Specialized S-Works Crux in review – In Our 2025 Gravel Race Bike Comparison Test.

With its featherlight 7.22 kg build, the Specialized S-Works Crux was once the benchmark in the gravel race segment. But since its launch in 2022, the scene has moved on – and in 2025, aero machines with greater tire clearance are setting new standards. Can the Crux still keep up with the competitionor is it time to pass on the crown?

With the S-Works Crux, Specialized took home the coveted Best Buy recommendation in our latest gravel race comparison test – and in 2025, it’s still the lightest bike in the entire test field. But the competition has stepped up: aero frames, deeper rims, and increased tire clearance are now redefining the benchmark. Is a low system weight alone still enough to stay at the front of the pack?

To keep up with the times, Specialized enter this test with a custom race version of the S-Works Crux, which relies on road-specific components like an aero cockpit and deep-section wheels borrowed straight from the Specialized S-Works Tarmac SL8. The goal is clear: optimised aerodynamics to stay competitive with today’s aero-focused gravel bikes. Our test reveals whether this really is the perfect fusion for modern gravel racing, and whether the Crux can once again earn our Best Buy recommendation.

The crux of weight: Is less still enough?

One thing becomes clear straight away: the Crux stays true to itself. No new model, no aero revolution – just classic round tubing reminiscent of the Aethos. While many brands are chasing minimal drag, the slender frame of the Crux almost feels nostalgic. No D-shaped seatpost, no dropped seatstays, no hidden storage – the Crux is a purist’s machine, bordering on old-school.

But what might look outdated at first glance is more than made up for by its ultra-lightweight design. At just 7.22 kg, it’s the lightest bike in this test and, for once, not the most expensive one. However, at € 13,210, it still sits firmly in the high-end segment of the gravel racer category, only topped by Falkenjagd’s exotic titanium steed.

The only subtle detail is the low-key S-Works branding – because the chunky Roval Rapide CLX II carbon wheels are anything but understated. Originally developed for the Tarmac, these were added to our test bike specifically to ensure a more aerodynamic edge in a racing context. A bold move, since compared to the stock Terra CL gravel wheels, the Rapide set is not only heavier but also noticeably less off-road-oriented. That said, they’re designed to shine on tarmac and hardpack thanks to their improved aero performance.

All out S-Works: The spec on the Specialized S-Works Crux

Lowest system weight possible, uncompromising race-focus: the Crux skips aerodynamic frame gimmicks in favour of an all-in high-end build. The SRAM RED XPLR AXS groupset with power meter delivers precise gear shifts, while the compact 40T chainring gives the Crux the lowest gearing in the test field – every gram counts 😉

The Roval Rapide wheels combine a 50 mm rim at the front, and a 62 mm rim at the rear, going all-in on aerodynamics. This setup brings serious speed on tarmac and hardpack – but on rough gravel, the narrow 21 mm internal rim width becomes noticeable. The 42 mm Specialized S-Works Pathfinder tire balloons outwards, reducing the contact surface and noticeably limiting grip in corners and on loose terrain.

While the tires impressed with exceptionally low rolling resistance in our gravel tire comparison test, that came at a clear cost to traction and control. That said, the frame has plenty of clearance, accepting tires up to 47 mm wide. That’s more than the Canyon Grail CFR XPLR allows for, keeping the Crux competitive for nearly any race scenario in 2025.

In keeping with the aero theme, Specialized fitted a Roval Rapide cockpit from their own road range. At 42 cm wide, it promises solid control and has previously impressed with its comfortable ergonomics. In practice, however, the setup feels less aggressive than on rivals like the Trek and Parapera – and that’s not just down to the lack of flare in the drops, which would improve stability on rough descents.

Visually, the deep-section rims and one-piece aero cockpit give the Crux’s classic round frame a modern edge – but fans of that old-school aesthetic might find the contrast jarring. And while 42 cm might sound narrow, it’s now almost conservative: modern gravel race cockpits are trending towards even narrower widths with pronounced flare – something the Crux setup notably lacks.

The geometry of the Specialized S-Works Crux

In terms of geometry, the Crux clearly positions itself on the sporty end of the test field. The 1.46 stack-to-reach ratio enables a stretched, aggressive riding position. The steep 72° head angle reflects the bike’s cyclocross roots and promises sharp, agile handling. With its 425 mm chainstays, the Crux falls right in line with the test field average.

Size	49	52	54	56	58	61
Seat Tube	466 mm	496 mm	521 mm	546 mm	576 mm	606 mm
Top Tube	512 mm	539 mm	549 mm	568 mm	582 mm	599 mm
Head Tube	100 mm	115 mm	130 mm	145 mm	170 mm	190 mm
Head Angle	70.5°	71.5°	71.5°	72°	72.5°	72.5°
Seat Angle	75.5°	74°	74°	73.5°	73.5°	73.5°
Chainstay	425 mm	425 mm	425 mm	425 mm	425 mm	425 mm
BB Drop	74 mm	74 mm	72 mm	72 mm	72 mm	72 mm
Wheelbase	1008 mm	1014 mm	1023 mm	1033 mm	1045 mm	1059 mm
Reach	375 mm	382 mm	388 mm	397 mm	405 mm	415 mm
Stack	530 mm	547 mm	560 mm	578 mm	598 mm	621 mm

Cross DNA with gravel credentials: The Specialized S-Works Crux on test

Just a few metres in, it becomes clear that the Specialized S-Works Crux is all about pure speed and riding fun. With its minimalist design, stiff frame, and ultra-low weight, the Crux is one of the most responsive bikes in this test. Steering input is implemented with great precision, and, together with the razor-sharp handling, ensures an agile character in tight corners and technical sections. Only the exceptionally playful SCOTT Addict Gravel RC is more nimble.

At 7.22 kg, the Crux feels almost unfairly light on the climbs.

However, extreme agility often comes at the expense of composure, and the Crux is no exception, requiring a steady hand and a precise line choice on rough descents. In a nutshell, it’s very sensitive to input and doesn’t track as confidently as gravel “monster trucks” like the Cannondale SuperX and the 3T RaceMax Italia. That said, it still feels more stable than twitchier all-road machines like the Superior and Parapera, and it always delivers a direct, intuitive ridecarving through corners with surgical precision – a proper race bike feel that’s both sharp and controlled.

Where the Crux really shines is in acceleration. Few bikes in this test respond as effortlessly to rider’s input, converting every pedal stroke into forward motion with stunning efficiency. On short, steep climbs, it feels almost unfairly light, rocketing to the front with ease – this is where its ultra-lightweight DNA truly kicks in. Even the featherweight Parapera Anemos² struggles to match its snap. On level ground, it holds speed confidently, though it isn’t quite as explosively punchy as the ROSE BACKROAD FF, which delivers even more pop with its stiff frame and aggressive setup.

Beyond all that performance, the Crux also delivers a massive fun factor. With its light frame, precise handling, and playful character, it’s a bike that wants to be ridden actively – not just cruised. That said, it’s no laid-back long-distance cruiser. The frame is firm and doesn’t smooth out all the bumps when the terrain gets rough. Much of the comfort comes from the components.

The Roval Alpinist seatpost, the plush S-Works Power Mirror saddle, the Roval cockpit and Pathfinder tires all add noticeable damping, making the Crux much more comfortable than its stiff frame might suggest. It’s not quite as cushy as the Trek Checkmate SLR, but it’s far gentler than the rock-hard ROSE BACKROAD FF. With a generous tire clearance of up to 47 mm, there’s also plenty of room to add grip and compliance – a clear advantage over the Canyon Grail CFR XPLR, which maxes out at 42 mm at the rear. To unlock its full potential, fitting wider rims and more aggressive tires could make the Crux noticeably more off-road capable.

Tuning tip: Narrower cockpit with flare for improved aerodynamics and control.

What kind of races is the Specialized S-Works Crux made for?

The S-Works Crux is the ultimate choice for races with lots of elevation gain – on steep climbs, the minimal system weight plays all the right cards, leaving much of the competition behind in a cloud of dust. It shines above all in short, punchy races with frequent direction changes, where the direct, agile handling truly comes into its own.

It’s less composed on long, fast descents and in rough terrain, where bikes like the 3T RaceMax or Cannondale SuperX feel far more composed, inspiring greater confidence in the process.

But if you’re after a nimble, ultra-responsive gravel race bike with CX roots and a high fun factor, the Crux is a pure, precise racing tool. The 47 mm tire clearance is above average in this test field, and gives the Specialized valuable reserves in comfort, control, and grip for more demanding race conditions.

Conclusions about the Specialized S-Works Crux

The Specialized S-Works Crux is an ultra-light, razor-sharp gravel race bike with strong cyclocross DNA and incredibly precise handling. The low system weight and agile character make it the go-to choice for steep climbs and tight, technical courses. Overall, the Crux demands an active riding style, but rewards your efforts with unmatched responsiveness and maximum fun. However, if you’re looking for a more composed, fully-equipped bike for high-speed descents and long-distance comfort, options like the Canyon Grail are a better fit.

More info at specialized.com.

The test field

This bike was tested as part of the 2025 Race Gravel Bike comparison test – you can find an overview of this group test and all other tested race gravel bikes here:

All bikes in review: 3T Extrema Italia | Cannondale SuperX 2 | Canyon Grail CFR XPLR | Falkenjagd Aristos SL | Merida Silex 8000 | Parapera Anemos² | Rose Backroad FF RED XPLR AXS | Scott Addict Gravel RC | Superior XR 9.7 GF | Specialized S-Works Crux | Trek Checkmate SLR 9 AXS | Wilier Rave SLR

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Words: Jan Fock Photos: Jan Richter