S-Works Epic Hardtail Frameset - LTD
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S-Works Epic Hardtail Frameset - LTD

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S-Works Epic Hardtail Frameset - LTD
Technical Specifications

There's not much that matches the feeling of powering up a pitch on a featherweight bike, and we designed the new S-Works Epic Hardtail frame with this in mind. It's less than 900 grams, exceptionally stiff, and it features a Rider First Engineered™ design. It's the perfect jumping off point to begin creating your dream build.

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 the head tube, and a slacked out the 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.

  • To provide the optimal blend of stiffness, crazy light weight, and strength, we constructed the frame from our S-Works FACT 12m carbon fiber. And when combined with our XC 29 Geometry, this Epic is guaranteed to deliver uncompromising, blistering speed and agile handling come race day—no matter the course.

Technical Specifications

SEAT BINDER Specialized Alloy, 30.0mm, titanium bolt
FRAME Specialized S-Works FACT 12m, XC Geometry, internal split-housing cable routing, PF30 BB, 12x148mm rear-end, triangulated post-mount 160mm brake


Geometry Chart

Epic Hardtail - Geometry

Reach 380mm 395mm 418mm 441mm 462mm
Top Tube Length, Horizontal 549mm 568mm 595mm 623mm 649mm
Stack 589mm 599mm 608mm 622mm 637mm
Wheelbase 1054mm 1073mm 1099mm 1128mm 1154mm
Chainstay Length 430mm 430mm 430mm 430mm 430mm
Front Center 631mm 650mm 676mm 705mm 731mm
BB Drop 61mm 61mm 61mm 61mm 61mm
BB Height 309mm 309mm 309mm 309mm 309mm
Head Tube Angle 69.8° 69.8° 69.8° 69.8° 69.8°
Seat Tube Length 370mm 400mm 430mm 470mm 520mm
Head Tube Length 95mm 95mm 95mm 110mm 125mm
Bike Standover Height 731mm 760mm 790mm 814mm 845mm
Fork Rake/Offset 51mm 51mm 51mm 51mm 51mm
Fork Length, Full 486mm 496mm 506mm 506mm 506mm
Trail 81.8mm 82mm 82mm 82mm 82mm