Velopedia Bicycle Archive
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Compare published geometry, gearing and specifications for up to three bicycles.
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1 of 2 bicycles
At a glance
Key differences
Supported differences are shown below. Data limitations are labeled separately.
- Data limitation
No geometry is recorded for 2006 GT Compe.
Gearing comparison
Lower gears help on climbs. Higher gears suit higher speeds.
RPM
RPM = pedal turns per minute.
Ratio2.63:1
Estimated speed at 90 RPMGear
Uses front tire 20×2.1; rear size isn’t listed.
Ratio2.63:1
Estimated speed at 90 RPMGear
Uses front tire 20×2.1; rear size isn’t listed.
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
2004 GT Compe
2006 GT Compe
Overview
Model Year
2004
2006
Brand
GT
GT
Model
Compe
Compe
Bicycle Type
Freestyle/jumping
Freestyle/jumping
Original MSRP
$209.99
$239.99
Colors
Red, Silver
80's.5 Blue, Yellow
Sizes
One
20" wheel
Weight
—
—
Frameset
Frame Construction
TIG-welded
TIG-welded
Frame Material
Chromoly seat tube/hi-tensile steel
GT FS design, cr-mo down tube
Fork
GT
'05 GT Freestyle design
Fork Material
Hi-tensile steel, unicrown crown
Cromo/Hi-Ten
Drivetrain
Component Group
—
BMX
Crankset
3-piece aluminum, 42 teeth
GT Tubular forged 3pc., 42 teeth
Bottom Bracket
Loose ball
Steel, ball type
BB Shell Width
American
—
Rear Cogs
1-speed, 16 teeth
1-speed, 16 teeth
Chain
KMC Z410, 1/2 x 1/8"
KMC Z410
Pedals
GT BMX Design Aluminum
'05 GT Dirt/Street platform design, aluminum body, cr-mo alxe
Brakes
Brakes
Tektro 907A U-brake brakes, Tektro 289A levers
Tektro, 907A, forged aluminum U-brake front/Tektro, 907AD, dual anchor bolts, forged aluminum U-brake rear brakes, Tektro, 319AC, aluminum levers
Cockpit & Contact Points
Headset
1 1/8" threadless Victor VP-A74F w/SST Oryg
1 1/8" Tange Seiki FATTY 22, extra deep cup engagement
Handlebar
GT 4-Piece
GT dirt/street bend, Hi-Ten, 7" rise
Stem
GT Piston
GT Johnson III design, cold forged aluminum
Saddle
GT Jr Jump, 9mm rails
'05 GT Jump design, guards front and rear, 9mm rails with brace, two piece
Seatpost
Aluminum, 25.4mm diameter
Aluminum, 25.4mm diameter
Wheels & Tires
Hubs
Steel, 14mm
Steel body, 14mm hi-carbon axle
Rims
Alex G303, 48-hole
Alex G303, aluminum, 48 hole, 31mm width, 48-hole
Spokes
Stainless steel, 14ga. (2.0mm) straight gauge
14ga. (2.0mm) Straight Gauge
Spoke Nipples
Brass nipples
Brass nipples
Front Tire
20 x 2.10" GT Air Bags
20 x 2.10" GT Air Bags
Wheel Size
20" wheels
20" wheels
Geometry · choose a size for each bicycle
Geometry size
—
Head-tube angle
73°
—
Seat-tube angle
68°
—
Chainstay / rear center
355.6 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.