2025 Specialized S-Works LTD Tarmac SL8 SRAM RED AXS Features
Nothing is faster than the Tarmac SL8 with its perfect combination of aerodynamics, lightweight, and ride quality previously thought impossible. After eight generations and over two decades of development, it’s more than the fastest Tarmac eve—it’s the world’s fastest race bike, and now it’s available in a gorgeous, limited color with all-new SRAM RED AXS and a host of unique features.
Aerodynamics or lightweight alone don’t win races—speed is what matters. Delivering that speed requires creating an uncompromising combination of aerodynamics, lightweight, stiffness, and compliance. Through race simulations using real-world data, our Ride Science team knows the Tarmac SL8 is the fastest race bike ever made on the routes that matter—16.6 seconds faster over 40km, 128 seconds faster over Milan San Remo, 20 seconds faster over the legendary Col du Tourmalet climb.
To celebrate the launch of the lightest disc brake group ever, this S-Works Tarmac SL8 comes in a gorgeous, limited Glacial Metallic color with all-new SRAM RED AXS, custom Roval graphics, silver accents, and the new Hammerhead Karoo 3 cycling computer. With only 300 worldwide, each individually numbered, they’ll go faster than Demi chasing Tour glory, so don’t wait.
At a Glance
- AERO IN EVERYTHING: We’re putting aero where it matters - the leading edge - not just where it looks good. In the process, we’ve created our most aerodynamic road bike ever. Yes, it’s more aero than the Venge. Clean air is optimized for maximum advantage with the Tarmac’s new nose cone, the Speed Sniffer. By moving the steer tube back - the tube that determines head tube width - the leading edge of the head tube can be much sharper, delivering a much lower drag shape. Utilizing new UCI rules, the Tarmac SL8 has the narrowest, most aero seat post we’ve ever made, ensuring fast-moving, dirty air around the legs can flow back more cleanly. Doesn’t victory smell sweet?
- MINIMUM WEIGHT, MAXIMUM AERO: Tarmac SL8 took learnings from Aethos to be easily built at the UCI minimum with a full aero setup. The team delivered a mind-bending, scale-tickling 685-gram frame—15% lighter than the Tarmac SL7 and lighter than anything else on the World Tour*. With the ability to make lightweight a top priority in the down tube, seat tube, and rear of the bike, lessons from Aethos were applied. The frame’s shape carries load so efficiently that extra carbon stiffness layers become redundant. *Unless, of course, you count the time Kasper Asgreen raced our 585-gram Aethos frame during a Tour stage.
- GOES LIKE HELL, RIDES LIKE HEAVEN: With massive gains in stiffness-to-weight - an improvement of 33% over the SL7 - the Tarmac SL8 takes legendary handling, aggressive responsiveness, and World Championship-proven geometry to the next level. The bike is stiffer at the pedals, more precise at the bars, and combines it with a compliant ride in the saddle that sets a new benchmark for race bike comfort. Thanks to our Rider-First Engineering, every rider gets the same unprecedented ride quality and handling regardless of size. In the saddle, the Tarmac SL8 delivers 6% more compliance, floating over rough roads with a supple feel unique in the high-strung world of race bikes. Tarmac’s proven geometry and 32mm tire clearance are identical to the SL7, ensuring easy adaptation and the versatility to run higher volume tires when needed.
- BEYOND GENDER: There can be more differences between two male cyclists than between a male and female. Gender alone doesn’t provide nearly enough data to specialize, and that means creating male or female bikes is arbitrary and outdated. Every rider can get the next-level advantage of Tarmac SL8. It’s time to go Beyond Gender.
- S-Works Tarmac SL8 is spec’d with only the best components. A SRAM RED AXS groupset with power meter, and a Roval Rapide CLX II tubeless-ready wheelset is the perfect complement to the world’s fastest frame. All S-Works Tarmac SL8 models ship with a Roval Rapide cockpit to save weight and for the fastest possible leading edge.
Component Specifications
| Frame | S-Works Tarmac SL8 FACT 12r Carbon, Rider First Engineered™, Win Tunnel Engineered, Clean Routing, Threaded BB, 12x142mm thru-axle, flat-mount disc |
| Seat Binder | Tarmac Integrated Wedge |
| Fork | S-Works FACT 12r Carbon, 12x100mm thru-axle, flat-mount disc |
| Shift Levers | NEW SRAM RED AXS, hydraulic disc |
| Front Derailleur | NEW SRAM RED AXS, braze-on |
| Rear Derailleur | NEW SRAM RED AXS, 12-speed |
| Cassette | NEW SRAM RED XG-1290, 12-speed, 10-33t |
| Chain | NEW SRAM RED 12-speed |
| Crankset | NEW SRAM RED AXS Power Meter |
| Chain Rings | 48/35 |
| Bottom Bracket | SRAM DUB BSA 68 |
| Front Tire | S-works Turbo Rapidair 2BR, 700x26mm |
| Rear Tire | S-works Turbo Rapidair 2BR, 700x26mm |
| Inner Tubes | Turbo Ultralight, 60mm Front, 80mm Rear, Presta valve |
| Front Brake | NEW SRAM RED AXS, hydraulic disc 160mm rotor |
| Rear Brake | NEW SRAM RED AXS, hydraulic disc 160mm rotor |
| Stem | Roval Rapide Cockpit, Integrated Bar/Stem |
| Handlebars | Roval Rapide Cockpit, Integrated Bar/Stem |
| Saddle | S-Works Power with Mirror |
| Seatpost | S-Works Tarmac SL8 Carbon seat post, FACT Carbon, 15mm offset |
2025 Specialized S-Works LTD Tarmac SL8 SRAM RED AXS
| Bike/Frame Size | 44 | 49 | 52 | 54 | 56 | 58 | 61 |
|---|---|---|---|---|---|---|---|
| Frame Stack | 501 mm | 514 mm | 527 mm | 544 mm | 565 mm | 591 mm | 612 mm |
| Frame Reach | 366 mm | 375 mm | 380 mm | 384 mm | 395 mm | 402 mm | 408 mm |
| Fork Rake/Offset | 47 mm | 47 mm | 47 mm | 44 mm | 44 mm | 44 mm | 44 mm |
| Front Center | 572 mm | 574 mm | 577 mm | 579 mm | 592 mm | 606 mm | 613 mm |
| Chainstay Length | 410 mm | 410 mm | 410 mm | 410 mm | 410 mm | 410 mm | 410 mm |
| Wheelbase | 970 mm | 973 mm | 975 mm | 978 mm | 991 mm | 1006 mm | 1013 mm |
| Top Tube Length, Horizontal | 496 mm | 509 mm | 531 mm | 541 mm | 563 mm | 577 mm | 595 mm |
| Bike Standover Height | 723 mm | 735 mm | 746 mm | 768 mm | 786 mm | 808 mm | 834 mm |
| Seat Tube Length | 433 mm | 445 mm | 456 mm | 473 mm | 494 mm | 515 mm | 545 mm |
| Seat Tube Angle | 75.5° | 75.5° | 74° | 74° | 73.5° | 73.5° | 73° |
| Stack to Stem | 509 mm | 522 mm | 535 mm | 552 mm | 573 mm | 599 mm | 620 mm |
| Reach to Stem | 363 mm | 372 mm | 377 mm | 381 mm | 393 mm | 400 mm | 406 mm |
| Head Tube Length | 99 mm | 109 mm | 120 mm | 137 mm | 157 mm | 184 mm | 204 mm |
| Head Tube Angle | 70.5° | 71.75° | 72.5° | 73° | 73.5° | 73.5° | 74° |
| BB Height | 266 mm | 266 mm | 266 mm | 268 mm | 268 mm | 268 mm | 268 mm |
| BB Drop | 74 mm | 74 mm | 74 mm | 72 mm | 72 mm | 72 mm | 72 mm |
| Trail | 71 mm | 63 mm | 58 mm | 58 mm | 55 mm | 55 mm | 52 mm |
| Fork Length, Full | 370 mm | 370 mm | 370 mm | 370 mm | 370 mm | 370 mm | 370 mm |
Size Guide: 2025 Specialized S-Works LTD Tarmac SL8 SRAM RED AXS
