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 2011 GT Air.
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.
Ratio2.54:1
Estimated speed at 90 RPMGear
Rear tire: 20×2.1.
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
2011 GT Air
Overview
Model Year
2012
2011
Brand
GT
GT
Model
Air
Air
Bicycle Type
BMX
BMX
Colors
Bright Yellow, Satin Grey
Black, Neon Orange
Sizes
One Size
—
Weight
—
—
Frameset
Frame Construction
—
Steel
Frame Material
Straight Guage Hi-Ten
CroMo
Fork
GT Hi-Ten
GT Dirt/Street
Drivetrain
Component Group
—
BMX Mix
Crankset
GT 1-pc 165mm 33t
Forged steel, 33T teeth
Bottom Bracket
American BB
Steel
Cassette
Odyssey Cro-Mo 13t
Dnp
Rear Cogs
—
13 teeth
Chain
KMC Z410
KMC Z510
Pedals
GT Expert Plastic
GT Jump design
Brakes
Brakes
C-Star U-Brake
—
Cockpit & Contact Points
Headset
FSA External
1 1/8" Threadless
Handlebar
GT Freestyle
GT dirt/street Cr-mo
Handlebar Extensions
—
Not included
Stem
GT Freestyle
GT freestyle drop
Saddle
GT Dirt Rail
GT Slim Mini Street
Seatpost
Steel 25.4 mm
Steel, 25.4mm diameter
Wheels & Tires
Hubs
steel steel
Steel
Rims
—
Alex G303, 32-hole/36-hole
Spokes
—
14ga. (2.0mm)
Spoke Nipples
—
Brass
Front Tire
GT Dirt 2.125
20 x 2.125" Kenda K-Rad
Rear Tire
—
20 x 2.1" Kenda Ko-Rolla
Wheel Size
—
20" wheels
Historical specifications are presented as an archival reference. Components may have varied by market, size, or production run.