Most aero, lightweight Crux ever with unparalleled ride.

Specialized has unveiled the all-new S-Works Crux 5, billed as the fastest gravel race bike ever made—measured not by lab numbers alone, but by Time to Finish. Engineered around the Equation of Speed and validated against the brutal Unbound course, Crux 5 saves up to 9 minutes and 58 seconds versus its predecessor.

It's the most aerodynamic Crux yet, delivering 15.2 watts of savings at 45 kph thanks to Tarmac SL8-inspired tube shapes refined in the Win Tunnel with the sixth-generation Moving Leg Mannequin. At just 789 grams for the frame and 6.9 kg complete, nothing is lighter. Race-tuned progressive geometry, 55mm tire clearance, and Crux 4-matched compliance deliver telepathic handling and all-day comfort. To the competition, Crux 5 has one message: Eat My Dust.

Checkout the Specialized Crux 5 lineup

Get riders to the finish line faster than any gravel bike in the world

That was the brutally simple mission behind the all-new S-Works Crux 5, and Specialized's Science Club delivered. Rather than chase isolated lab numbers, engineers built the most comprehensive gravel race simulation system ever created, optimizing every variable around a single metric: Time to Finish.

The result is staggering. Over the punishing 2025 Unbound course, Crux 5 would shave 9 minutes and 58 seconds from a rider's finish time versus Crux 4—purely through equipment efficiency. That gain comes from 15.2 watts of aero savings, a class-leading 789-gram frame, 6.9 kg complete builds, and race-day telemetry capturing real gravel surface roughness.
Aero, light, and uncompromising in ride quality, Crux 5 has one message for rivals: Eat My Dust.

Need to Know: Crux Model Features and Details

• Fastest gravel race bike ever made, engineered around a single metric: Time to Finish
• 15.2 watts faster than Crux 4 at 45 kph, validated in the Win Tunnel with the sixth-generation Moving Leg Mannequin
• 9 minutes, 58 seconds faster over the 2025 Unbound course versus Crux 4
• 789-gram S-Works FACT 12r frame, the lightest in the gravel race category
• Complete builds from 6.9 kg, with full aero setups at just 7.1 kg
• Flow State Design, first pioneered on Aethos, optimizes tube shape over material for lighter, stronger frames
• 55mm (2.2") tire clearance with no compromise to weight, handling, or rolling resistance
• Race-tuned progressive geometry: longer reach, 0.5° slacker head angle, lower BB, 0.5° steeper seat angle
• Matches Crux 4's exact compliance and stiffness targets while adding aero performance
• Rider-First Engineered across sizes 49–61cm with size-specific layups
• Race-day telemetry packs captured real gravel surface roughness at events like the 2025 Unbound
• Aero gains breakdown: 50% frame/fork/seatpost, 30% Roval Terra Aero wheels, 20% Roval Terra cockpit
• S-Works Crux 5 features FACT 12r frame, Terra Aero CLX wheels, and SRAM RED AXS XPLR groupset
• Crux 5 S-Level uses FACT 10r carbon at 897 grams, complete builds at 7.7 kg with SRAM RED XPLR
• Crux 5 Expert brings race DNA to more riders with FACT 10r frame, Terra C III wheels, and SRAM FORCE AXS XPLR