- Frame
- 4130 chromoly
- Brakes
- Lee Chi linear-pull rear brakes, Lee Chi ProMax rear levers
Velopedia Bicycle Archive
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Compare published geometry, gearing and specifications for up to three bicycles.
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At a glance
Key differences
Supported differences are shown below. Data limitations are labeled separately.
- Data limitation
No geometry is recorded for 1997 GT Mach One.
Gearing comparison
Lower gears help on climbs. Higher gears suit higher speeds.
RPM
RPM = pedal turns per minute.
Ratio2.75:1
Estimated speed at 90 RPMGear
Rear tire: 20×1.75.
Ratio2.75:1
Estimated speed at 90 RPMGear
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.
Complete specification tableShows different published values and gaps where a bicycle lacks data. Different wording reflects source language, not necessarily different components. Swipe for more columns.
Specification
2000 GT Mach One
1997 GT Mach One
Overview
Model Year
2000
1997
Brand
GT
GT
Model
Mach One
Mach One
Bicycle Type
BMX
BMX
Original MSRP
$315.00
$355.99
Colors
Black/Glitter Orange, Chrome-Plated, Hot Rod Blue
Black, Blue, Chrome-Plated
Sizes
—
Boys
Weight
—
—
Frameset
Frame Construction
TIG-welded
TIG-welded
Frame Material
4130 chromoly
Chromoly
Fork
GT
GT
Fork Material
Chromoly, unicrown crown
Chromoly, unicrown crown
Drivetrain
Crankset
GT 3-piece chromoly, 44 teeth
GT Power Series 1-piece chromoly, 44 teeth
Bottom Bracket
Three piece, sealed
One piece
BB Shell Width
—
68mm Threadless
Rear Cogs
1-speed, 16 teeth
1-speed, 16 teeth
Chain
KMC, 1/2 x 3/32"
KMC 410, 1/2 x 3/32"
Pedals
GT aluminum platform
GT aluminum platforms
Brakes
Brakes
Lee Chi linear-pull rear brakes, Lee Chi ProMax rear levers
Tektro 875A V-brake rear brakes, aluminum levers
Cockpit & Contact Points
Headset
1 1/8" threadless Aheadset SX-1
1 1/8" threadless steel
Handlebar
GT
GT Expert chromoly
Handlebar Extensions
Not included
—
Stem
GT Piston
GT aluminum
Saddle
GT
GT Drop Nose
Seatpost
GT aluminum micro-adjust, 26.0mm diameter
Chromoly micro-adjust
Wheels & Tires
Hubs
GT 2000
GT Mohawk
Rims
Weinmann ZAC-X, 36-hole
Weinmann 4019, 36-hole
Spokes
2.0mm
Steel, 2.0mm straight gauge
Spoke Nipples
Brass nipples
Brass nipples
Front Tire
20 x 2.125" GT Brody
20 x 2.125" GT AA Pro
Rear Tire
20 x 1.75" GT Brody
20 x 1.75" GT AA Pro
Wheel Size
20" wheels
20" wheels
Geometry · choose a size for each bicycle
Geometry size
—
Head-tube angle
73°
—
Seat-tube angle
70°
—
Chainstay / rear center
357.9 mm
—
Wheelbase
935.7 mm
—
Historical specifications are presented as an archival reference. Components may have varied by market, size, or production run. Legacy reference geometry is model-level historical data whose corresponding frame size is not identified; compare those dimensions as reference values rather than size-normalized fit data.