Velopedia Bicycle Archive
Compare Bicycles
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 2012 GT Air and 2008 GT Air.
- Data limitation
Only 2012 GT Air has enough published drivetrain data for gearing calculations.
Gearing comparison
Lower gears help on climbs. Higher gears suit higher speeds.
RPM
RPM = pedal turns per minute.
Ratio2.54:1
Speed unavailable: wheel or tire size is missing or unclear.
Gearing unavailable for this size.
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
2012 GT Air
2008 GT Air
Overview
Model Year
2012
2008
Brand
GT
GT
Model
Air
Air
Bicycle Type
BMX
BMX
Original MSRP
Not documented
$229.99
Colors
Bright Yellow, Satin Grey
Gray
Sizes
One Size
One size fits all
Weight
—
—
Frameset
Frame Construction
—
TIG-welded
Frame Material
Straight Guage Hi-Ten
GT BMX FS design
Fork
GT Hi-Ten
GT BMX design
Fork Material
—
Chromoly, unicrown crown
Drivetrain
Component Group
—
BMX
Crankset
GT 1-pc 165mm 33t
GT Forged 3pc.
Bottom Bracket
American BB
Steel, ball type
Cassette
Odyssey Cro-Mo 13t
—
Rear Cogs
—
1-speed, 16 teeth
Chain
KMC Z410
KMC Z410
Pedals
GT Expert Plastic
GT Jump design, resin
Brakes
Brakes
C-Star U-Brake
Tektro 907 U-brake brakes, Tektro 319AC levers
Cockpit & Contact Points
Headset
FSA External
1 1/8" TH
Handlebar
GT Freestyle
GT dirt/street Cr-mo
Handlebar Extensions
—
Not included
Stem
GT Freestyle
GT FS design
Saddle
GT Dirt Rail
GT freestyle
Seatpost
Steel 25.4 mm
Steel
Wheels & Tires
Hubs
steel steel
Front: Sealed mech, Rear: Sealed mech, freewheel
Rims
—
Mag
Front Tire
GT Dirt 2.125
20" GT Air Bags
Wheel Size
—
20" wheels
Historical specifications are presented as an archival reference. Components may have varied by market, size, or production run.