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Aethos: Billions of calculations in the pursuit of one thing—the perfect ride.
Aethos: Billions of calculations in the pursuit of one thing—the perfect ride.

Specialized Aethos Expert Ultegra Di2 Carbon Road Bike 2023 in Chameleon Oil/Silver

£4,695.00 £7,250.00 35% off
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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
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Hassle free returns

Any item, except food, face masks or e-gift vouchers (full e-gift vouchers T&Cs are listed on the respective product pages) can be returned to us for any reason within 90 days, provided that the item has not been used or fitted and is returned in its original packaging with valid proof of purchase. It is recommended that you use a recorded delivery service to ensure your items are received by us. We cannot assume responsibility for items that are lost in the post.

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Items must be returned in their original packaging and unused. Refunds will be issued once the products have been received and inspected.

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Please note:

1. If the items we have sent you are faulty, damaged or not as we described, we will cover the cost of collection and the delivery of the correct item.

2. If we have delivered the correct bike but upon inspection, you decide the bike is not the one for you, we will charge you £24.99 for collection. If you do not have the original box, we will charge you an additional £15 to provide one.

Refunds will be processed using the same method of payment used for the original purchase. Credit & debit card refunds must be made to the card used for the original purchase.

We are unable to offer a refund without a valid receipt.

Specialized Aethos Expert Ultegra Di2 Carbon Road Bike 2023 in Chameleon Oil/Silver




Aethos: Billions of calculations in the pursuit of one thing—the perfect ride. It’s more than just a motto, it’s a philosophy. The Aethos has been designed to straddle the line between a perfected ride quality, extreme light weight, and undeniable style, and this Expert model is no exception.

With quick-shifting, low-maintenance Ultegra Di2 electronic shifting and hydraulic disc brakes paired with bomb-proof Roval C38 Disc carbon wheels, you have the perfect steed to get you out on the road.

The Aethos frame has been designed with the perfect combination of ultimate ride feel, light weight, and style—from accelerating up steep pitches and descending technical descents, to all-day saddle comfort on even the longest coffee rides, the Aethos hits the mark. But how, you ask? By reinventing the traditional road shape found on bikes of the past, we’ve subtly altered these shapes to deliver massive gains in stiffness and balance, all without affecting weight or durability. Pair that with an entirely new layup and process that we’ve perfected over multiple decades and you have the lightest frame out there (585 grams, S-Works, size 56cm). The Aethos is more than just a new bike, it’s the first of a new breed.
A featherweight frame is useless without confidence-inspiring ride characteristics, which is why we’ve developed the Aethos to have the perfect balance of front and rear stiffness combined with exceptional ride quality. By studying the flexing and breathing of carbon fiber, we were able to discover groundbreaking findings about how forces flow through frames. Just a few pedal strokes and you’ll realize this sublime ride sets a new standard.
Every detail, from the derailleur hangers to the fork expander plug have been designed with style, weight, and durability in mind. We’ve also spec’d it with Roval’s all-new Alpinist carbon seatpost, further saving weight and improving ride characteristics. Everything in pursuit for the perfect ride.

Key Features & Benefits

  • Fact 10r Carbon frame:Lightweight and lively for the best all-round road bike ever designed.
  • Shimano Hydraulic disc brakes:Stop faster, by spending less time on the brakes your average speed will increase for no extra effort.
  • Shimano Ultegra R8170 Di2 12 speed:Precise and reliable shifting with a wide range of gears for any climb or descent.

Full Specification

  • Frame:Aethos FACT 10r Carbon, Rider First Engineered™, Threaded BB, 12x142mm thru-axle, flat-mount disc
  • Fork:FACT Carbon, 12x100mm thru-axle, flat-mount disc
  • Number of Gears:24
  • Gear Shifters:Shimano Ultegra Di2 R8170, hydraulic disc
  • Chainset:Shimano Ultegra R8100
  • Chainrings:52/36T
  • Rear Cassette:Shimano Ultegra, 12-speed, 11-30t
  • Chain:Shimano XT M8100, 12-speed w/ quick link
  • Front Derailleur:Shimano Ultegra Di2 R8150, braze-on
  • Rear Derailleur:Shimano Ultegra Di2 R8150, 12-speed
  • Bottom Bracket:Shimano Threaded BSA BB
  • Pedals:Not supplied:Shop pedals here
  • Rims:Roval C38, 21mm internal width carbon rim
  • Front Hub:Roval C38
  • Rear Hub:Roval C38
  • Front Tyre:S-Works Turbo, 120 TPI, folding bead, BlackBelt protection, 700x26mm
  • Rear Tyre:S-Works Turbo, 120 TPI, folding bead, BlackBelt protection, 700x26mm
  • Brakes:Shimano Ultegra R8170, hydraulic disc
  • Handlebars:Specialized Expert Shallow Drop, alloy, 125mm drop x 75mm reach
  • Handlebar Tape:Supacaz Super Sticky Kush
  • Headset:N/A
  • Stem:Specialized Pro SL, alloy, 4-bolt
  • Saddle:Body Geometry Power Expert, Hollow Titanium Rails
  • Seatpost:Roval Alpinist Carbon Seatpost
  • Accessories:N/A
  • Weight:Not available
Manufacturers reserve the right to change specifications without notice based on availability at the point of assembly.

Sizing Guide For Specialized Aethos

Frame Size (cm)Height (cm)Height (Inches)
49155 - 1635'1"- 5'4"
52163 - 1705'4" - 5'7"
54170 - 1755'7" - 5'10"
56175 - 1835'9" - 6'0"
58180 - 1885'11" - 6'2"
61188 - 1966'2" - 6'5"

Geometry Information For SpecializedAethos

Crank Length165mm170mm172.5mm172.5mm175mm175mm
Handlebar Width380mm400mm420mm420mm440mm440mm
Stem Length80mm90mm100mm100mm110mm110mm
Saddle Width155mm155mm143mm143mm143mm143mm
Seatpost Length300mm300mm360mm360mm360mm360mm
Head Tube Length109mm120mm137mm157mm184mm204mm
Head Tube Angle71.75°72.5°73°73.5°73.5°74°
BB Height266mm266mm268mm268mm268mm268mm
BB Drop74mm74mm72mm72mm72mm72mm
Fork Length, Full369mm369mm369mm369mm369mm369mm
Fork Rake/Offset47mm47mm44mm44mm44mm44mm
Front Center574mm577mm579mm591mm606mm613mm
Chainstay Length410mm410mm410mm410mm410mm410mm
Top Tube Length, Horizontal508mm531mm540mm562mm577mm595mm
Bike Standover Height705mm728mm748mm769mm796mm824mm
Seat Tube Length431mm462mm481mm504mm532mm567mm
Seat Tube Angle75.5°74°74°73.5°73.5°73°

Warranty Information for Specialized Bikes and Wheels

Policy TermCoverage for Registered ProductsCoverage if Not Registered

Lifetime warranty* to the original owner against structural defects in material or workmanship on ALL models of Specialized-branded frames and forks

• Includes seatstays and chainstays on full-suspension bikes
• Does not include suspension forks and suspension parts
• Does not include paint and graphics (these are covered below)
Lifetime2 Years
Lifetime warranty* on Roval wheelsLifetime2 Years

Other Specialized-branded products are covered by a two-year warranty

• Paint and graphics on frames and frame set
• Specialized branded components
• Co-branded suspension (BRAIN)
• Motors & Drive systems components on e-bikes
• Equipment
• Helmets
• Shoes
2 Years2 Years

Turbo batteries have a warranty for 2 years or 300 charge cycles— whichever comes first.

2 years2 years

*Register your bike, frameset, or Roval wheels within the first 90 days of purchase for a lifetime warranty to the original owner. For Full warranty policy please visit

Technical Information
  • Frame
    Aethos FACT 10R Carbon, Rider First Engineered™, Threaded BB, 12x142mm thru-axle, flat-mount disc
  • Fork
    FACT Carbon, 12x100mm thru-axle, flat-mount disc
  • Handlebars
    Specialized Expert Shallow Drop, alloy, 125mm drop x 75mm reach
  • Stem
    Specialized Pro SL, alloy, 4-bolt
  • Tape
    Supacaz Super Sticky Kush
  • Saddle
    Body Geometry Power Expert, titanium rails
  • SeatPost
    Roval Alpinist Carbon Seatpost
  • Seat Binder
    Specialized Alloy, 30mm
  • 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, 11-30t
  • Crankset
    Shimano Ultegra R8100
  • Chainrings
  • Bottom Bracket
    Shimano Threaded BSA BB
  • Chain
    Shimano Ultegra, 12-speed
  • Front Wheel
    Roval C38, 21mm internal width carbon rim
  • Rear Wheel
    Roval C38, 21mm internal width carbon rim
  • Front Tire
    S-Works Turbo, 120 TPI, folding bead, BlackBelt protection, 700x26mm
  • Rear Tire
    S-Works Turbo, 120 TPI, folding bead, BlackBelt protection, 700x26mm
  • Inner Tubes
    Turbo Ultralight, 48mm Presta valve
Sizing Information
Professional Opinion
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  • What is the weight of the 58cm?
    Question asked by Tom on 18/09/2023 18:01:54
    The weight ois 585 grams, for a size 56cm, so a 58 will be fractionally more. Weights are based on production painted frames.
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