Specialized S-Works Crux 5 Frameset FACT 12r Carbon

Specialized S-Works Crux 5 carbon gravel frameset, view 1

Specialized S-Works Crux 5 carbon gravel frameset, view 2

Specialized S-Works Crux 5 carbon gravel frameset, view 3

Specialized S-Works Crux 5 carbon gravel frameset, view 4

Specialized S-Works Crux 5 carbon gravel frameset, view 5

Specialized S-Works Crux 5 carbon gravel frameset, view 6

£5,249.00

Tax included.

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.

Eat My Dust

The S-Works Crux 5 is the fastest gravel frame set 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 for real race courses, real terrain, and real riders. When the goal is the top step, nothing in gravel gets you there faster.

At a Glance

Use: Gravel Racing
Frame: FACT 12r Carbon: 789 grams
Fork: FACT 12r Carbon
Seatpost: S-Works Tarmac Seatpost
Bottom Bracket: 68mm BSA Threaded
Frame Weight: 789 grams

Technical Specifications

Frameset
Frame	S-Works Crux 5 FACT 12r 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
Cockpit
SeatPost	S-Works Tarmac SL8 Carbon seat post, FACT Carbon, 15mm offset, Lightweight Saddle Clamp
Seat Binder	Integrated Wedge

Weight: 1.63 kg (3 lb, 9.5 oz) as measured on a size 56 frame. Actual weight will vary by size and colourway.

Sizes and fit

Available in frame sizes 49, 52, 54, 56, 58 and 61.

Colours

Available in Agave Grey/Photon Tint Over Silver Dust and Cayenne Metallic/Red Tint/White Silver Metallic.

Materials and construction

Frame: S-Works Crux 5 FACT 12r Carbon, Rider First Engineered™, threaded BB, 12x142mm thru-axle, flat-mount disc, UDH dropout; stated frame weight 789 grams
Fork: S-Works FACT Carbon, 12x100mm thru-axle, flat-mount disc
Seatpost: S-Works Tarmac SL8 Carbon seat post, FACT Carbon, 15mm offset, Lightweight Saddle Clamp
Seat binder: integrated wedge
Bottom bracket: 68mm BSA threaded
Claimed weight 1.63 kg (3 lb, 9.5 oz) as measured on a size 56 frame; actual weight will vary by size and colourway
Supplied as a frameset; the components stated for it are the frame, fork, seat post and seat binder listed above
Intended use: gravel racing

Questions on size or spec? Call 01625 403803 or visit us at 48a London Road, Alderley Edge
Sized properly: book a bike fit in our Alderley Edge studio
Not in the shop? Supplier stock reaches us in 4–5 days, then we post it or it's ready to collect
30-day returns (custom builds excluded)
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Frameset

Frame: S-Works Crux 5 FACT 12r 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
Seatpost: S-Works Tarmac SL8 Carbon, FACT Carbon, 15mm offset, lightweight saddle clamp
Seat binder: Integrated wedge
Bottom bracket: 68mm BSA threaded

Weight

Frame weight: 789g (claimed)
Frameset weight: 1.63kg (size 56)

Size	49cm	52cm	54cm	56cm	58cm	61cm
Stack (mm)	530	547	560	578	598	621
Reach (mm)	375	382	388	400	412	425
Seat tube length (mm)	445	456	473	497	515	545
Top tube (effective) (mm)	512	534	543	566	583	603
Head tube length (mm)	95	110	125	142	163	188
Head tube angle (°)	70.5	70.75	71	71.5	71.5	71.5
Seat tube angle (°)	75.5	74.5	74.5	74	74	74
Chainstay length (mm)	425	425	425	425	425	425
BB drop (mm)	80	80	78	78	78	78
BB height (mm)	278	278	280	280	280	280
Wheelbase (mm)	1008	1016	1026	1039	1057	1078
Front centre (mm)	594	604	613	626	644	665
Fork length (mm)	401	401	401	401	401	401
Fork offset (mm)	51	51	51	51	51	51
Trail (mm)	72	71	69	66	66	66
Standover (mm)	753	766	781	803	823	849

Same frame geometry across S-Works (FACT 12r) and FACT 10r Crux 5 models.

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

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.

Roval Terra integrated cockpit on the Specialized Crux 5

Ready for Your Build

The frameset comes with the S-Works Tarmac SL8 carbon seatpost and integrated wedge seat binder, so you can build it up with the parts you choose.

A 68mm BSA threaded bottom bracket and UDH dropout keep it compatible with the latest drivetrains and easy to service.