This item is no longer available to buy. View similar products.

Specialized Aethos Sport 105 Road Bike

This item is no longer available to buy. View similar products.

Product ID: 1876776

Specialized Aethos Sport 105 Road Bike

The Specialized Aethos Sport 105 Road Bike is a masterclass in ride quality, lightweight performance, and timeless style. Built for cyclists who demand excellence, this model pairs Shimano 105 mechanical shifting and hydraulic disc brakes with robust DT Swiss R470 Disc wheels, creating a reliable and exciting road companion.

The Aethos frame redefines traditional road bike design, offering unparalleled stiffness and balance while maintaining exceptional lightness and durability. Through decades of refinement, Specialized has developed an innovative carbon layup process that results in one of the lightest frames available, with the S-Works size 56cm weighing just 585 grams. The frame delivers confidence-inspiring handling and a sublime ride feel, setting a new benchmark for performance and comfort, whether on steep climbs, technical descents, or all-day rides.

Every detail, from the derailleur hangers to the fork expander plug, has been meticulously crafted for weight savings, durability, and style. Paired with the lightweight Roval Alpinist carbon seatpost, the Aethos Sport 105 exemplifies the pursuit of the perfect ride.

Technical Specification

Frame Aethos FACT 9R Carbon, Rider First Engineered, Threaded BB, 12x142mm thru-axle, flat-mount disc
Fork FACT Carbon, 12x100mm thru-axle, flat-mount disc
Front Brake Shimano 105, Hydraulic disc, 160mm rotor
Rear Brake Shimano 105, Hydraulic disc, 140mm rotor
Chainrings 50/34T
Shift Levers Shimano 105, 12-speed Mechanical
Cassette Shimano 105, 12-speed, 11-34T
Crankset FC-R7100, 105, 12-Speed, Hollowtech 2
Front Derailleur Shimano 105, Braze-on
Rear Derailleur Shimano 105, 12-speed Mechanical
Chain Shimano SLX, M7100, 12-speed
Bottom Bracket Shimano Threaded BSA BB
Inner Tubes Presta Valve Standard, 48mm valves
Front Wheel DT Swiss R470 rim, 20mm 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 R470 rim, 20mm 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
Tyres Turbo Pro, 700x28
Saddle Body Geometry Power Sport, steel rails
Tape Supacaz Super Sticky Kush
Seatpost Roval Alpinist Carbon Seatpost
Seat Binder Specialized Alloy, 30mm
Stem Specialized Pro SL, alloy, 4-bolt
Handlebars Specialized Shallow Drop, 6061, 70x125mm, 31.8mm clamp

Built, Checked, Tuned and Tested

All our bikes are fully built, checked, tuned and tested by our Cytech qualified mechanics and then securely packaged, ready for delivery. All you have to do is add the pedals (if included), attach the handlebars to the stem and tighten them following the included detailed instructions or by watching our video and using the provided FREE tools. Visit our Bike Assembly page to see how you assemble your new bike once you receive it.

All bikes collected from our shop, are built, tested and ready to ride. For hassle-free home delivery and bike set-up from a qualified mechanic use our Premier Delivery Service

Please note, occasionally, manufacturers may change the specification without notice. Bicycles do not come with pedals unless otherwise specified. Bikes ordered for delivery will not arrive with the pedals installed, please refer to the owners manual and pedal installation guides provided for guidance. We do not install accessories to bikes, including mudguards. Bikes ordered for delivery that have tubeless compatible tyres and rims will arrive with inner tubes installed or with tubeless valves installed, this will be brand dependent. Sealant is available to be purchased separately.

If you require any assistance please contact our Customer Care team.


Specialized Aethos Sport 105 Road Bike Sizing



Unable to display Reviews due to Privacy Settings.

Adjust your Cookie Preferences to Opt-in "YES" to "Functional Cookies".

Unable to display Q&A due to Privacy Settings.

Adjust your Cookie Preferences to Opt-in "YES" to "Functional Cookies".

Why buy your bike from Sigma Sports?

sigma sports expert advice
Expert Advice

Don't hesitate to reach out to us. It's our goal to answer all of your questions and offer the best advice from our experts. We’ll be happy to answer any questions you may have. Contact us now or visit us in-store.

sigma sports cycle schemes
Cycle to Work Schemes

Save up to 47% with any one of our 11 Cycle to Work partners, and get the health benefits of a new bike in exchange for tax free salary sacrifice. To find out more about our various partners and how to apply click here.

Bike Delivery Options

Choose between Free Bike Delivery - to your home or place of work - or our new Premier Bike Delivery Service £99.99 and have your bike delivered "ready to ride" and set up to your measurements with seatpost and pedals adjusted on arrival by a qualified bike mechanic. Either way, our Customer Care team will be in touch to arrange a delivery date to suit you.

laka insurance
Laka Insurance

We've partnered with Laka to offer you 30 days free bike Insurance on your new bike purchase over £400. Click here for more info and find out how to claim.