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2025 GT

Mach One Pro

A 20″ aluminum frame bmx bike with rim brakes.
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Manufacturer Price

$360
FrameAluminum
SuspensionRigid
ForkSteel
Wheels20″ Aluminum
DrivetrainSingle-speed
BrakesRim
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Insights
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

16 mph

Mach One Pro

Highest gear

(descending)

Sizing
LG

3'11" +

🐐 Estimated

Rider Fit Notes

None yet.

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Price History
Geometry
Specs
Build
Frame

GT Mach One Race MK2, 6061 Alloy, Euro BB, Reverse Dropouts, V-Brakes, 1-1/8" Integrated H/T

ColorsYellow; Team Blue

Fork

GT BMX Race, Hi-Ten Steel 1 1/8" Steerer, Tapered Legs, 305mm A/C, 3/8" Dropouts

Bottom Bracket

Euro Sealed Bearing

Headset

1-1/8" Sealed Integrated (41.8 x 45)

Stem

GT Top Load, 50mm

Handlebar

GT Race, Steel, 8.25"H x 29"W, 3° Up, 11° Back

Saddle

Railed

Seatpost

Alloy, 27.2mm x 200mm

TypeRigid

Pedals

GT Low Profile FS Platform Design

Grips

GT Statement

Groupset
Crank

GT Power Series Tubular Cr-Mo 3pc. 175mm Arms, 19mm x 8T Splined Spindle, 110 BCD Steel Spider, GT 44T Steel Chainring

Cassette

16T Freewheel

Chain

KMC S1

Brakes

Alloy V-type

TypeRim

Brake Levers

Alloy V-type

Wheels
Rims

Alloy Single Wall, 36h

Spokes

Stainless Steel, 14g

Front Hub

Steel Body, 36H, 3/8" Axle

Rear Hub

Steel Flip Flop Thread-on Body, Freewheel, 36h, 3/8" Axle

Tires

Front: GT Wing 20 x 1.75", Rear: GT Wing 20 x 1.75"

Rider Notes
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First added October 25

Last updated May 30