GT Air 20w 2019 - BMX Bike
- 20” top tube frame with 75º head angle and 13.2” CS
- 8.375”h x 28”w GT 2pc handlebars
- GT topload stem
- 2.4” & 2.3” Innova FS tyres
Occasionally, without notice, manufacturers change product design and/or specifications.
| Frame | GT FS Design, Hi-Ten Steel Tubes, DT Gusset, American BB, Seat Stay Mounted U-Brake, External 1-1/8" H/T, w/ Removable Rotor Tabs, Odyssey Springfield Brake compatible |
| Fork | GT FS Design, Hi-Ten 2pc. Steerer & Tapered Legs, 31mm OffSet, 3/8" Axle Dropouts |
| Headset | 1-1/8" Threadless, Steel |
| Stem | GT Top Load, 1-1/8", Cold Forged Cap, 32mm Rise, 40mm Length |
| Bars | GT Freestyle 2pc., Steel, 8.375"H x 28"W, 3°Up, 11° sweep |
| Rear Brake | Aluminum U-Brake w/ Soft Compound Pad |
| Brake Lever | ALLOY |
| Speed | 1 |
| Rims | Alloy single wall, 20" 36h |
| Front Hub | Steel Body, Loose Ball 3/8" x 150mm Heat Treated Axle, 36 Hole, 15mm Nut |
| Rear Hub | Steel Body, Loose Ball, 14mm Adapter x 180mm Axle, 9T Cassette, 36 Hole, 17mm Nut |
| Spokes | Stainless Steel, 14g |
| Front Tyre | Innova, 20 x 2.3" |
| Rear Tyre | Innova, 20 x 2.2" |
| Seat Post | Steel, 25.4 x 200mm |
| Chainset | GT Power Series Cr-Mo 170mm 3Pc. 19mm x 8T Cr-Mo Spindle, GT 25T Steel Chainwheel |
| Bottom Bracket | American Loose Ball Bearing |
| Chain | KMC Z410 |
| Cassette | 9T Cassette |
| Pedals | GT Low Profile FS Platform Design, PP Material, Boron Axle |
BMX Size guide
Kids BMX Size Chart
|
Rider Height |
BMX |
||
|
Feet & Inches |
Centimetres |
Approximate Age |
Wheel Size |
|
3'7" - 4'0" |
110cm - 122cm |
5 - 7 years |
16" |
|
4'0" - 4'10" |
122cm - 147cm |
7 - 11 years |
18" |
|
4'10" - 6'4" |
147cm - 193cm |
11+ years |
20" |
Adult BMX Size chart
20” BMX bikes can be sized on top tube length. A taller rider will suit a longer top tube. Though some riders might wish to experiment with top tube length to suit different riding styles, below is a suggestion.
|
Rider Height |
Top tube length |
|
5’0” – 5’5” (152 – 165cm) |
20” – 20.5” |
|
5’5” – 5’10” (165 – 178cm) |
20.75” |
|
5’10 – 6’0”+ (178 – 183cm+) |
21”+ |
Cruiser BMX Sizing
BMX Bikes with wheels larger than 24” are known as cruisers and will suit riders taller than 5’0” 152cm.
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