Name: Specialized Crux 5 Sport – Shimano GRX
Brand: Specialized
SKU: 91427-6149
Price: 3249.0 GBP
Availability: OutOfStock

Specialized Crux 5 Sport gravel race bike in Silver Pearl Smoke/Silver Dust, view 1

Specialized Crux 5 Sport gravel race bike in Silver Pearl Smoke/Silver Dust, view 2

Specialized Crux 5 Sport gravel race bike in Silver Pearl Smoke/Silver Dust, view 3

£3,249.00

This bike is available through the Cycle to Work Scheme

Unsure of your size?

Book a sizing appointment in our bike fit studio and get the right fit.

The Crux 5 is the fastest gravel race bike Specialized has ever made. It's light and aero, it handles loose ground the way a Tarmac handles the road, and above all it delivers the lowest real-world Time to Finish of any gravel bike Specialized has tested.

The Sport build puts the same 897g FACT 10r carbon frame within reach, with dependable Shimano GRX 12-speed mechanical shifting, DT Swiss G500 wheels and 45mm Pathfinder tubeless-ready tyres. It weighs 8.94kg (size 56) and has room for 55mm tyres.

Highlights

Crux 5 FACT 10r carbon frame, 897g, Rider-First Engineered
Shimano GRX 1x12 mechanical with 10-45t cassette
DT Swiss G500 tubeless-ready wheels with 45mm Pathfinder tyres
Roval Rapide stem with Specialized Adventure Gear flared bar
Clearance for 55mm tyres
8.94kg, size 56

Sizes and fit

Available in 49cm, 52cm, 54cm, 56cm, 58cm and 61cm.

Colours

Silver Pearl Smoke / Silver Dust.

Frameset

Frame: Crux 5 FACT 10r Carbon, Rider First Engineered, threaded BB, 12x142mm thru-axle, flat-mount disc, UDH dropout
Fork: S-Works FACT Carbon, 12x100mm thru-axle, flat-mount disc

Drivetrain

Shift levers: Shimano GRX ST-RX820
Rear derailleur: Shimano GRX RD-RX822-GS, 12-speed
Cassette: Shimano XT CS-M8100, 12-speed, 10-45t
Chain: Shimano XT CN-M8100, 12-speed
Crankset: Shimano GRX FC-RX820, 40t
Bottom bracket: Shimano threaded BSA
Brakes: Shimano GRX BR-RX820, hydraulic disc

Wheels and tyres

Wheels: DT Swiss G500 rim, 26mm internal width, tubeless ready, 24h, Specialized fully sealed bearing thru-axle hub, centrelock disc, DT Swiss Champion stainless steel spokes
Tyres: Pathfinder, 700x45, tubeless ready
Inner tubes: 700x32-50mm, 40mm Presta valve

Cockpit and contact points

Stem: Roval Rapide, alloy, 4 bolt, -6 degrees
Handlebars: Specialized Adventure Gear, 118.9mm drop, 70mm reach, 12° flare
Bar tape: Supacaz Super Sticky Kush
Saddle: Body Geometry Power Sport, steel rails
Seatpost: S-Works Tarmac SL8 Carbon, FACT Carbon, 15mm offset
Seat binder: Integrated wedge

Weight

Weight: 8.94kg (size 56)

Free UK shipping available on all orders, excluding bikes, wheelsets and packages over 10kg in weight e.g. turbo trainers.

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Time to Finish

Crux 5 was developed around a single question: does it get you to the finish line faster on the hardest gravel courses on Earth? To answer it, Specialized built the most comprehensive gravel race simulations it has ever run.

The result: Crux 5 is up to 9 minutes 58 seconds faster over Unbound than Crux 4 (based on Sofía Gómez Villafañe's 2025 race, with the same course, conditions and rider input).

Specialized Crux 5 – most aerodynamic Crux yet

The Most Aerodynamic Crux Yet

Crux 5 is the most aerodynamic gravel race bike Specialized has ever made, saving 15.2 watts.

Drawing on lessons from the Tarmac SL8 and decades of aero research, every tube was sculpted for the speeds of elite gravel racing.

Riders racing Specialized Crux 5 bikes on gravel

Speed Everywhere, All Day

Speed isn't only about peak numbers – it's about holding power and momentum deep into a race. Crux 5 combines telepathic handling and instant acceleration with balanced compliance that reduces fatigue on rough courses.

Rider-First Engineered and now with 55mm tyre clearance, it keeps the legendary ride feel of Crux 4 while adding real aero performance.

Specialized Crux 5 Comp FACT 10r carbon frame detail

Race-Proven FACT 10r Carbon

Every Crux 5 is built around a FACT 10r carbon frame weighing just 897g, with the same aero shaping, geometry and Rider-First Engineered handling as the S-Works.

Add a threaded bottom bracket, UDH dropout and room for 55mm tyres, and you have a race bike that's easy to live with every day.