Specialized Aethos Pro Ultegra Di2

Specialized Aethos Pro Ultegra Di2 Overview

The Specialized Aethos Pro Ultegra Di2 is a lightweight road bike built with an Aethos FACT 10r carbon frame, FACT carbon fork, and Shimano Ultegra Di2 12-speed drivetrain. The frame uses Rider First Engineered construction, a threaded bottom bracket, 12x142mm rear thru-axle spacing, and flat-mount disc brake compatibility.

This build pairs Shimano Ultegra Di2 R8170 hydraulic disc shift levers with Shimano Ultegra Di2 R8150 front and rear derailleurs. The drivetrain includes a Shimano Ultegra 11-30t 12-speed cassette, Shimano M8100 12-speed chain with quick link, Shimano Threaded BSA bottom bracket, and Shimano Ultegra R8100 crankset with a 4iiii Precision 3+ Power Meter and 52/36T chainrings.

The bike uses Roval Alpinist CL II Tubeless Ready carbon wheels with 33mm-deep rims, 21mm internal width, DT for Roval 350 hubs, and DT Swiss Aerolite spokes. S-Works Turbo 2BR 700x28mm tires, a Specialized Pro SL alloy stem, S-Works Short & Shallow handlebar, Body Geometry Power Pro with Mirror saddle, and Roval Alpinist Carbon Seatpost complete the build. The weight is 6.78 kg / 14 lb 15.2 oz in size 56.

Key Features of Specialized Aethos Pro Ultegra Di2

• Aethos FACT 10r carbon frame creates a lightweight road platform with a threaded bottom bracket, 12x142mm thru-axle, and flat-mount disc compatibility.
• FACT carbon fork uses a 12x100mm thru-axle and flat-mount disc setup.
• Shimano Ultegra Di2 R8170 shift levers and R8150 derailleurs deliver 12-speed Di2 shifting.
• Shimano Ultegra R8170 hydraulic disc brakes use a 160mm front rotor and 140mm rear rotor.
• Shimano Ultegra R8100 crankset includes a 4iiii Precision 3+ Power Meter and 52/36T chainrings.
• Roval Alpinist CL II Tubeless Ready carbon wheels use 33mm-deep rims, 21mm internal width, DT for Roval 350 hubs, and DT Swiss Aerolite spokes.
• S-Works Turbo 2BR 700x28mm tires match the road-focused wheel package.
• S-Works Short & Shallow handlebar, Specialized Pro SL alloy stem, and Roval Alpinist Carbon Seatpost complete the cockpit and seating package.

Ride Use

This bike is built for lightweight road riding, supported by its FACT 10r carbon frame, FACT carbon fork, Roval Alpinist CL II carbon wheels, and 6.78 kg weight. The Shimano Ultegra Di2 12-speed drivetrain, Ultegra hydraulic disc brakes, 700x28mm tires, and carbon seatpost give it a premium road-focused component package.

Why Choose This Bike

Choose this bike for a lightweight road build centered on the Aethos FACT 10r carbon frame and Shimano Ultegra Di2 drivetrain. It combines Ultegra hydraulic disc brakes, an Ultegra crankset with a 4iiii Precision 3+ Power Meter, Roval Alpinist CL II Tubeless Ready carbon wheels, S-Works Turbo 2BR 700x28mm tires, and a 6.78 kg weight in size 56. Color options are Satin Carbon and Gloss Champagne, with frame and fork covered by a lifetime warranty for the original owner and other Specialized-branded parts covered for 2 years.