MountainPartial spec

2021 Giant Reign 29 2

Lists today at $3,650 (2026-09)

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What a used one is worth

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New

$2,040

$1,317 to $2,457

Like new

$1,938

$1,251 to $2,334

Excellent

$1,836

$1,185 to $2,212

Good

$1,530

$988 to $1,843

Fair

$1,122

$724 to $1,352

For parts

$612

$395 to $737

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: aluminum
Sizes: S, M, L, XL
Wheel size: 29
Current list price: $3,650 (as of 2026-09)

Drivetrain

Groupset: Shimano SLX
Electronic: false

Build

Fork: RockShox Yari RC, 170mm, Boost 15x110 Maxle Stealth, 42mm offset, custom tuned for Giant
Stem: Giant Contact SL 35
Tires: [F] Maxxis Assegai, tubeless, 29x2.5 WT, MaxxTerra, EXO+, TR [R] Maxxis Minion DHR II, tubeless, 29x2.4 WT, MaxxTerra , EXO+, TR
Brakes: Tektro Orion HD-M475 Disc Brake and Lever - Front Hydraulic Post Mount Black
Saddle: Giant Romero
Wheels: Giant AM 29 wheelset, alloy, 30mm inner
Cassette: Shimano Deore, 10-51
Crankset: Shimano SLX, 32t, MRP AMG V2 guide
Seatpost: Giant Contact Switch dropper post with remote, 30.9
Shifters: Shimano SLX
Handlebar: Giant Contact Trail, 35
Rear shock: RockShox Deluxe Select+, 205/60, custom tuned for Giant
Travel rear mm: 146
Rear derailleur: Shimano SLX, Shadow+
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

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 $3,650 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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