MountainVerified spec

2021 Giant Reign Advanced Pro 29 1

Launched at $5,750Lists today at $6,150 (2026-09)

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What a used one is worth

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New

$3,213

$2,075 to $3,871

Like new

$3,052

$1,971 to $3,678

Excellent

$2,892

$1,867 to $3,484

Good

$2,410

$1,556 to $2,903

Fair

$1,767

$1,141 to $2,129

For parts

$964

$622 to $1,161

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

Overview

Brand: Giant
Model family: Reign
Model year: 2021
Category: Mountain · enduro
Frame material: carbon
Sizes: S, M, L, XL
Wheel size: 29
Launch MSRP (US): $5,750
Current list price: $6,150 (as of 2026-09)

Drivetrain

Speeds: 12
Groupset: SRAM GX Eagle
Electronic: false

Build

Fork: Fox 38 Performance Elite, 170mm, GRIP2 damper, Boost 15x110 Kabolt, 44mm offset, custom tuned for Giant
Stem: Giant Contact SL 35
Tires: [F] Maxxis Assegai, tubeless, 29x2.5, WT, 3C, MaxxTerra, , EXO+, TR [R] Maxxis Minion DHR II, tubeless, 29x2.4, WT, 3C, MaxxTerra, EXO+, TR
Brakes: Shimano SLX hydraulic 4-piston, 203mm
Saddle: Giant Romero SL, SST rails
Wheels: Giant TR-1 29 alloy WheelSystem
Cassette: SRAM Eagle, 12-speed, 10x52
Crankset: Truvativ Descendent 6k, DUB, 32t, MRP MG V2 alloy guide
Seatpost: Giant Contact Switch dropper post with remote, 30.9
Shifters: SRAM GX Eagle
Handlebar: Giant Contact SL Trail, 35
Rear shock: Fox Float X2 Performance, 205/60, custom tuned for Giant
Travel rear mm: 146
Rear derailleur: SRAM GX Eagle
Travel front mm: 170

Geometry

L: Reach mm: 488; Stack mm: 631; Chainstay mm: 439; Wheelbase mm: 1262; Head angle deg: 64.6; Seat angle deg: 76.4
M: Reach mm: 451; Stack mm: 622; Chainstay mm: 439; Wheelbase mm: 1220; Head angle deg: 64.6; Seat angle deg: 76.4
S: Reach mm: 423; Stack mm: 622; Chainstay mm: 439; Wheelbase mm: 1191; Head angle deg: 64.6; Seat angle deg: 76.4
XL: Reach mm: 511; Stack mm: 640; Chainstay mm: 439; Wheelbase mm: 1289; Head angle deg: 64.6; Seat angle deg: 76.4

Price labels fixed 2026-09-27: msrp_usd set to the launch price $5,750 from a launch-season web.archive.org capture of the Giant US product page dated 2021-02-11, and the $6,150 shown on the archived model-year page (observed 2026-09-21) moved to list_price_usd (as of 2026-09).

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