Aethos 2 Expert Di2 Road Bike - Grey - Size 54
Weighing in with just 705g making up the frame, Specialized’s Aethos 2 is the lightest bike in its...Weighing in with just 705g making up the frame, Specialized’s Aethos 2 is the lightest bike in its class. Built with rider first engineering, a refined fit and geometry and Flow State design, the Aethos 2 Expert Di2 provides an exceptional performance out on the road in its responsive handling, confident grip and enhanced comfort for long day’s out on endurance rides. The Roval C38 carbon fiber wheels and Aethos’s construction mean you can employ tyres of up to 35mm for smoother, faster rides on the road and expert grip in the face of slick tarmac and tight corners. The Alpinist bar, stem and handlebars are built to shave every precious gram you need to go faster, with the handlebars weighing in at 15% lighter than the S-Works Short & Shallow bar – all culminating in a road bike that rolls on in the face of big climbs, slick city streets and those among us who demand cutting-edge performance and timeless style all in one. Engineered with a Shimano Ultegra Di2 drivetrain in which you can rely on for pro-level performance and rapid, smooth and reliable shifting, the Aethos 2 Expert also features small changes that make all the difference, from the increased stack height of 15mm to take the pressure off your hands, neck and shoulders, a 7mm longer wheelbase for stability that inspires confidence even on the downhill, a 3mm lower bottom bracket optimised for higher volume tyres and a 0.5° slacker headtube for intuitive handling. From the data-enhanced geometry and carbon fiber wheels to a premium drivetrain and lightweight frame, everything about the Aethos 2 Expert Di2 Road Bike has been optimised to ensure it’s a more versatile and confidence-inspiring experience for endurance adventures on the road. Features: With a 705g frame, the Aethos 2 is the lightest bike in its class Flow State design: visually subtle yet radicaly significant evolution to traditional round tubes into sculpted forms, precisely tuned to optimise energy flow through the structure Rider first engineered: regardless of the bike's size, every rider gets the Aethos ride quality Refined fit and geometry for precise handling in a more versatile and comfort-inspiring package Increased stack height of 15mm to help take the pressure off your hands, neck and shoulders 7mm longer wheelbase for confidence to push the pace on descents 0.5° slacker headtube creates nimble but intuitive handling 3mm lower bottom bracket height is optimised for higher volume road tyres and a more connected feeling to the bike and road Aethos 2 clears 35mm tyres with ease for smoother, faster rides, more grip and more roads Multiple grams shaved to create the Aethos 2's levity: 9g saved in the saddle rail clamp, 6g saved in the bottom bracket shell, 2g saved in the brake mounts, 2g saved in the lightweight UDH Alpinist bar and stem, and Roval C38 wheels are purpose-built to elevate the bike while delivering significant weight savings Roval C38 wheels brings carbon fibre high performance for a versatile all-rounder equally at home crushing rough miles and summiting alpine passes Alpinist handlebars: 15% lighter that the S-Works Short & Shallow bar - built for big climbs, city-limit sprints and riders who demand timeless style with cutting-edge performance Drivetrain: Shimano Ultegra Di2 Fit: performance endurance Use: performance road riding Weight (size 56): 7.12kg / 15lbs, 11.2oz (tubeless) Notice: Please note: Specialized state that specifications are subject to change without notice. Specialized also note that weights provided are based on production painted frames as pictured. Actual weights will vary based on colourway, frame size and component variation.The Specialized Aethos Expert Di2 blends cutting-edge carbon design with effortless electronic shifting. Light, smooth, and responsive, it delivers pure road-riding enjoyment on climbs, descents, and long days in the saddle.Key Features:Frame: FACT 10r carbon, Rider First Engineered™ geometry for balanced stiffness and comfortFork: FACT 10r carbon fork with thru-axle and flat-mount discDrivetrain: Shimano Ultegra Di2 12-speed electronic groupsetBrakes: Shimano Ultegra BR-R8170 hydraulic disc brakesWheels: Roval C38 carbon rims with S-Works Turbo 700x28 tyresFeature: Roval Alpinist carbon cockpit for lightweight performanceFinance: Available with 0% APR financeThe Specialized Aethos Expert Di2 is built for riders who love the simple joy of road cycling — where speed, balance, and comfort come together perfectly. Every detail has been engineered to make the bike disappear beneath you, delivering a natural, responsive ride that feels fast and effortless.The Aethos FACT 10r carbon frame combines low weight with exceptional stiffness and compliance. Using Specialized’s Rider First Engineered™ design, each frame size is tuned to deliver identical ride quality, ensuring a perfect balance of responsiveness and comfort for every rider. Clean hidden cable routing and a threaded bottom bracket add practical durability to the sleek design.Matched with a FACT 10r carbon fork, the Aethos feels stable and smooth across fast descents and tight corners. The handling is precise yet predictable — ideal for riders who value a bike that reacts instantly to every input.The Shimano Ultegra Di2 12-speed groupset brings reliable, lightning-fast electronic shifting and consistent braking in all weather conditions. Hydraulic disc brakes ensure smooth, powerful stopping performance with easy modulation, giving total control on mountain descents or tight urban routes.Rolling on Roval C38 carbon wheels and S-Works Turbo 28mm tyres, the Aethos balances climbing agility with aerodynamic efficiency. The Roval Alpinist carbon handlebar and seatpost keep the weight low while absorbing road vibrations, so you can stay fresh on longer rides.Weighing just 7.12 kg, the Aethos Expert Di2 proves that performance doesn’t have to come at the cost of comfort. With refined geometry, premium carbon construction, and precision components, it’s a road bike that’s designed to inspire confidence and pure enjoyment on every ride.The Specialized Aethos Expert Di2 is more than a race bike — it’s a celebration of the ride itself. Built for cyclists who value feel as much as speed, it’s the perfect partner for endless miles of smooth tarmac and sweeping climbs.
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