KidsVerified spec

2021 GT Stomper Ace 26

Lists today at $650 (2026-09)

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What a used one is worth

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New

$363

$235 to $438

Like new

$345

$223 to $416

Excellent

$327

$211 to $394

Good

$272

$176 to $328

Fair

$200

$129 to $241

For parts

$109

$70 to $131

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

Overview

Brand: GT
Model family: Stomper
Model year: 2021
Category: Kids · mountain
Frame material: aluminum
Sizes: One Size
Wheel size: 26
Current list price: $650 (as of 2026-09)

Drivetrain

Speeds: 8
Electronic: false

Build

Fork: SR Suntour XCM, 100mm, Coil with Preload
Stem: Alloy Ahead, 30mm
Tires: Kenda Small Block Eight, 26 x 2.1"
Brakes: Promax Mech Disc, 160mm Rotors
Saddle: GT MTB
Wheels: All Terra Double Wall, 32h; Alloy Disc QR, 32H / Alloy Cassette, QR
Cassette: Sunrace, fm ZINC to BLK
Crankset: Prowheel w/ Double Guard, 30T, 130mm
Seatpost: Alloy Micro Adjust
Shifters: Microshift TS39-8R
Handlebar: Alloy Riser Bar, 30mm Rise, 580mm Width
Rear derailleur: Microshift RD M-26L
Travel front mm: 100

Geometry

One Size: Reach mm: 286; Stack mm: 411; Chainstay mm: 366; Wheelbase mm: 839; Head angle deg: 69.5; Seat angle deg: 68

GT model code G54101U. Model year from the product code suffix on GT's page (_21). No first-party price capture inside the model year window was found; the observed price is recorded as a list price with its date.

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