The 2021 GT Air BMX Bike is an entry level model designed to teach and improve the freestyle technique of new riders. Equipped the Air with a 3-piece chromoly cranks a 25 x 9 gearing, a cassette rear hub, and the popular 20 x 2.3" and 20 x 2.2" tires.

Specifications:
Frame: GT Freestyle Design, High-Tensile Steel Tubes, Downtube Gusset
Fork: GT Freestyle Design, High-Tensile 2-Piece Steerer and Tapered Legs (31mm Offset)
Headset: External Threadless (1-1/8")
Stem: GT Top Load, Cold-Forged Cap (40mm Reach) (32mm Rise)
Bars: GT Freestyle 2-Piece Steel (8.375" Rise) (28" Wide) (3° Up) (11° Back)
Grips: GT Super Soft Single Compound (155mm)
Bar Ends: GT Removable Plugs
Cranks: GT Power Series Chromoly 3-Piece, Chromoly 8 Spline Spindle (170mm)
Bottom Bracket: American Loose Ball (19mm)
Pedals: GT Low Profile FS Platform, PP Material, Boron Axle
Chain: KMC Z410
Sprocket: GT Steel (25 Tooth)
Front Hub: Steel Body, Loose Ball Bearings (3/8" Heat Treated Axle)
Rear Hub: Steel Body, Loose Ball, Cassette (14mm Axle)
Driver: 9 Tooth
Front Rim: Alloy (Single Wall) (36 Hole)
Rear Rim: Alloy (Single Wall) (36 Hole)
Front Tire: Innova (20 x 2.3")
Rear Tire: Innova (20 x 2.2")
Seat: GT
Seat Post: Steel (25.4mm)
Seat Clamp: TBD
Lever: Alloy
Brakes: Aluminum U-Brake w/ Soft Compound Pad
Brake Mounts: Welded
Gyro Tabs: Drilled
Extras: N/A
Color: GT Yellow
Weight: TBD

Frame Geometry:
Toptube: 20"
Chainstays: 13.2"
Headtube Angle: 75°
Seattube Angle: 71°
Stand Over Height: TBD
Bottom Bracket Height: 11.8"