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    Men's S-Works Epic Hardtail XX1 Eagle™


    2018 Men's S-Works Epic Hardtail XX1 Eagle™

    Call it a healthy disrespect for the status quo, but we were getting bored with hardtail designs. So instead of playing along with a glued-on smile, we opted to turn the cross country world on its head with a bike that's not only the lightest mountain frame we've ever made. It's our lightest frame—period. Introducing the S-Works Epic Hardtail.

    Over the last decade, cross country racing has evolved into a completely different animal—the courses are rowdier, more technical, and overall, they're inherently different. Because of this, we realized that the best bike for the job needs to not only be lightweight and stiff, but also be able to descend and climb with equal prowess. Determining the best geometry was the easier of the two, as we took our current XC race geo and added some trail DNA to the mix. This equates to a longer top tube, a shortened head tube, and a slacked out front end, the result of which is a tremendous increase in downhill stability, plus a wider fit range. And just as importantly, this doesn't require any sacrifice of climbing proficiency. The weight aspect was more complicated, though. We were posed with the question, ""How do you take weight out of something that's already so light?"" But the answer was relatively obvious: you get the best mountain bike engineers together in one room and let the magic come out.

    Up until now, there were two ways to lighten up a frame—use less of the same grade of carbon or use less of a higher-grade carbon. Option one is never a viable solution as it sacrifices stiffness and strength, two attributes that shouldn’t be tampered with. And while we did end up using option two, we weren’t content with the amount of weight we could cut out by just using a different grade of carbon. So how else do you cut weight? Well, we began looking at our layup schedules to see if they could be improved, which shed light on a new discovery—layup inefficiencies.

    Beginning with our Rider-First Engineered™ frame technology, each size Epic Hardtail is specifically tailored to size—every carbon layup and tube are exclusively selected based upon hundreds of hours of collected ride data. What does this mean for you? It not only creates the optimal balance of rigidity, weight, and responsiveness across every frame size, but it led us to the discovery of how to save weight through the studying of the layup.

    Through extensive layup studies, we made the discovery that, by further controlling the construction and layup schedules, we could drastically decrease weight, all while maintaining the ride characteristics that you’d expect from a top-level XC race bike. With this discovery, each frame now features complex cut carbon plys that allow difficult junctions to be covered with less overlap. And while this does complicate the carbon frame puzzle by adding more pieces to the mix, it allows us to design and place them more intelligently. The result of this is a lighter frame, stronger junctions, and a drastic increase in stiffness. We then took the weight savings one step further by using Japanese military ballistic-grade carbon, which we now call 12m, to create the lightest mountain bike we've ever made. How much lighter of a frame, you ask? Less than 900 grams for a size Large frame—the same weight as a full 24oz Purist water bottle.

    For the build, the S-Works spares no expense, opting for a custom RockShox SID World Cup fork with Brain, SRAM XX1 Eagle™ 12-speed shifting, SRAM Level Ultimate hydraulic disc brakes, and hand-built Roval Control SL carbon wheels.

    Technical Specifications

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    S-Works FACT 12m, full carbon frame w/ S-Works layup, XC Geometry, internal split-housing cable routing, PF30 BB, 12x148mm rear end, triangulated post-mount 160mm brake


    Specialized Alloy 30.0mm, titanium bolt



    Custom RockShox SID World Cup w/ Brain, top-mount Brain Fade adjust, rebound adjust, Solo Air spring, tapered carbon crown/steerer, 15x110mm Maxle Stealth thru-axle, 90/100mm of travel, 51mm offset



    Roval Control SL, hookless carbon, 25mm internal width, tubeless-ready, hand-built


    Roval Control SL, sealed cartridge bearings, 15mm thru-axle, 110mm spacing, 24h


    Roval Control SL, DT Swiss Star Ratchet, 54t engagement, SRAM XD driver body, 12mm thru-axle, 148mm spacing, 28h


    DT Swiss Competition Race


    Fast Trak, GRIPTON compound, 2Bliss Ready, 29 x 2.3",


    Fast Trak, GRIPTON compound, 2Bliss Ready, 29 x 2.1"


    29x1.75/2.4", 60mm Presta valve



    SRAM XX1 Eagle™, 12-speed


    SRAM XX1 Eagle, trigger, 12-speed


    SRAM X01 Eagle, 12-speed, 10-50t


    SRAM X01 Eagle, 12-speed w/ PowerLock


    SRAM XX1 Eagle, 175/170mm crankarm, 30mm spindle


    SRAM Eagle™, alloy, 32T


    SRAM PF30



    S-Works SL, alloy, titanium bolts, 6-degree rise


    S-Works Carbon Mini Rise, 6-degree upsweep, 8-degree backsweep, 10mm rise, 720mm, 31.8mm


    Specialized Sip Grip, half-waffle, S/M: regular thickness, L/XL: XL thickness


    Body Geometry S-Works Phenom, carbon rails, 143mm


    S-Works FACT carbon, 27.2mm, 0mm setback, carbon rail clamps



    SRAM Level Ultimate, hydraulic disc, carbon lever, titanium hardware, organic pads, 160mm rotor


    SRAM Level Ultimate, hydraulic disc, carbon lever, titanium hardware, organic pads, 160/180mm rotor



    Specialized Dirt

    * Weights based on production painted frames as pictured. Actual weights will vary based on colourway, frame size, and component variation. Specifications are subject to change without notice.


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    Crank Length170mm175mm175mm175mm
    Handlebar Width720mm720mm720mm720mm
    Stem Length70mm90mm100mm110mm
    Saddle Width143mm143mm143mm143mm
    Seatpost Length350mm400mm400mm400mm
    Head Tube Length95mm95mm110mm125mm
    Head Tube Angle69.8°69.8°69.8°69.8°
    BB Height309mm309mm309mm309mm
    BB Drop61mm61mm61mm61mm
    Fork Length, Full496mm506mm506mm506mm
    Fork Rake/Offset51mm51mm51mm51mm
    Front Center650mm676mm705mm731mm
    Chainstay Length430mm430mm430mm430mm
    Top Tube Length, Horizontal568mm595mm623mm649mm
    Bike Standover Height760mm790mm814mm845mm
    Seat Tube Length400mm430mm470mm520mm
    Seat Tube Angle74°74°74°74°

    Rider Reviews

    • 4
    • 3 Reviews

    I would buy it over and over

    It is the best bike ever super light and fast



    So light it won't last

    This frame is so light it is unbelievable. I purchased the frame to race the Tour Divide this year after racing the FSR the prior year. Although the FSR came back in pristine condition despite many hours in the mud and snow, I was astonished to find a hole in one seat stay and a crack in the other at the end of the race (which Warranty will not cover). That damage was the result of 1 mile in the mud over 2700 miles of riding. If you are looking for a crazy light bike to race for a season go for it but otherwise be aware of this frame's durability.



    Wow! Everything you could want in a hardtail

    My wife and I both race cross country and marathon MTB. We bought two of these bikes last spring after selling out World Cup FSR bikes. We wanted something lighter and updated. Two weeks later my wife won the Age group Marathon MTB national championships, and I got an Age group second on a tough and technical course in Arkansas an these bikes. Two months later I got second place in the National cross country race. This bike is very light, and the new brain shock is perfect. We coulodn't be happier, and we are saving a lot of money yearly by not having to service two rear shocks and replace pivot points annually . We don't use dropper posts, but adding one would take this bike to the next level.

    Dr. J.