GT Speed Series Pro XXL 2023 - BMX Bike
Occasionally, without notice, manufacturers change product design and/or specifications.
Frame | GT Speed Series MK7 Elite Race, 6061-T6 AL, Alloy Formed and Butted Speed Metal Tubes, AL CNC/Forged Quick Change Disc Dropout SyStem, BB86, Taper 1-1/8-1-1/2" Integrated H/T |
Fork | GT BMX Pro Race, 100% Cr-Mo 1 1/8" Steerer, Tapered Legs, 3/8" Dropouts |
Headset | 1-1/8-1.5" Taper Sealed Integrated, (45) |
Stem | Promax Impact Top Load, 53mm |
Bars | GT Speed Cr-Mo 8.375"H x 29"W, 8° Sweep, 4° Up, Taper Cross Bar |
Front Brake | Hydro Disc Rear, 140mm Rotor (Rear Only) |
Rear Brake | Hydro Disc Rear, 140mm Rotor (Rear Only) |
Brake Lever | Alloy, 2 Finger |
Front Mech | Null |
Rear Mech | Null |
Shifters | Null |
Speed | 1 |
Rims | Alloy Double Wall, 36h |
Front Hub | GT Speed Series, Alloy Sealed, 3/8" Female Allen Bolt |
Rear Hub | GT Speed Series, Alloy Sealed, 6 Pawl 72point Alloy Cassette Body, 3/8" Female Allen Bolt Cassette |
Spokes | Stainless Steel, 14g |
Front Tyre | Kenda Kompact Pro Race 1.75" |
Rear Tyre | Kenda Kompact Pro Race 1.75" |
Seat Post | Integrated |
Saddle | BOX Echelon |
Chainset | GT Forged Alloy 2pc., 175mm Arms, 24mm Hollow/ Cr-Mo Spindle, 44T AL CNC Chain Ring, Alloy Chain Ring Bolts |
Bottom Bracket | BB86 Sealed Bearings |
Chain | KMC Z1 Narrow, 3/32" |
Cassette | 16T Cog |
Pedals | GT Logo PC 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
Customer reviews and Q&A's are disabled because you declined functional cookies.
To enable reviews and Q&A's click the 'Cookie Settings' button below and enable functional cookies.
GT Speed Series Pro XXL 2023 - BMX Bike
Available with supplier
- usually built & despatched in 3-4 working daysCycle to Work is a salary sacrifice scheme, where you can save up to 42% off a new Bike and Safety equipment. This means the cost is deducted from your salary as a non-cash benefit, so you save on tax and national insurance.
Here at Tredz, we accept Cycle to Work vouchers from all national schemes. For more information click here.
At Tredz we make finance easy. You can choose from a range of flexible finance repayments from 6 months up to 48 months, choose to place a deposit and pay the balance on finance. Go with a 0% APR finance deal with absolutely no interest on payments, or a 9.9% APR Buy Now Pay later option with a choice of 12 or 24 deferred payment options, or a longer-term 14.9% APR option with lower monthly payments. For more information click here.
At Tredz, we’re committed to bringing you the best products at the best prices. If you find a product cheaper elsewhere, simply contact us for an immediate response using our live chat service. Click here to discuss your price match with an agent now for help.
Subject to Terms and Conditions
At Tredz, we offer a fast high quality service, with a range of options from free delivery on orders over £30, next day and convenient click & collect from one of our stores. Simply select within the checkout.
*Courier deliveries to Northern Ireland, Isle of Man, Isle of Wight, Channel Islands and the Scottish Highlands/Islands will incur a charge.At Tredz, if you are not 100% happy with your order, then you can use our simple hassle free returns service. Simply return the item new and unused in the manufacturers original packaging within 365 days of purchase. Bikes and larger items are collected by courier.
When you receive your bike, all you'll need to do is unpack it, attach the pedals, turn the handlebars and ride.
To help you get started we have put together a handy Bike Building Guide, click here.