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STUMPJUMPER

Singletrack Flow Finder

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.

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Shop Stumpjumper EVO

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.

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Instant Rowdy

STUMPJUMPER EVO

The Stumpjumper EVO is your seat in the eye of the hurricane, delivering unprecedented control, capability and adjustability, along with unexpected climb-ability from a 150/160mm trail bike.

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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.

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 painted 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. This ensures that every fiber is delivering the most strength and stiffness it can, resulting in 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 light weight, 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.

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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.

SIZE MATTERS

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%, pure bred, 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 ELIMINATOR

The Stumpjumper EVO comes shod with a versatile Eliminator/Butcher tire combo. The rear Eliminator features our T7 compound, bringing durability, toughness and precise feel to this aggressive, fast-rolling tire. Up front, the Butcher in our uniquely crafted T9 compound offers surefooted traction, rebound control and small bump damping. It’s like being Velcroed to the trail.

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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 just 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 EVO or enjoying a post-ride beverage around the fire pit.

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AMBUSH WITH ANGI

The new Stumpjumper EVO 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.

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TRAIL-SERIES THERMAL GLOVES

Don’t let chilly weather stop you from hitting the right lines on your Stumpjumper EVO 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.

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