BMXVerified spec

2021 GT Mach One Pro

Launched at $400Lists today at $360 (2026-09)

Own a 2021 GT Mach One Pro?

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

What a used one is worth

New

$224

$144 to $269

Like new

$212

$137 to $256

Excellent

$201

$130 to $242

Good

$168

$108 to $202

Fair

$123

$79 to $148

For parts

$67

$43 to $81

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, 1-1/8", 50mm
Tires: GT Wing 20 x 1.75"
Brakes: Alloy V-type
Saddle: Railed
Wheels: Alloy Single Wall, 36h; Steel Body, 36H, 3/8" Axle / Steel Flip Flop Thread-on Body, Freewheel, 36h, 3/8" Axle
Cassette: 16T Freewheel
Crankset: GT Power Series Tubular Cr-Mo 3pc., 175mm Arms, 19mm x 8T Splined Spindle, Steel Spider, GT 44T Steel Chainring
Seatpost: Alloy, 27.2mm x 200mm
Handlebar: GT Race, Steel, 8.25"H x 29"W, 3° Up, 11° Back

LG: Chainstay mm: 14.37; Wheelbase mm: 37.46; Head angle deg: 74; Seat angle deg: 72

GT model code G41701U. Model year from the product code suffix on GT's page (_21). Launch price: GT US page captured 2021-01, inside the model year.

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