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2018 Giant Defy Advanced 1

Launched at $2,425

Own a 2018 Giant Defy Advanced 1?

Track its value in your garage, or list it for sale locally in a few taps.

What a used one is worth

New

$1,055

$638 to $1,313

Like new

$1,002

$606 to $1,248

Excellent

$950

$574 to $1,182

Good

$791

$478 to $985

Fair

$580

$351 to $722

For parts

$317

$191 to $394

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

L: Reach mm: 390; Stack mm: 605; Chainstay mm: 420; Wheelbase mm: 1022; Head angle deg: 72.5; Seat angle deg: 73
M: Reach mm: 377; Stack mm: 567; Chainstay mm: 420; Wheelbase mm: 995; Head angle deg: 72.5; Seat angle deg: 73.5
S: Reach mm: 373; Stack mm: 546; Chainstay mm: 420; Wheelbase mm: 990; Head angle deg: 72; Seat angle deg: 74
XL: Reach mm: 398; Stack mm: 624; Chainstay mm: 420; Wheelbase mm: 1037; Head angle deg: 72.5; Seat angle deg: 72.5
M/L: Reach mm: 381; Stack mm: 586; Chainstay mm: 420; Wheelbase mm: 1007; Head angle deg: 72.5; Seat angle deg: 73

MSRP as listed on the Giant Group US product page for this model year, accessed 2026-09-21.

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