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 2004 GT Performer and 2005 GT Performer.
Gearing comparison
Lower gears help on climbs. Higher gears suit higher speeds.
RPM
RPM = pedal turns per minute.
Ratio2.79:1
Estimated speed at 90 RPMGear
Uses front tire 20×2.1; rear size isn’t listed.
Ratio2.79:1
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 Performer
2005 GT Performer
Overview
Model Year
2004
2005
Brand
GT
GT
Model
Performer
Performer
Bicycle Type
Freestyle/jumping
Freestyle/jumping
Original MSRP
$249.99
$279.99
Colors
Blue, Yellow
Madness Black, Lambo Orange
Sizes
One
—
Weight
—
—
Frameset
Frame Construction
TIG-welded
TIG-welded
Frame Material
Chromoly main triangle/hi-tensile steel rear stays
Chromoly main triangle/hi-ten steel stays
Fork
GT
GT
Fork Material
Hi-tensile steel, unicrown crown
Chromoly, unicrown crown
Drivetrain
Crankset
GT 3-piece chromoly, 39 teeth
GT tubular chromoly, 39 teeth
Bottom Bracket
Three piece
—
BB Shell Width
American
—
Rear Cogs
1-speed, 14 teeth
1-speed, 14 teeth
Chain
KMC Z410, 1/2 x 1/8"
KMC Z410, 1/2 x 1/8"
Pedals
GT BMX Design Aluminum
Aluminum platform
Brakes
Brakes
Tektro 907A U-brake brakes, Tektro 289A levers
Tektro 907A U-brake front/Tektro 907AD rear brakes, Tektro 319AC levers
Cockpit & Contact Points
Headset
1 1/8" threadless Victor VP-A74F w/SST Oryg
1 1/8" threadless Tange Seiki Fatty 22
Handlebar
GT 4-Piece
Hi-tensile
Stem
GT Piston
GT Johnson III
Saddle
GT Jr Jump, 9mm rails
GT jump design
Seatpost
Aluminum, 25.4mm diameter
Aluminum micro-adjust
Wheels & Tires
Hubs
Aluminum, 14mm axle
Aluminum, 14mm axle
Rims
Alex G22, 48-hole
Alex G22
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
Historical specifications are presented as an archival reference. Components may have varied by market, size, or production run.