Specialized S-Works Tarmac SL8 Frameset





The S-Works Tarmac SL8 is the fastest Specialized race bike frame ever made, offering a perfect balance of aerodynamics, stiffness, and compliance. With a featherweight 685g frame, it’s 15% lighter than its predecessor while improving power transfer and comfort, making it a dream foundation for any high-performance road build.
Key Features:
- FACT 12r Carbon frame – Rider First Engineered™ for superior stiffness-to-weight ratio
- Clean cable routing – Optimised for seamless integration and electronic groupset compatibility
- S-Works FACT 12r Carbon fork – Precise handling with a 12x100mm thru-axle
- 32mm tyre clearance – Allows for larger tyres and comfort on varied road surfaces
- Threaded bottom bracket – 68mm BSA for easy maintenance and creak-free performance
- Flat mount disc brake compatible – Reliable stopping power for high-speed descents and technical corners
- S-Works Tarmac SL8 Carbon seat post – Aerodynamic and tuned for compliance
- Headset compatible with SL7 Stem & Roval Rapide Cockpit – Sleek and aerodynamic cockpit integration
- Available with 0% APR finance – Build your dream race bike with flexible payment options
Tarmac SL8 is all about real-world speed. Specialized’s Ride Science team used race simulations and wind tunnel testing to create the most aerodynamic road frame to date. With the new Speed Sniffer nose cone, the head tube’s leading edge is sharper and more streamlined, reducing drag significantly. The seat post has also been optimised to channel airflow cleanly, making it more aero than even the Specialized Venge. This results in a bike that is 16.6 seconds faster over 40km and saves precious time in key race situations.
Drawing from the ultra-lightweight Aethos, the SL8 frame weighs just 685g, making it the lightest in its class. The redesigned down tube, seat tube, and rear triangle efficiently distribute loads, allowing for a 33% improvement in stiffness-to-weight ratio. This means explosive acceleration, razor-sharp handling, and efficient power transfer while maintaining an ultra-responsive ride quality.
Speed isn’t just about stiffness and aerodynamics, it’s about staying fresh deep into a race. The Tarmac SL8 introduces a 6% increase in compliance over the SL7, absorbing road vibrations while retaining the race-ready precision needed for aggressive riding. The Rider-First Engineering™ approach ensures every frame size offers the same refined balance of stiffness and comfort, so all riders experience the same high-performance feel.
S-Works Tarmac SL8 Frameset is more than just a frame it’s the ultimate platform for building a race-dominating machine. With flat mount disc brake compatibility, 12x142mm thru-axle spacing, and a seamless cockpit integration, it’s designed for modern racing standards. Whether climbing legendary cols, hammering on the flats, or sprinting for victory, this frame delivers a ride that goes like hell and feels like heaven.
Occasionally, without notice, manufacturers change product design and/or specifications.
Specialized Tarmac SL8 Frame 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 SL8 Frame 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 |
All measurements are in mm unless otherwise stated.
Customer reviews and Q&A's are disabled because you declined functional cookies.
To enable reviews and Q&A's click the 'Cookie Settings' button below and enable functional cookies.
Specialized S-Works Tarmac SL8 Frameset
Cycle to Work is a salary sacrifice scheme, where you can save up to 42% off a new Bike and Safety equipment. This means the cost is deducted from your salary as a non-cash benefit, so you save on tax and national insurance.
Here at Tredz, we accept Cycle to Work vouchers from all national schemes. For more information click here.
We understand that the Cycle to Work process can be a little slower than we would all like - so to help you pick the perfect ride, we're now offering FREE Cycle to Work Reservations (T&C's apply). Simply speak to a member of our Online Bike Experts Team via Live Chat to discuss your reservation. Find out more here.
At Tredz we make finance easy. You can choose from a range of flexible finance repayments from 6 months up to 48 months, choose to place a deposit and pay the balance on finance. Go with a 0% APR finance deal with absolutely no interest on payments, or a 9.9% APR Buy Now Pay later option with a choice of 12 or 24 deferred payment options, or a longer-term 14.9% APR option with lower monthly payments. For more information click here.
At Tredz, we’re committed to bringing you the best products at the best prices. If you find a product cheaper elsewhere, simply contact us for an immediate response using our live chat service. Click here to discuss your price match with an agent now for help.
Subject to Terms and Conditions
At Tredz, we offer a fast high quality service, with a range of options from free delivery on orders over £30, next day and convenient click & collect from one of our stores. Simply select within the checkout.
*Courier deliveries to Northern Ireland, Isle of Man, Isle of Wight, Channel Islands and the Scottish Highlands/Islands will incur a charge.At Tredz, if you are not 100% happy with your order, then you can use our simple hassle free returns service. Simply return the item new and unused in the manufacturers original packaging within 365 days of purchase. Bikes and larger items are collected by courier.
When you receive your bike, all you'll need to do is unpack it, attach the pedals, turn the handlebars and ride.
To help you get started we have put together a handy Bike Building Guide, click here.