RoadPartial spec

2021 Giant Defy Advanced Pro 1 Di2

Lists today at $6,500 (2026-09)

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What a used one is worth

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New

$3,632

$2,346 to $4,376

Like new

$3,451

$2,228 to $4,157

Excellent

$3,269

$2,111 to $3,938

Good

$2,724

$1,759 to $3,282

Fair

$1,998

$1,290 to $2,407

For parts

$1,090

$704 to $1,313

From the launch price, aged to 2026 and adjusted for condition. Guidance from our catalog, not an appraisal.

Overview

Brand: Giant
Model family: Defy
Model year: 2021
Category: Road · endurance
Frame material: carbon
Sizes: XS, S, M, ML, L, XL
Wheel size: 700c
Current list price: $6,500 (as of 2026-09)

Drivetrain

Speeds: 11
Groupset: Shimano Ultegra Di2
Electronic: true

Build

Fork: Advanced-Grade Composite, full-composite OverDrive 2 steerer, disc
Stem: Giant Contact SL
Tires: Giant Gavia Fondo 1, tubeless, 700x32c, folding
Brakes: Shimano Ultegra hydraulic
Saddle: Giant Fleet SL, composite base, SST rails, UniClip accessory mount
Wheels: Giant SLR-1 Carbon Disc WheelSystem, 42mm
Cassette: Shimano Ultegra, 11x34
Crankset: Shimano Ultegra, 34/50 with Giant Power Pro power meter
Seatpost: Giant D-Fuse SLR, composite
Shifters: Shimano Ultegra Di2
Handlebar: Giant Contact SLR D-Fuse, composite
Rear derailleur: Shimano Ultegra Di2

Geometry

L: Reach mm: 390; Stack mm: 605; Chainstay mm: 420; Wheelbase mm: 1025; Head angle deg: 72.5; Seat angle deg: 73
M: Reach mm: 377; Stack mm: 567; Chainstay mm: 420; Wheelbase mm: 998; Head angle deg: 72.5; Seat angle deg: 73.5
S: Reach mm: 374; Stack mm: 546; Chainstay mm: 420; Wheelbase mm: 995; Head angle deg: 71.8; Seat angle deg: 74
ML: Reach mm: 381; Stack mm: 586; Chainstay mm: 420; Wheelbase mm: 1010; Head angle deg: 72.5; Seat angle deg: 73
XL: Reach mm: 398; Stack mm: 624; Chainstay mm: 420; Wheelbase mm: 1040; Head angle deg: 72.5; Seat angle deg: 72.5
XS: Reach mm: 370; Stack mm: 522; Chainstay mm: 420; Wheelbase mm: 995; Head angle deg: 70.5; Seat angle deg: 74.5

Last Giant US MSRP shown on the archived model-year page, observed 2026-09-21; not the launch MSRP (Giant changed this model year's price after launch). Price labels fixed 2026-09-27: moved $6,500 from msrp_usd to list_price_usd (as of 2026-09) and set msrp_usd to null per the Giant model-year price audit.

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