GT Mach One Junior 2023 - BMX Bike
Entry to BMX Racing shouldn’t cost an arm and a leg. The Mach One Junior is made to fit riders 4'4"-4'10".
Key Features:
- GT Top Load Stem
- Hi-Ten Steel Fork
- Influence by Speed alloy frame with reverse dropouts
Occasionally, without notice, manufacturers change product design and/or specifications.
Frame | GT Mach One Race MK2, 6061 Alloy, Euro BB, Reverse Dropouts, V-Brakes, 1-1/8" Integrated H/T |
Fork | GT BMX Race, Hi-Ten Steel 1" Steerer, 3/8" Dropouts |
Headset | 1 1/8" Integrated Design, 45X45 Degree Sealed Bearings |
Stem | GT Top Load, 1", 40mm |
Bars | GT Race, Steel, 4"H x 24"w/ 8° Back, 2° Up, 19mm O.D. Cross Bar |
Front Brake | Alloy V-type |
Rear Brake | Alloy V-type |
Brake Lever | Alloy V-type |
Speed | 1 |
Rims | Alloy Double Wall, 28h |
Front Hub | Steel Body, 28h, 3/8" Axle |
Rear Hub | Steel Flip Flop Thread-on Body, Freewheel, 28h, 3/8" Axle |
Spokes | Stainless Steel, 14g |
Front Tyre | Kenda Race, 20 x 1-3/8" |
Rear Tyre | Kenda Race, 20 x 1-3/8" |
Seat Post | 22.2 Integrated |
Saddle | GT Uni Mini Padded |
Chainset | GT Alloy Forged 3pc, 152mm, Square Taper, 38T |
Bottom Bracket | Threaded Square Type |
Chain | KMC S1 |
Cassette | 16T Freewheel |
Pedals | GT Mini Size Platform, PP Material |
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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