Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Specialized
2021 Specialized Aethos Pro Ultegra Di2
Value Guide market data · 2021 Specialized Aethos Pro Ultegra Di2
12-month trend
16%
Direction and magnitude, not judgment
vs. category average
— %
No category comparison available
Price over time - 2021 Specialized Aethos Pro Ultegra Di2
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Aethos model years
2021 Aethos Pro Ultegra Di2 lineup
Overview
About this bike
2021 Specialized Aethos Pro Ultegra Di2 value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Fork
- FACT Carbon, 12x100mm thru-axle, flat-mount disc
- Frame
- Aethos FACT 10r Carbon, Rider First Engineered, Threaded BB, 12x142mm thru-axle, flat-mount disc
Drivetrain
- Groupset
- 2021 Specialized Aethos Pro Ultegra Di2
- Crankset
- Shimano Ultegra R8000, HollowTech 2, 11-speed
- Chain
- Shimano Ultegra, 11-speed
- Front Derailleur
- Shimano Ultegra Di2 R8050, braze-on
- Rear Derailleur
- Shimano Ultegra Di2 R8050, GS medium cage
- Shifters
- Shimano Ultegra Di2 Disc R8070
Brakes
- Brakes
- Shimano Ultegra R8070, hydraulic disc
Cockpit
- Saddle
- Body Geometry Power Pro, Hollow Titanium Rails, Carbon Fiber Base
- Stem
- Specialized Pro SL, alloy, 4-bolt
- Handlebars
- S-Works Short & Shallow
- Seat Post
- Roval Alpinist Carbon Seatpost
- Tape/Grips
- Supacaz Super Sticky Kush
Wheels & Tires
- Tires
- S-Works Turbo, 120 TPI, folding bead, BlackBelt protection, 700c x 26
Pedals
- Pedals
- Sold separately
Accessories
- Rims/Wheels
- Roval Alpinist CL, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, DT for Roval 350 hub, DT Swiss Aerolite spokes
- Color
- Satin Blue Murano/Carbon/Cobalt
Weight & Sizing
- Size
- 49cm / 52cm / 54cm / 56cm / 58cm / 61cm
Frame sizing
XS4'10"-5'2"
S5'2"-5'6"
M5'6"-5'10"
L5'10"-6'2"
XL6'2"-6'6"
M highlighted as most common resale size. Sourced from catalog metadata.
Geometry
- Stack
- Varies by size
- Reach
- Varies by size
- Wheelbase
- Varies by size
Industry standard. Sourced from catalog metadata.
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Wheel condition
Inspect rims, hubs, spokes, and bearing play; ask about the tire age and any prior wheel rebuilds.
Inspection
Service history
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.
Inspection
Carbon inspection
Tap test the frame, fork, seatpost, and bars for cracks; verify no impact damage near dropouts.
Inspection
Brake hoses & cables
Check hydraulic line bleed, cable housing wear, and confirm rotors are within spec.