay allows us to ditch 55-grams of hardware, enhance lateral chassis stiffness, reduce maintenance, and precisely match suspension kinematics and chassis stiffness. The result? The most efficient, nimble, trail bike we’ve ever made.

STUMPJUMPER CREATORS

Being tasked with creating the rippingest trail bike we’ve ever made is no small feat. Steve Saletnik, Peter Denk, Matthias Segerer, Chance Ferro, Kayla Clarot, Luke Beemer, Fred Chiu, Tero Jakku, and more than a dozen others dug into every aspect of engineering, suspension dynamics, design, and R&D to do exactly that.

PRODUCT MANAGER

Steve Saletnik

Design & Composites Engineering

Matthias Segerer

Suspension R&D

Chance Ferro

Composites Engineering

Peter Denk

MTB Developer

Fred Chiu

Industrial Design

Tero Jakku

Graphic Design

Kayla Clarot

Graphic Design

Luke Beemer

Butcher and Purgatory

With a World-Cup proven Butcher GRID 2Bliss up front biting confidently under fast cornering and hard breaking and a Purgatory Butcher GRID 2Bliss rear delivering traction and control in soft soil or hard pack, Stumpjumper is ready for anything the trail throws at you.

Trail-Series Alpha Jacket

Bring warmth to your coldest days on the trail with our Trail-Series Alpha Jacket. Using Polartec® Alpha®, the soft, inside liner doesn’t juyst keep you warm, it quickly evaporates sweat keeping you dry and comfortable. With a casual style, it's right at home on a new Stumpjumper or enjoying a post-ride beverage around the fire pit.

Ambush with ANGi

The new Stumjumper brings confidence to every rider, every style, in every trail scenario. So, when you’re ripping down the trail, the last thing you need to worry about is if your helmet will protect you in a crash. This is why we created the Ambush with ANGi, the lightest and most ventilated extended coverage helmet available.

Trail-Series Thermal Gloves

Don’t let chilly weather stop you from hitting the right lines on your Stumpjumper with our new Trail-Series Thermal Gloves. Featuring a wind-resistant 3-layer softshell upper, these gloves are perfect for long trail rides when the mercury drops. And they keep you warm with a minimum of bulk to ensure a confident and comfortable grip on the bars.

SHRED IN SILENCE

You won’t realize how much chain-slap was bumming your ride until it’s gone. Our chainstay protector makes the drivetrain virtually silent by disrupting the sine-wave of an unchecked chain clattering away in the rough. The result is the transcendent silence of one hand clapping.

THE ULTIMATE (ALLOY) TRAIL BIKE

Shaped by everything we’ve learned from 40 years of building Stumpjumpers, the alloy Stumps are 100% purebred, cutting edge trail bikes. A look under the hood bears this out: they employ the same benchmark geo, Rx-Tuned suspension, ride quality, and S-sizing as their carbon siblings. So it should come as no surprise that the alloy Stumpjumpers pack a trail performance punch beyond what you’ll find from any other aluminum trail bike.

FINISH AND THE FEELS

The graphics on the Stumpjumpers are inspired by the mountainous terrain that we love to ride. We wanted to capture the way light plays in nature; how it can cast the mountains in jagged relief but also soften and smooth depending on how the light hits, illuminating both hard lines and subtle fades. Multiple coats of ultra-high-quality paint result in a finish so smooth and deep it feels like you could dive into it.

STUMPJUMPER CREATORS

Being tasked with creating the rippingest trail bike we’ve ever made is no small feat. Steve Saletnik, Peter Denk, Matthias Segerer, Chance Ferro, Kayla Clarot, Luke Beemer, Fred Chiu, Tero Jakku, and more than a dozen others dug into every aspect of engineering, suspension dynamics, design, and R&D to do exactly that.

PRODUCT MANAGER

Steve Saletnik

Design & Composites Engineering

Matthias Segerer

Suspension R&D

Chance Ferro

Composites Engineering

Peter Denk

MTB Developer

Fred Chiu

Industrial Design

Tero Jakku

Graphic Design

Kayla Clarot

Graphic Design

Luke Beemer

Butcher and Purgatory

With a World-Cup proven Butcher GRID 2Bliss up front biting confidently under fast cornering and hard breaking and a Purgatory Butcher GRID 2Bliss rear delivering traction and control in soft soil or hard pack, Stumpjumper is ready for anything the trail throws at you.

Trail-Series Alpha Jacket

Bring warmth to your coldest days on the trail with our Trail-Series Alpha Jacket. Using Polartec® Alpha®, the soft, inside liner doesn’t juyst keep you warm, it quickly evaporates sweat keeping you dry and comfortable. With a casual style, it's right at home on a new Stumpjumper or enjoying a post-ride beverage around the fire pit.

Ambush with ANGi

The new Stumjumper brings confidence to every rider, every style, in every trail scenario. So, when you’re ripping down the trail, the last thing you need to worry about is if your helmet will protect you in a crash. This is why we created the Ambush with ANGi, the lightest and most ventilated extended coverage helmet available.

Trail-Series Thermal Gloves

Don’t let chilly weather stop you from hitting the right lines on your Stumpjumper with our new Trail-Series Thermal Gloves. Featuring a wind-resistant 3-layer softshell upper, these gloves are perfect for long trail rides when the mercury drops. And they keep you warm with a minimum of bulk to ensure a confident and comfortable grip on the bars.

Flip Chip

The Flip Chip allows you to change the frame geometry with ease, all to support your riding style. There are two settings, High and Low, and when you "flip the chip," you effectively change the bottom bracket height by 6mm and the head tube angle by half-a-degree.

Ultimate Adjustability

This is the best mountain bike we've ever made when it comes to customizing it however you want. All of the configurations use standard stroke and eye-to-eye metric shocks, so you won't find Shock Block anywhere. So yeah, if you want to swap shocks—be our guest. You won't have any problems from us or the Stumpjumper. We've also ditched the PF30 bottom bracket of yesteryear in favor of moving back to a threaded BB system, and both 27.5 and 29 frames can fit up to 3.0" tires, now. You'll still want to check with your fork manufacturer to make sure a high-volume tire can fit, but this should be music to everyone's ears.

Improved Cable Routing

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 housing and it'll come out the other end. No more lazy loop, hidden stashes of magnets, pokey spokes, or pillows to cry in.

Quieter Drivetrains Await

The new chainstay protector makes the drivetrain virtually silent, and it pretty much makes chain slap a thing of the past, too. The nubs on this protector disrupt the slap of the chain and this reduces the overall movement and sound of the chain.

Improved Cable Routing

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 housing and it'll come out the other end. No more lazy loop, hidden stashes of magnets, pokey spokes, or pillows to cry in.