Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Giant
2009 Giant Aeryn Alliance
Value Guide market data · 2009 Giant Aeryn Alliance
12-month trend
— %
Direction and magnitude, not judgment
vs. category average
50%
Holds value better than category avg
Price over time - 2009 Giant Aeryn Alliance
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Aeryn model years
2009 Aeryn Alliance lineup
Overview
About this bike
2009 Giant Aeryn Alliance value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Frame Tubing Material
- Giant Alliance aluminum/composite, Compact Aero Road Design
Drivetrain
- Groupset
- Shimano 105
- Cassette
- Shimano 105, 10-speed: 11-23
- Chain
- Giant Aero
- Shifters
- Shimano Dura-Ace bar end
Brakes
- Brakes
- Shimano 105
Cockpit
- Handlebar
- Vision TriMax aero base bar w/clip-ons
- Stem
- Vision Size More
- Saddle
- Fizik Vitesse Tri
Wheels & Tires
- Hubs
- Formula sealed
- Spoke Brand
- SAPIM Race 14/15g
- Tires
- Michelin Pro3 Race, 700 x 23c
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.