GT Speed Series Mini 2023 - BMX Bike
Inspired by the Speed Series Pro models and featuring reverse rear dropouts for quick gear changes. Each model size is purpose designed and spec'd to be lightweight, offering maximum performance to meet each racers needs.
- Ideal for riders 4'6" & under.
- Speed Alloy Frame with Reverse Dropouts
- Speed Series Aero Double Wall rims
- Kenda Kompact Pro Race tires
Occasionally, without notice, manufacturers change product design and/or specifications.
| Frame | GT Speed Series MK7 Junior Race Design, 6061-T6 AL, Alloy Formed and Butted Speed Metal Tubes, Reverse Dropouts, Euro BB, 1" Integrated H/T |
| Fork | GT BMX Junior Race, 6061 AL 1" Steerer, 3/8" Dropouts |
| Headset | 1" Sealed Integrated (38.2 x 45) |
| Stem | GT Top Load, Cold Forged 1", 40mm |
| Bars | GT Speed Alloy 2"H x 22"W, 8° Back, 2° Up |
| Front Brake | Promax MV-87, 85mm Cold Forged AL Arms, Mini V-Type |
| Rear Brake | Promax MV-87, 85mm Cold Forged AL Arms, Mini V-Type |
| Brake Lever | Alloy V-type |
| Front Mech | Null |
| Rear Mech | Null |
| Shifters | Null |
| Speed | 1 |
| Rims | Alloy Double Wall, 28h |
| Front Hub | GT Speed Series, Alloy Sealed, 3/8" Female Allen Bolt |
| Rear Hub | GT Speed Series, Alloy Sealed 3/8" Female Allen Bolt Cassette |
| Spokes | Stainless Steel, 14g |
| Front Tyre | Kenda Kompact Pro Race 1-1/8" |
| Rear Tyre | Kenda Kompact Pro Race 1-1/8" |
| Seat Post | Integrated |
| Saddle | BOX Echelon |
| Chainset | GT Forged Alloy 2pc., 140mm Arms, 24mm Hollow/ Alloy Spindle, 38T AL CNC Chain Ring, Alloy Chain Ring Bolts |
| Bottom Bracket | EB24 Sealed Bearings |
| Chain | KMC Z1 Narrow, 3/32" |
| Cassette | 16T Cog |
| Pedals | GT Mini Platform |
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.
GT Speed Series Geometry
| PRO | XXL | XL | PRO | 24 |
| A Seat Tube Length | 9.1 | 9.1 | 9.1 | 10.6 |
| C Top Tube Actual | 21.75 | 21.25 | 20.75 | 21.75 |
| D Head Tube Angle | 74.0° | 74.0° | 74.0° | 73.0° |
| E Seat Tube Angle | 72.0° | 72.0° | 72.0° | 70.0° |
| G Head Tube Length | 5 | 5 | 5 | 5 |
| H Wheelbase | 37.9 | 38.5 | 37.9 | 39 |
| I Front Center | 24.2 | 23.66 | 23.1 | 23.5 |
| J Chain Stay Length | 15.43 | 14.92 | 14.92 | 15.43 |
| K BB Drop | -1.5 | -1.5 | -1.5 | o |
| L BB Height | 11.3 | 11.5 | 11.5 | 12 |
| M Fork Rake | 1.3 | 1.3 | 1.3 | 1.3 |
| EXPERT | XL | EXPERT | JR | MICROMINI |
| A Seat Tube Length | 8 | 7.9 | 7.9 | 7.6 7.9 |
| C Top Tube Actual | 20 | 19.5 | 18.5 | 16 17.5 |
| D Head Tube Angle | 73° | 73° | 73° | 72 73.0 |
| E Seat Tube Angle | 70° | 70° | 70.0° | 70 70 |
| G Head Tube Length | 4 | 4 | 4 | 4 4 |
| H Wheelbase | 35.8 | 35.3 | 33.8 | 30.5 32.7 |
| I Front Center | 22.4 | 21.7 | 20.66 | 18.1 19.6 |
| J Chain Stay Length | 13.62 | 13.62 | 13.19 | 12.13 13.9 |
| K BB Drop | -1.5 | -1 | -1 | -1.7 |
| L BB Height | 11.5 | 11 | 11.5 | 10.7 11.5 |
| M Fork Rake | 1.3 | 1.3 | 1.3 | 1.3 1.3 |
What size frame do I need if I am between sizes? - read here
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