BMXVerified spec

2020 GT Mach One Junior

Launched at $350Lists today at $350 (2019-10)

Own a 2020 GT Mach One Junior?

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

What a used one is worth

New

$180

$114 to $219

Like new

$171

$108 to $208

Excellent

$162

$102 to $197

Good

$135

$85 to $164

Fair

$99

$63 to $121

For parts

$54

$34 to $66

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

Fork: GT BMX Junior Race, Hi-Ten Steel 1" Steerer, Oval 31.8 X 1.4mm Blades, 315mm A/C, 3/8" Dropouts
Stem: GT Top Load 1" Aluminum, 40mm
Tires: Kenda Race, 20 x 1-3/8"
Brakes: Alloy V-type
Saddle: GT Uni Mini Kevlar Padded
Wheels: Alloy Double Wall, 28h; Steel Body, 28h, 3/8" Axle
Cassette: 14T freewheel
Crankset: Alloy Forged 3pc., Square Taper, 140mm, BCD110, 36T Steel Chain Ring, Chain Ring Bolts
Seatpost: Alloy integrated w/ Saddle, 25.4 x 150mm
Handlebar: GT Race, Steel, 4"H x 24"W 8° Back, 2° Up, 19mm O.D. Cross Bar

GT model code G41200U. Model year from the product code suffix on GT's page (_20). Launch price: GT US page captured 2019-09, inside the model year.

No Mach One listed right now. Save a search in the app and get told when one appears.