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Specialized Roubaix SL8 Comp Shimano 105 Di2 Road Bike – Lightweight Endurance Performance
Specialized Roubaix SL8 Comp Shimano 105 Di2 Road Bike – Lightweight Endurance Performance
Specialized

2026 Specialized Roubaix SL8 Comp Shimano 105 Di2 Road Bike - Solidity

£3,599.00
Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined

2026 Specialized Roubaix SL8 Comp Shimano 105 Di2 Road Bike - Solidity

Season:2026

Brand:Specialized

Code:42218245383377

The Specialized Roubaix SL8 Comp Shimano 105 Di2 Road Bike is built to redefine endurance cycling, delivering the perfect balance of comfort, speed, and control. As the bike that pioneered the endurance road category, the Roubaix SL8 is now lighter, faster, and smoother than ever, giving you unmatched confidence on long-distance rides, rough roads, and even light gravel adventures.


Smooth Compliance with Future Shock 3.0

  • Future Shock 3.0 suspension system provides 20mm of adjustable, stiction-free travel for maximum comfort and control.
  • Pavé seatpost and AfterShock technology work together to improve vertical compliance without sacrificing pedalling efficiency.
  • Tested by Specialized Ride Science, the Roubaix SL8 reduces bar and saddle impacts by 53% compared to competitors, keeping momentum and stability on uneven terrain.

Endurance Capability for Any Road

  • Endurance-focused geometry positions you “in” the bike, reducing strain on hands, arms, and shoulders while boosting descending confidence.
  • Tyre clearance up to 40mm offers superior traction and adaptability for rough tarmac and light gravel.
  • Designed for adventure with three bottle cage mounts, top-tube mounts, and full fender compatibility.

Aero Performance & Lightweight Speed

  • Built from Specialized FACT 10r carbon, the frame weighs just 950g, making it one of the lightest in its class.
  • Aero tube shapes from the FreeFoil library and dropped seat stays enhance speed and efficiency.
  • Equipped with the latest Shimano 105 Di2 electronic groupset, delivering precise, reliable shifting for long rides and endurance events.

The Roubaix SL8 Comp Shimano 105 Di2 features an ultralight FACT 10r carbon frame, making it aero-optimised and endurance-ready. The Future Shock 3.0 suspension delivers a smoother, faster, and more controlled ride whilst theShimano 105 Di2 12-speed electronic drivetrain offers precision and reliability. The wide 40mm tyre clearance is ideal for road, endurance, and light gravel versatility, and this model has adventure-ready mounts for bottles, bags, and mudguards.

Technical Information
  • frame
    FACT 10R, Rider First Engineered™ (RFE), FreeFoil Shape Library tubes, threaded BB, 12x142mm thru-axle, flat-mount disc
  • fork
    Future Shock 3.2 w/ Smooth Boot, FACT Carbon 12x100mm, thru-axle, flat-mount disc
  • saddle
    Body Geometry Power Sport, steel rails
  • seat binder
    Hidden drop clamp
  • handlebars
    Specialized Hover Comp, Alloy, 125mm Drop, 75mm Reach w/Di2 Hole
  • stem
    Future Stem, Comp
  • seatpost
    S-Works Pave
  • grips
    Supacaz Super Sticky Kush
  • front brake
    Shimano 105, Hydraulic disc, 160mm
  • rear brake
    Shimano 105, Hydraulic disc, 160mm
  • chain
    Shimano SLX, M7100, 12-speed
  • cassette
    Shimano 105 12-speed 11-36
  • bottom bracket
    Shimano Threaded BSA BB
  • shift levers
    Shimano 105 Di2 R7170, 12-speed
  • front derailleur
    Shimano 105 Di2 R7150, braze-on
  • rear derailleur
    Shimano 105 Di2 R7150
  • crankset
    Shimano 105, 12-speed, 50/34T
  • inner tubes
    700x28/38mm, 48mm Presta valve
  • front tyre
    Mondo Folding Endurance Tire, 700x32c, GRIPTON T5
  • rear tyre
    Mondo Folding Endurance Tire, 700x32c, GRIPTON T5
  • front wheel
    DT Swiss G540 rim, 24mm internal width, tubeless ready, 24h, Specialized full sealed bearing thru axle hub, centerlock disc, DT Swiss Champion 14G stainless steel spokes, DT Swiss brass nipples
  • rear wheel
    DT Swiss G540 rim, 24mm internal width, tubeless ready, 24h, Specialized full sealed bearing thru axle hub, centerlock disc, DT Swiss Champion 14G stainless steel spokes, DT Swiss brass nipples
  • weight
    8.76 kg (19 lb, 5.0 oz)
  • weight size
    56cm
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

SIZING

Size in ft4'8" - 5'0"5'1" - 5'4"5'4" 5'7"5'7" - 5'10"5'9" - 6'0"5'11" - 6'2"6'2" - 6'5"6'5" - 6'9"
Size in cm142 - 152cm155 - 163cm163 - 170cm170 - 178cm175 - 183cm180 - 188cm188 - 196cm196 - 205cm
Bike Size4449525456586164

GEOMETRY

Size44cm49cm52cm54cm56cm58cm61cm64cm
BB Drop80mm80mm80mm78mm78mm78mm78mm78mm
BB Height269mm269mm269mm270mm270mm271mm271mm271mm
Bike Standover Height686mm719mm747mm766mm787mm809mm847mm865mm
Chainstay Length418mm418mm418mm420mm420mm423mm423mm423mm
Fork Length, Full375mm375mm375mm375mm375mm375mm375mm375mm
Fork Rake/Offset52mm52mm52mm47mm47mm47mm47mm47mm
Front Centre589mm587mm593mm598mm604mm620mm631mm634mm
Head Tube Angle69.3°70.8°71.5°72.3°73°73°73.5°73.5°
Head Tube Length90mm90mm105mm122mm140mm168mm202mm222mm
Reach353mm363mm370mm381mm389mm397mm403mm409mm
Seat Tube Angle75°74°74°74°73.5°73.5°73.5°73°
Seat Tube Length365mm410mm446mm465mm485mm505mm545mm581mm
Stack543mm549mm566mm585mm605mm630mm665mm685mm
Top Tube Length, Horizontal503mm523mm534mm550mm569mm584mm600mm618mm
Trail76mm66mm62mm61mm57mm57mm54mm54mm
Wheelbase994mm992mm998mm1005mm1012mm1031mm1042mm1054mm
Crank Length165mm165mm170mm172.5mm172.5mm175mm175mm175mm
Handlebar Width360mm380mm400mm420mm420mm440mm440mm440mm
Stem Length70mm80mm90mm100mm100mm110mm110mm120mm
Saddle Width155mm155mm155mm143mm143mm143mm143mm143mm
Seatpost Length380mm380mm380mm380mm380mm450mm450mm450mm
Professional Opinion
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