BMXVerified spec

2021 GT Mach One Expert

Launched at $350Lists today at $360 (2026-09)

Own a 2021 GT Mach One Expert?

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

What a used one is worth

New

$196

$126 to $236

Like new

$186

$120 to $224

Excellent

$176

$114 to $212

Good

$147

$95 to $177

Fair

$108

$69 to $130

For parts

$59

$38 to $71

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

Fork: GT BMX Race, Hi-Ten Steel 1 1/8" Steerer, Tapered Legs, 3/8" Dropouts
Stem: GT Top Load, 1", 40mm
Tires: Kenda Race, 20 x 1-3/8"
Brakes: Alloy V-type
Saddle: GT Uni Mini Padded
Wheels: Alloy Double Wall, 28h; Steel Body, 28h, 3/8" Axle / Steel Flip Flop Thread-on Body, Freewheel, 28h, 3/8" Axle
Cassette: 16T Freewheel
Crankset: GT Alloy Forged 3pc, 165mm, Square Taper, 38T
Seatpost: 22.2 Integrated
Handlebar: GT Race, Steel, 6.5"H x 26"W, 8° Back, 4° Up, 19mm O.D. Cross Bar

Expert: Chainstay mm: 13.39; Wheelbase mm: 34.86; Head angle deg: 73; Seat angle deg: 72

GT model code G41601U. Model year from the product code suffix on GT's page (_21). Launch price: GT US page captured 2020-09, inside the model year.

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