Velopedia Bicycle Archive

2001 GT Mach One

Original specifications: 20" wheels.

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At a glance

Archive #35525

Model year: 2001
Category: BMX
Original MSRP: $329.99
Sizes: Pro
Colors: Chrome-Plated, Gloss Black/Bright Yellow, Gloss Black/Liquid Blue
In this record: 23 specifications · archived image · original MSRP

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Identification clues

2001 archived details

Published colors: Chrome-Plated, Gloss Black/Bright Yellow, Gloss Black/Liquid Blue
Frame: 4130 chromoly
Original equipment: N/A

Clues, not proof of model year. Colors vary and components may have been replaced.

Original build4130 chromoly · 20" wheels

Manufacturer catalog

Published sizes and colors

1 size · 3 colors

Manufacturer-published sizes and colors; availability and exact size/color pairings may vary by market or production run.

Published sizes

Pro

Published colors

Chrome-PlatedGloss Black/Bright YellowGloss Black/Liquid Blue

Frameset

Frame Construction	TIG-welded
Frame Material	4130 chromoly
Fork	GT
Fork Material	Chromoly, unicrown crown

Drivetrain

Crankset	GT 3-piece chromoly, 44 teeth
Bottom Bracket	GT one piece
Rear Cogs	1-speed, 16 teeth
Chain	KMC, 1/2 x 3/32"
Pedals	GT aluminum platform

Brakes

Brakes	ProMax MX 2.0 V-Brake rear brakes, ProMax MX 1.0 V-Brake rear levers

Cockpit & Contact Points

Headset	1 1/8" threadless Aheadset
Handlebar	GT Expert BMX
Handlebar Extensions	Not included
Stem	GT Piston
Saddle	GT
Seatpost	GT aluminum micro-adjust, 26.0mm diameter

Wheels & Tires

Hubs	GT 2000
Rims	Alex 7X, 36-hole
Spokes	14g
Spoke Nipples	Brass nipples
Front Tire	20 x 2.125" GT Brody
Rear Tire	20 x 1.75" GT Brody
Wheel Size	20" wheels

Gearing

Lower gears help on climbs. Higher gears suit higher speeds.

Pedal cadence

RPM

Speed units

RPM = pedal turns per minute.

Published build44T · 16T · 1-speed

Ratio2.75:1

Estimated speed At 90 RPM Gear14.4 mph

Rear tire: 20×1.75.

How it works

Ratio = front teeth ÷ rear teeth. Hub gears also include the hub’s internal ratio. A 400% range means the highest ratio is four times the lowest.

Speeds are estimates from tire size and pedal cadence. Actual speeds vary.

Try other gearing

Try your current gearingChanged tires or gears? Calculate your setup.

Your changes apply to this calculation. The archived build stays unchanged.

Gears Drivetrain

Front teeth Smallest rear teeth Largest rear teeth

Use up to three front tooth counts, separated by /. For one rear sprocket, enter the same count twice.

Rear tire

Rear tire marking

Apply the marking on your rear tire or edit its dimensions below. Older or fractional inch sizes need the ISO marking (e.g. 37-590).

Rim diameter (BSD, mm) Tire width (mm)

For 32-622, width is 32 mm and rim diameter is 622 mm. Use the rear tire on mixed-wheel bikes. Leave both fields empty to compare ratios only.

Cadence (RPM) Speed units

Gear, dimension and cadence changes update results automatically.

Gearing comparison
Measure	Original	Your setup
Lowest ratio	—	—
Highest ratio	—	—
Total range	—	—
Lowest-gear speed	—	—
Highest-gear speed	—	—

Speeds are estimates. These calculations do not establish component compatibility or available tire clearance.

Parts & serviceability

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Original specifications

Brake pads · Original

ProMax MX 2.0 V-Brake rear brakes

ProMax MX 1.0 V-Brake rear levers

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Seatpost · Original

GT aluminum micro-adjust

26.0mm diameter

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Rims · Original

Alex 7X

36-hole

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Based on the original build. Check fit and installed parts before ordering. Affiliate links may earn Velopedia a commission. As an Amazon Associate I earn from qualifying purchases.

Parts and service referenceQuick reference before buying parts

Archived specifications for reference. Check the fitted parts before ordering.

Front tire: Front: 20 x 2.125" GT Brody, Rear: 20 x 1.75" GT Brody
Drivetrain: 1-speed
Seatpost diameter: 26 mm
Bottom bracket / shell: GT one piece

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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.

2001 GT Mach One