Specialized Tarmac SL8 S-Works Di2 2025 - Road Bike
The Specialized Tarmac SL8 S-Works Di2 is the perfect road race machine, equipped with a full carbon FACT12r frame, Dura-Ace Di2 shifting and Roval Rapide 51mm carbon wheels.
Key Features:
- FACT 12r carbon frame, Rider-First Engineered™, race-optimised geometry
- FACT 12r carbon fork offers light weight and precise handling
- Shimano Dura-Ace Di2 12-speed groupset with integrated power meter
- Shimano Dura-Ace R9270 hydraulic disc brakes for powerful, consistent stopping
- Roval Rapide CLX II carbon wheels with S-Works Turbo Rapidair 26mm tyres
- Roval Rapide cockpit integrates bar and stem for max aero efficiency
- Available with 0% APR finance
Designed using real-world race simulations by Specialized's Ride Science team, it’s been proven to shave serious seconds off key race segments. 16.6 seconds over 40km, and over two minutes on long monuments like Milan–San Remo.
The SL8 is a masterclass in marrying aerodynamic shaping with ultra-lightweight construction. The reimagined ‘Speed Sniffer’ head tube shifts the steer tube back, allowing a sharper leading edge and narrower frontal profile to cut drag. At just 685g, the frame is 15% lighter than the SL7 and hits the UCI weight limit with a full aero setup.
Yet speed isn’t the only gain. The SL8 is 33% stiffer at the pedals and more precise at the bars, but still delivers 6% more compliance at the saddle than its predecessor. Thanks to Rider-First Engineering, this ride quality is consistent across all frame sizes.
With 32mm tyre clearance, it also accommodates modern tyre widths for greater grip and versatility. The integrated Roval Rapide cockpit reduces weight and drag, while the Roval Rapide CLX II wheels are tubeless-ready and built for WorldTour speed. A Shimano Dura-Ace Di2 12-speed groupset with integrated dual-sided power meter ensures silky-smooth shifting and precise data tracking on every ride.
Occasionally, without notice, manufacturers change product design and/or specifications.
| Frame | S-Works Tarmac SL8 FACT 12r Carbon, Rider First Engineeredâ„¢, Win Tunnel Engineered, Clean Routing, Threaded BB, 12x142mm thru-axle, flat-mount disc |
| Fork | S-Works FACT 12r Carbon, 12x100mm thru-axle, flat-mount disc |
| Stem | Roval Rapide Cockpit, Integrated Bar/Stem |
| Bars | Roval Rapide Cockpit, Integrated Bar/Stem |
| Front Brake | Shimano Dura-Ace R9270, hydraulic disc |
| Rear Brake | Shimano Dura-Ace R9270, hydraulic disc |
| Front Mech | Shimano Dura-Ace R9250, braze-on |
| Rear Mech | Shimano Dura-Ace R9250, 12-speed |
| Shifters | Shimano Dura-Ace R9270, hydraulic disc |
| Speed | 24 |
| Rims | Roval Rapide CLX II, Tubeless, 21mm internal width carbon rim, 51mm depth, Win Tunnel Engineered |
| Front Hub | Roval AFD hub |
| Rear Hub | Roval AFD hub |
| Spokes | DT Swiss Aerolite spokes |
| Front Tyre | S-works Turbo Rapidair 2BR, 700x26mm |
| Seat Post | S-Works Tarmac SL8 Carbon seat post, FACT Carbon, 15mm offset |
| Saddle | Body Geometry S-Works Power with Mirror, carbon fiber rails, carbon fiber base |
| Chainset | Shimano Dura-Ace R9200, HollowTech II, 12-speed with 4iiii Precision 3+ Pro dual-sided powermeter |
| Bottom Bracket | Shimano Dura-Ace, BB-R9200 |
| Chain | Shimano Dura-Ace, 12-speed |
| Cassette | Shimano Dura-Ace, 12-speed, 11-30t |
| Pedals | Resin Platform |
| Weight | 6.62 kg (14 lb, 9.5 oz) |
Specialized Tarmac SL8 2025 Size Chart
|
Size |
Height (cm) |
Height (inches) |
|
44 |
142 - 155 |
4’8 – 5’1” |
|
49 |
155 - 163 |
5’1 – 5’4” |
|
52 |
163 - 170 |
5’4 – 5’7” |
|
54 |
170 - 175 |
5’7 – 5’9” |
|
56 |
175 - 180 |
5’9 – 5’11” |
|
58 |
180 - 188 |
5’11 – 6’2” |
|
61 |
188 - 196 |
6’2 – 6’5” |
What size frame do I need if I am between sizes? - read here
Specialized Tarmac 2025 Geometry Chart
| Frame Size | 44 | 49 | 52 | 54 | 56 | 58 | 61 |
|---|---|---|---|---|---|---|---|
| Stack | 501 | 514 | 527 | 544 | 565 | 591 | 612 |
| Reach | 366 | 375 | 380 | 384 | 395 | 402 | 408 |
| Head Tube Length | 99 | 109 | 120 | 137 | 157 | 184 | 204 |
| Head Tube Angle (°) | 70.5 | 71.75 | 72.5 | 73 | 73.5 | 73.5 | 74 |
| Bottom Bracket Height | 266 | 266 | 266 | 268 | 268 | 268 | 268 |
| Bottom Bracket Drop | 74 | 74 | 74 | 72 | 72 | 72 | 72 |
| Trail | 71 | 63 | 58 | 58 | 55 | 55 | 52 |
| Fork Length | 370 | 370 | 370 | 370 | 370 | 370 | 370 |
| Fork Rake/Offset | 47 | 47 | 47 | 44 | 44 | 44 | 44 |
| Front Centre | 572 | 574 | 577 | 579 | 592 | 606 | 613 |
| Chainstay Length | 410 | 410 | 410 | 410 | 410 | 410 | 410 |
| Wheelbase | 970 | 973 | 975 | 978 | 991 | 1005 | 1012 |
| Top Tube Length (horizontal) | 496 | 508 | 531 | 540 | 562 | 577 | 595 |
| Standover Height | 722 | 734 | 745 | 767 | 785 | 807 | 833 |
| Seat Tube Length | 433 | 445 | 456 | 473 | 494 | 515 | 545 |
| Seat Tube Angle (°) | 75.5 | 75.5 | 74 | 74 | 73.5 | 73.5 | 73 |
| Crank Length | 165 | 165 | 170 | 172.5 | 172.5 | 175 | 175 |
| Saddle Width | 155 | 155 | 155 | 143 | 143 | 143 | 143 |
| Seatpost Length | 300 | 300 | 300 | 380 | 380 | 380 | 380 |
All measurements are in mm unless otherwise stated.
The above table shows the standard geometry for the bicycles as shipped. Other geometry configurations may be available with certain bicycles. Please contact us via Live Chat to find out more.
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Specialized Tarmac SL8 S-Works Di2 2025 - Road Bike
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