Crux 5 S-Level
Crux 5 S-Level
Crux 5 S-Level
Crux 5 S-Level
Crux 5 S-Level
Crux 5 S-Level
Crux 5 S-Level
Crux 5 S-Level
Crux 5 S-Level
Crux 5 S-Level
Crux 5 S-Level
Crux 5 S-Level
Specialized

Crux 5 S-Level

UPC: 196625298851
Colour — Redwood Metallic/White
Size
Size chart
 Size  Rider Height
 49  

155 - 158 cm

5'1" - 5'4"
52  

163 - 168 cm

5'4" - 5'6"
 54  

168 - 175 cm

5'6" - 5'9"
 56  

175 - 183 cm

5'9" - 6'0"
 58  

183 - 191 cm

6'0" - 6'3"
 61  

191 - 198 cm

6'3" - 6'6"


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Pairs well with
Frame:
Crux FACT 10r Carbon
Fork:
S-Works FACT Carbon
Tires:
Pathfinder 700x45, Tubeless Ready
Wheels:
Roval Terra Aero CL
Rear Derailleur:
SRAM RED AXS XPLR E1, 13-speed
Brakes:
SRAM RED E1, hydraulic disc
Saddle:
Power Pro Mirror, Hollow Ti rails
Stem / Handlebar:
Roval Terra Cockpit, Integrated Bar/Stem
Tire Clearance:
700x 55
Sizes:
49, 52, 54, 56, 58, 61
Weight (lbs/kg):
16lb 15.6 oz / 7.7 kg SZ: 56
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The Crux 5 S-Level was born from the fastest gravel race bike ever made.

Not just because it’s the lightest. Not just because it’s our most aero. Not just because it handles dirt like a Tarmac handles pavement. But because it delivers the lowest real-world Time to Finish of any gravel bike ever made.

Crux 5 turns more of your effort into pure speed—validated across real race courses, real terrain, and real riders. When the goal is the top step, nothing in gravel gets you there faster.

  • Time to Finish: When the objective is winning races, the goal is brutally simple. Get riders to the finish line faster. For Crux 5, that meant answering one question. Does this bike reduce total race time on the fastest, hardest gravel course on Earth? To answer that, Specialized build the most comprehensive gravel race simulations ever created. The result? Crux 5 is up to 9:58* faster over Unbound (Time savings for Sofía Gómez Villafañe vs Crux 4, assuming same course conditions, and rider input as 2025 Unbound)
  • 15.2 Watts Faster: The Crux 5 is the most aerodynamic gravel race bike Specialized has ever made. Drawing directly from Tarmac SL8 learnings, and decades of aero research, every tube on Crux 5 was sculpted for speed at elite gravel race speeds.

Frameset

  • Frame: Crux 5 FACT 10r Carbon, Rider First Engineered, Threaded BB, 12x142mm thru-axle, flat-mount disc, UDH dropout

Suspension

  • Fork: S-Works FACT Carbon, 12x100mm thru-axle, flat-mount disc

Brakes

  • Front Brake: SRAM RED E1, hydraulic disc
  • Rear Brake: SRAM RED E1, hydraulic disc

Drivetrain

  • Bottom Bracket: SRAM DUB BSA 68 Wide
  • Shift Levers: SRAM RED AXS E1, hydraulic disc
  • Rear Derailleur: SRAM RED AXS XPLR E1, 13-speed
  • Chain: SRAM RED E1
  • Cassette: SRAM RED XPLR E1, 13-speed, 10-46t
  • Crankset: SRAM RED XPLR E1, Quarq power meter, 40t

Wheels & tires

  • Inner Tubes: 700x32-50mm, 60mm Presta valve
  • Front Wheel: Roval Terra Aero CL, 27mm internal width, tubeless ready, 50mm depth, 21h, DT 350 hub, Centerlock disc, DT Swiss Competition spokes
  • Rear Wheel: Roval Terra Aero CL, 27mm internal width, tubeless ready, 45mm depth, 24h, DT 350 hub, Centerlock disc, DT Swiss Competition spokes
  • Front Tire: Pathfinder 700x45, Tubeless Ready
  • Rear Tire: Pathfinder 700x45, Tubeless Ready

Cockpit

  • Stem: Included in Handlebar
  • SeatPost: S-Works Tarmac SL8 Carbon seat post, FACT Carbon, 15mm offset
  • Saddle: Power Pro Mirror, Hollow Ti rails
  • Handlebars: Roval Terra Cockpit, Integrated Bar/Stem
  • Tape: Supacaz Super Sticky Kush
  • Seat Binder: Integrated Wedge

Weight

  • Weight Size: 56
  • Weight: 7.7 kg (16 lb, 15.6 oz)

9:58 Faster Over Unbound

So what happens when we run the Equation of Speed with:

  • 15.2 watts less aerodynamic drag
  • A 789 gram frame (56cm S-Works)
  • 6.9 kg system weight
  • Hyper-accurate surface telemetry
  • Elite rider power profiles

9:58 saved.

Racing the 2025 Unbound on a 2026 Crux 5 would save Sofía Gómez Villafañe over 9:58—purely through equipment efficiency.

This level of simulation may be unique in cycling, but not in other elite sport. Both Formula 1 and America’s Cup sailing utilize simulation extensively to benchmark and refine performance. Hyper-accurate simulation has been one of the key reasons both of these sports have seen such massive leaps in performance.

A System of Speed

Drawing directly from Tarmac SL8 learnings and decades of aero research, every tube on Crux 5 was sculpted for speed at elite gravel race speeds.

Aero Gains Breakdown:

  • Frame, fork & seatpost: 50%
  • Roval Terra Aero wheels: 30%
  • Roval Terra cockpit: 20%

*15.2 watts as spec’d with our Moving Leg Mannequin at 45 kph. Results may vary up or down depending on individual riders.

The Science Club at our Morgan Hill Innovation Center built mules—preliminary test prototypes that bonded parts of the Crux 4 with parts of the Tarmac SL8. From a Crux 4 with a Tarmac SL8 seat tube and seat post, to a full Tarmac SL8 rear end bonded to a Crux front triangle with a custom aero fork, the Science Club began to hybridize road-level aero gains with gravel-light weight savings.

All those aero gains were validated with the Moving Leg Mannequin, because being fast without a rider is meaningless.

Rider First Engineered

Every size from 49–61cm receives a specific layup based on performance metrics unique to that size—delivering stiffness, compliance, and handling that is consistent across all sizes—because every rider, regardless of height, deserves the same unparalleled performance. 

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