KidsVerified spec

2021 GT Stomper Ace 24

Lists today at $575 (2026-09)

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What a used one is worth

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New

$321

$207 to $387

Like new

$305

$197 to $368

Excellent

$289

$187 to $348

Good

$241

$156 to $290

Fair

$177

$114 to $213

For parts

$96

$62 to $116

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: 24
Current list price: $575 (as of 2026-09)

Drivetrain

Speeds: 7
Electronic: false

Build

Fork: All Terra CH-565, 50mm, Coil
Stem: Alloy Ahead, 30mm
Tires: Kenda Small Block Eight 24 x 2.10"
Brakes: Promax Mech Disc, 160/160mm Rotors
Saddle: GT MTB
Wheels: All Terra Double Wall, 28h; Alloy Disc QR, 28H / 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: 50

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 G54201U. 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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