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Custom build your S-Works SL8 2025 frame into a bike!

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No Hassle Returns

Returns

Shop with confidence. If you've ordered the wrong size or you're not happy with a purchase it's not a problem. We want to help you find the right products to get the most out of your cycling. Simply return the item to us within 30 days in unused condition with all the packaging and we'll replace it or refund you. Kindly note that refunds can take up to 14 working days to process. *InvisiFrame kits are non-returnable/non-refundable.

We do not offer free returns because we aim to keep the cost of the product as low as possible. However, if the goods are found to be faulty, damaged or not as described, please contact us to discuss the returns process.

Call us if it's a bike as we can help arrange collection. Tel 01752 849315 or info@certini.co.uk

There is a downloadable returns form to complete and return with your goods.

Returns Address:

Certini Bicycle Company
10 Kingsmill Road
Tamar View Industrial Estate
Saltash
PL12 6LD

Under the Consumer Rights Act you have a legal right to reject goods that are of unsatisfactory quality, unfit for purpose or not as described, and get a full refund - as long as you do this quickly. This right is limited to 30 days from the date you buy your product.


CHRISTMAS RETURNS

We want to take the hassle out ofChristmasfor you so we have extended ourReturnsperiod during this time. Any products purchased between 1st December 2025 and 24th December 2025 can be returned until 18th January 2026. Please refer to ourreturnspolicy before returning your items.

Custom build your S-Works SL8 2025 frame into a bike!

Select your Frame, Wheels and Groupsets below for your dream build

Build Your Dream Bike – Custom S-Works Tarmac SL8 Builder | Shimano, SRAM, Roval, Zipp

Design your perfect ride with our Custom S-Works Tarmac SL8 Bike Builder, the ultimate online tool to personalise your road bike to your exact performance, aesthetic, and riding style preferences. Whether you're chasing podiums or riding for pure joy, this custom builder puts you in control of every detail.

Choose from premium components and world-class brands including Shimano, SRAM, Roval, and Zipp. Create your own pro-level road bike using the very latest 2025 S-Works Tarmac SL8 frame and cutting-edge technology.

Step 1: Choose Your Frame

Select your frame size and colour from our range of S-Works Tarmac SL8 paint finishes:

  • Solidity - Red To Black - White Silver
  • Carbon Rtp - Silver To Green
  • Red To Black Over Lake - Obsidian

These high-performance carbon frames offer aerodynamic excellence, lightweight handling, and race-winning pedigree.

Step 2: Select Your Groupset

Pick your preferred electronic drivetrain to match your performance goals:

  • Shimano Dura-Ace Di2 R9270 (No Power Meter)
  • Shimano Ultegra Di2 R8170 (No Power Meter)
  • SRAM Force AXS 12-Speed (No Power Meter)

Enjoy ultra-fast wireless shifting, clean integration, and unmatched efficiency from two of the world’s top drivetrain manufacturers.

Step 3: Pick Your Wheelset

Choose your carbon road wheels for aerodynamic performance, weight savings, and responsiveness:

  • Roval Rapide CLX III – Pro-level speed and aero
  • Roval Rapide CL III – Performance and value
  • Zipp 303 Firecrest – Aero, wide-rim versatility with tubeless capability
Each wheelset is hand-picked to complement the Tarmac SL8’s aggressive geometry and carbon build.

Prices quoted are with the following finishing kit:-
  • Roval Rapide Cockpit, Integrated Bar/Stem
  • S-Works Turbo, 700x28mm tyres
  • Power Pro with Mirror, titanium rails, carbon fiber base saddle
  • Supacaz Super Sticky Kush bar tape
Crank length, chainring and cassette ratios can be agreed post ordering, based on supply

Looking for More Options?

Can’t find your preferred spec, colour, or component? We offer a wider range than shown here. Contact us directly for access to additional frame finishes, power meter upgrades, bar/stem combos, or other custom touches to complete your dream road bike build.
Take a look at Custom Builds we have done before for inspiration here


Why Customise with Certini?

  • 100% genuine components and manufacturer warranties
  • Expert advice and personalised support
  • Competitive pricing on premium bike builds
  • Fully assembled and ready to ride, with optional bike fit services
Technical Information
  • Frame
    S-Works Tarmac SL8 FACT 12r Carbon, Rider First Engineered™, 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
  • Handlebars
    Roval Rapide Cockpit, Integrated Bar/Stem
  • Saddle
    Body Geometry Power Pro with Mirror, titanium rails, carbon fiber base
  • Stem
    Roval Rapide Cockpit, Integrated Bar/Stem
  • Tape
    Supacaz Super Sticky Kush
  • Seatpost
    S-Works Tarmac SL8 Carbon seat post, FACT Carbon, 15mm offset
  • Seat Binder
    Tarmac integrated wedge
  • Front Brake
    Shimano Ultegra R8170, hydraulic disc
  • Rear Brake
    Shimano Ultegra R8170, hydraulic disc
  • Shift Levers
    Shimano Ultegra R8170, hydraulic disc
  • Front Derailleur
    Shimano Ultegra R8150, braze-on
  • Rear Derailleur
    Shimano Ultegra R8150, 12-speed
  • Cassette
    Shimano Ultegra, 12-speed, 11-34t
  • Crankset
    Shimano Ultegra R8100, HollowTech II, 12-speed
  • Chainrings
    52/36T
  • Bottom Bracket
    Shimano Ultegra, BB-R60
  • Chain
    Shimano Ultegra, 12-speed
  • Front Wheel
    Roval Rapide CL II, Tubeless, 21mm internal width carbon rim, 51mm depth, Win Tunnel Engineered, 18h
  • Rear Wheel
    Roval Rapide CL II, Tubeless, 21mm internal width carbon rim, 60mm depth, Win Tunnel Engineered, 24h
  • Front Tyre
    S-Works Turbo, 700x28mm
  • Rear Tyre
    S-Works Turbo, 700x28mm
  • Inner Tubes
    Turbo, 60mm Front, 80mm Rear, Presta valve
As with any product, specification is subject to change without prior notification. You are advised to confirm current specification before buying. Please note that this bike does not come with pedals.
Sizing Information
Size in ft4'8" - 5'1"5'1" - 5'4"5'4" - 5'7"5'7" - 5'9"5'9" - 5'11"5'11" - 6'2"6'2" - 6'5"
Size in cm142 - 155cm155 - 163cm163 - 170cm170 - 175cm175 - 180cm180 - 188cm188 - 196cm
Bike Size44495254565861

GEOMETRY

Size44cm49cm52cm54cm56cm58cm61cm
BB Drop74mm74mm74mm72mm72mm72mm72mm
BB Height266mm266mm266mm268mm268mm268mm268mm
Bike Standover Height723mm735mm746mm768mm786mm808mm834mm
Chainstay Length410mm410mm410mm410mm410mm410mm410mm
Fork Length, Full370mm370mm370mm370mm370mm370mm370mm
Fork Rake/Offset47mm47mm47mm44mm44mm44mm44mm
Front Centre572mm574mm577mm579mm592mm606mm613mm
Head Tube Angle70.5°71.75°72.5°73°73.5°73.5°74°
Head Tube Length99mm109mm120mm137mm157mm184mm204mm
Frame Reach366mm375mm380mm384mm395mm402mm408mm
Seat Tube Angle75.5°75.5°74°74°73.5°73.5°73°
Seat Tube Length433mm445mm456mm473mm494mm515mm545mm
Frame Stack501mm514mm527mm544mm565mm591mm612mm
Top Tube Length, Horizontal496mm509mm531mm541mm563mm577mm595mm
Trail71mm63mm58mm58mm55mm55mm52mm
Wheelbase970mm973mm975mm978mm991mm1006mm1013mm
Stack to Stem509mm522mm535mm552mm573mm599mm620mm
Reach to Stem363mm372mm377mm381mm393mm400mm406mm
Crank Length165mm165mm170mm172.5mm172.5mm175mm175mm
Handlebar Width380mm380mm400mm400mm420mm420mm440mm
Stem Length75mm75mm90mm100mm100mm110mm110mm
Saddle Width155mm155mm155mm143mm143mm143mm143mm
Seatpost Length300mm300mm300mm380mm380mm380mm380mm
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£116.05