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2011 GT Mach One Jr CB

Launched at $175

Own a 2011 GT Mach One Jr CB?

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

What a used one is worth

Open the value tool

New

$42

$22 to $57

Like new

$40

$21 to $54

Excellent

$38

$20 to $51

Good

$32

$17 to $43

Fair

$23

$12 to $31

For parts

$13

$7 to $17

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

Overview

Brand
GT
Model family
Mach One
Model year
2011
Category
BMX · race
Frame material
steel
Sizes
16" WHEEL / 15.5" TOP TUBE
Wheel size
16
Launch MSRP (US)
$175

Drivetrain

Speeds
1
Chainrings
1
Electronic
false
Total gears
1

Build

Fork
GT BMX design, 1" threaded steer, 1-1/8" OD blades
Stem
4-Bolt Alloy Top, Steel Quill
Tires
GT Wing design, 16x2.125" (f&r)
Brakes
front: Alloy Side-Pull Caliper; rear: hub type; levers: Alloy / Resin
Saddle
GT Jr. BMX design, padded with 7mm rails
Wheels
rims: Alloy, 28 Hole; front hub: Steel, 28 hole, 3/8" axle; rear hub: Coaster brake, 28 hole, 16T cog; spokes: 14G
Cassette
18 tooth for CB
Crankset
Forged 1-piece type, 114mm/ `06 design GT steel, 32T
Seatpost
Steel, 25.4mm O.D.
Handlebar
GT BMX design, Hi-Ten, 5.7" Rise

Spec from GT's official 2011 catalog (PDF), specification chart on PDF page 151, column "MACH ONE JR CB"; the catalog prints no prices. Fix round 2026-10-21: every row of this column re-read with a third reader (pdftotext -table, which keeps each row label level with its cells); values that the earlier two reader pass merged with a neighbouring column or dropped are now as printed. Frame: GT BMX dirt jump styling, Hi-Ten steel Bottom bracket: Steel, Ball Type Chain: KMC Z410 Headset: Steel, 1" Pedals: Jr. BMX Design, Resin Grips: GT Wing Waffle Design Seat clamp: Alloy, GT Wing logo Extras: Training Wheels, Pad Set Nipples: Brass MSRP $175 read from the product's own price block (under the model name) on GT's 2011 site product page "Mach One Junior - Black" (GT's 2011 site names it "Mach One Junior"; its spec table matches this chart column), captured 2011-05, inside the 2011 launch window (fix round 2026-10-21).

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