Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
GT
2021 GT Air
Previous used estimate
$161 - $166
Actual value depends on condition, size, and local demand.
Value Guide market data · 2021 GT Air
12-month projected trend
9%
Direction and magnitude, not judgment
vs. category average
5%
Holds value better than category avg
Price over time - 2021 GT Air
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Air model years
Compare Air models
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Overview
About this bike
At home in the neighborhood or the skatepark, the Air is the perfect first bike. The frame geometry is quick responsive allowing the bike to handle easier as the young rider builds up their strength. Spec'd with a 25T sprocket, a 9T cassette rear hub, and large volume tires, the Air lets the rider fit in with their friends without a high price tag.
Specifications
- Subtype
- BMX
- Category
- BMX
- Component Fork
- GT FS Design, Hi-Ten 2pc. Steerer & Tapered Legs, 31mm OffSet, 3/8" Axle Dropouts
- Component Size
- 20-inch
- Component Stem
- GT Top Load, 1-1/8", Cold Forged Cap, 32mm Rise, 40mm
- Product Family
- Air
- Component Chain
- KMC Z410
- Component Color
- Gloss GT Yellow/Black & Orange, Gloss Trans Black/Aqua Blue & Red
- Component Frame
- Hi-Ten Steel Tubes, DT Gusset, American BB, Seat Stay U-Brake, 1-1/8" H/T, w/ Removable Rotor Tabs
- Component Brakes
- Aluminum U-Brake w/ Soft Compound Pad
- Component Pedals
- GT Low Profile FS Platform Design
- Component Saddle
- Railed
- Component Headset
- 1-1/8" Threadless, Steel
- Component Crankset
- GT Power Series Cr-Mo 3pc., 170mm Arms, 19mm x 8T Cr-Mo Spindle, GT 25T Steel Chainwheel
- Component Seat Post
- Alloy, 25.4mm x 200mm
- Component Chainrings
- 25T
- Component Handlebars
- GT Freestyle 2pc., Steel, 8.375"H x 28"W, 3° Up, 11° Back
- Component Tape Grips
- GT Super Soft Flanged 155mm Single Compound w/ GT Removable Plug
- Component Bottom Bracket
- American Loose Ball Bearing
- Crankset
- GT Power Series Cr-Mo 3pc., 170mm Arms, 19mm x 8T Cr-Mo Spindle, GT 25T Steel Chainwheel
- Pedals
- GT Low Profile FS Platform Design
- Bottom Bracket
- American Loose Ball Bearing
- Chain
- KMC Z410
- Saddle
- Railed
- Headset
- 1-1/8" Threadless, Steel
- Stem
- GT Top Load, 1-1/8", Cold Forged Cap, 32mm Rise, 40mm
- Brakes
- Aluminum U-Brake w/ Soft Compound Pad
- Chainrings
- 25T
- Fork
- GT FS Design, Hi-Ten 2pc. Steerer & Tapered Legs, 31mm OffSet, 3/8" Axle Dropouts
- Frame
- Hi-Ten Steel Tubes, DT Gusset, American BB, Seat Stay U-Brake, 1-1/8" H/T, w/ Removable Rotor Tabs
- Handlebars
- GT Freestyle 2pc., Steel, 8.375"H x 28"W, 3° Up, 11° Back
- Seat Post
- Alloy, 25.4mm x 200mm
- Tape/Grips
- GT Super Soft Flanged 155mm Single Compound w/ GT Removable Plug
- Color
- Gloss Trans Black/Aqua Blue & Red
- Size
- 20-inch
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Service history
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.