Size Guides

We are here to help you get the right sized BMX bike for your situation! With so many different bikes to choose from it can be quite daunting, but don't worry- It's easy! Just pick either Freestyle or Race, measure up your height and get cracking! If you have any questions shoot us an email at help@luxbmx.com

Which guide do you need?

Pick the guide that matches what you are shopping for. If you are between sizes or buying for someone who is still growing, email help@luxbmx.com with their height and we will tell you what we would put them on.

Complete bikes Freestyle bike sizing Street, park, dirt and kids bikes. Wheel size by rider height, then top tube. Complete bikes Race bike sizing Micro through to Pro XXXXL and cruiser, sized by class and rider height. Frames Frame sizing Buying a frame on its own? Top tube length is the number that decides the fit. Protective gear Helmet sizing Measured around the head, nothing to do with bike size.

20 inch BMX sizing

A 20 inch bike is the standard adult BMX and suits riders from about 147cm up. At this wheel size the top tube is what changes the fit, so pick that by height.

Rider heightWheel sizeTop tube
60 to 91cm12"12 to 12.5"
81 to 106cm14"14 to 14.5"
96 to 122cm16"16 to 16.5"
122 to 147cm18"18 to 18.5"
147 to 157cm20"19.75 to 20.25"
157 to 168cm20"20 to 20.5"
168 to 175cm20"20.25 to 20.75"
175 to 183cm20"20.5 to 21"
183 to 190cm and up20"20.75 to 21.5"
160cm and up22"21 to 22.25"
160cm and up24"21.75 to 22"
160cm and up26"22 to 23"

Sizes overlap on purpose, so personal preference comes into it. If you land in two bands, riding style breaks the tie: longer for flow, trails and transitions, shorter for technical street and park.

Read the full buying guide

BMX race bike sizing

Race frames are sized by class, and the class you ride is set by rider height rather than age.

SizeRider heightTop tube
Micro (18" wheels)Under 120cm16.25"
Mini (20" wheels)110 to 140cm17 to 18"
Junior120 to 150cm18.25 to 18.75"
Expert130 to 170cm19.5 to 19.75"
Expert XL145 to 170cm20 to 20.75"
Pro150 to 175cm20.25 to 20.75"
Pro XL165 to 180cm21 to 21.25"
Pro XXL170 to 185cm and up21.5 to 21.85"
Pro XXXL175cm and up22"
Pro XXXXL180cm and up22.5"
Cruiser (24" wheels)175cm and up21.5" and up

Heights overlap between classes on purpose. Where you land in two, a growing rider is usually better on the larger, and a rider who wants the bike to turn faster on the smaller. Some brands label the Pro size Pro L, with the same fit.

Read the full buying guide

Buying a part?
651 products
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The Inspyre Evo Disc Pro Cruiser Bike 2025 features sleek race geometry, black rims and handlebars, and thin tires. The Inspyre Evo Disc Pro Cruiser Bike 2025 boasts black handlebars and wheels, a central gear crank, and a small seat. Made from premium aluminium 6061-T6, it's ideal for BMX racing, set against a clean white backdrop.
Inspyre Evo Disc Pro Cruiser Bike 2025

$1,498.99 AUD

Cherry Red
21.85
The 2025 Inspyre Evo-C Disc Expert Bike, with silver frame, black handlebars, and tires, stands out on a white background, capturing the essence of BMX racing. The Inspyre Evo-C Disc Expert Bike 2025, in silver and black, features a sleek frame, handlebars, and two wheels—ideal for BMX racing enthusiasts.
Inspyre Evo-C Disc Expert Bike 2025

$2,099.99 AUD

Champagne
19.5
The Inspyre Evo Disc Expert XL Bike 2025 features a sleek frame ideal for BMX racing, paired with black tires and handlebars, and advanced hydraulic disc brakes for superior control. The Inspyre Evo Disc Expert XL 2025 is a striking red BMX designed for racing, featuring black wheels, a black seat, and front and rear brakes for precision control.
Inspyre Evo Disc Expert XL Bike 2025

$1,498.99 AUD

Cherry Red
20
The Inspyre Evo Disc Expert Bike 2025 boasts a stylish frame, black seat and handlebars, and race-ready large wheels. With optional hydraulic disc brakes, it ensures thrilling rides on any track. The Inspyre Evo Disc Expert Bike 2025 in red boasts a sleek frame with black handlebars and wheels, embodying the speed and agility typical of race bikes.
Inspyre Evo Disc Expert Bike 2025

$1,498.99 AUD

Cherry Red
19.5
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The Inspyre Evo-C Disc Expert XL Bike 2025 in silver, modeled after race bikes, features a sleek side view with black wheels, seat, and handlebars. It also boasts precise hydraulic disc brakes for improved control. The Inspyre Evo-C Disc Expert XL Bike 2025, a sleek silver BMX with black handlebars and tires, showcases its race design against a white background, featuring advanced hydraulic disc brakes for superior performance.
Inspyre Evo-C Disc Expert XL Bike 2025

$2,099.99 AUD

Champagne
20
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The Inspyre Evo Disc Junior Bike 2025 is a red BMX bike with race geometry, lightweight frame, and black handlebars and tires, showcased on a white background. The Inspyre Evo Disc Junior Bike 2025 is a red and black BMX bike with race geometry, featuring thin tires, a lightweight frame, and a single gear.
Inspyre Evo Disc Junior Bike 2025

$1,498.99 AUD

Cherry Red
18.75
The Inspyre Evo-C Disc Pro XL 2025, a silver BMX bike with race-winning geometry, features black tires and handlebars set against a white background. The 2025 Inspyre Evo-C Disc Pro XL Bike, featuring race-winning geometry, sports a BMX design with a beige frame, black handlebars, and black tires set against a pristine white background.
Inspyre Evo-C Disc Pro XL Bike 2025

$2,099.99 AUD

Champagne
21.25
The Inspyre Evo Disc Pro L Bike 2025 is a red BMX-inspired bike featuring a black seat, handlebars, and black tires accented with white lettering on the frame. Designed for performance with its race geometry, this model reflects the signature style of Inspyre EVO bikes. A red Inspyre Evo Disc Pro L Bike 2025, featuring black wheels and handlebars, boasts a sleek frame design and race geometry that echoes the style of its predecessor, the EVO series.
Inspyre Evo Disc Pro L Bike 2025

$1,498.99 AUD

Cherry Red
20.75
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A Federal CowBoyd Custom 20 Inch Bike in maroon with black handlebars and brown tires, showcasing an Odyssey design, displayed on a white background. The Federal CowBoyd Custom 20 Inch Bike, with its maroon frame, rugged brown tires from Federal, and sleek black seat, stands proudly on its white stand, ready for an adventurous ride.
Federal CowBoyd Custom 20 Inch Bike

$2,699.99 AUD

Matte Maroon
21
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Introducing the YOUNGBOYD Custom 18 Inch Bike: This maroon BMX bike showcases black handlebars and tires, complemented by a white seat and stand. Inspired by Boyd Hilder, it’s crafted for freestyle enthusiasts who value both performance and style. The Federal YUNGBOYD Custom 18 Inch Bike, featuring a red frame with a beige seat, black handlebars, and thick black tires, leans against a white stand, highlighting its freestyle custom design.
Federal YUNGBOYD Custom 18 Inch Bike

$2,199.99 AUD

Matte Maroon
19
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Fly Bikes Dove 20 Inch Bike (Long) / Gloss Black Fly Bikes Dove 20 Inch Bike (Long) / Gloss White
Fly Bikes Dove 20 Inch Bike (Long)

$2,209.99 AUD

Gloss Black
Gloss White
20.5 - Left Hand Drive20.5 - Right Hand Drive21 - Left Hand Drive21 - Right Hand Drive21.5 - Left Hand Drive21.5 - Right Hand Drive
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Fly Bikes Dove 20 Inch Bike (Short) / Gloss Black Fly Bikes Dove 20 Inch Bike (Short) / Gloss White
Fly Bikes Dove 20 Inch Bike (Short)

$2,209.99 AUD

Gloss Black
Gloss White
20.5 - Left Hand Drive20.5 - Right Hand Drive21.5 - Left Hand Drive21.5 - Right Hand Drive21 - Left Hand Drive21 - Right Hand Drive
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Fly Bikes Omega FC 20 Inch Bike / Dried Thyme Fly Bikes Omega FC 20 Inch Bike / Flat Black
Fly Bikes Omega FC 20 Inch Bike

$1,529.99 AUD

Dried Thyme
Flat Black
Right Hand Drive - 21Left Hand Drive - 21
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Fly Bikes Omega Cassette 20 Inch Bike / Dried Thyme Fly Bikes Omega Cassette 20 Inch Bike / Flat Black
Fly Bikes Omega Cassette 20 Inch Bike

$1,439.99 AUD

Dried Thyme
Flat Black
Right Hand Drive - 21Left Hand Drive - 21
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Fly Bikes Sion 20 Inch Bike / Gloss Dark Red Fly Bikes Sion 20 Inch Bike / Gloss Black
Fly Bikes Sion 20 Inch Bike

$1,269.99 AUD

Gloss Dark Red
Gloss Black
Right Hand Drive - 21Left Hand Drive - 21
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The Fly Bikes Proton FC 20 Inch Bike, in black, showcases a CrMo frame, thick tires, handlebars with grips, and a padded seat against a white background. The Fly Bikes Proton FC 20 Inch Bike features a red BMX design with a durable CrMo frame, black handlebars, detailed frame accents, and fat tires set against a white background.
Fly Bikes Proton FC 20 Inch Bike

$1,189.99 AUD

Flat Red
Gloss Black
Right Hand Drive - 21Left Hand Drive - 21
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Fly Bikes Nova 18 Inch Bike / Flat Black
Fly Bikes Nova 18 Inch Bike

$829.99 AUD

Flat Black
Right Hand Drive - 17.5Left Hand Drive - 17.5
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Fly Bikes Supernova 18 Inch Bike / Gloss Black Fly Bikes Supernova 18 Inch Bike / Flat Red
Fly Bikes Supernova 18 Inch Bike

$1,099.99 AUD

Gloss Black
Flat Red
Right Hand Drive - 17.5Left Hand Drive - 17.5
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Fly Bikes Neo 16 Inch Bike / Flat Black Fly Bikes Neo 16 Inch Bike / Metallic Red
Fly Bikes Neo 16 Inch Bike

$809.99 AUD

Flat Black
Metallic Red
16
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The Meybo 2025 Superclass Pro Cruiser is a silver BMX racing bike with black tires, an orange logo, sleek design featuring a straight handlebar and standard seat. It excels in performance and boasts Shimano hydraulic disc brakes for superior control.
Meybo 2025 Superclass Pro Cruiser Bike

$2,239.99 AUD

Grey/Orange
21
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Meybo 2025 Superclass Pro XL Cruiser Bike

$2,239.99 AUD

22.25
Sold out
The Meybo 2025 Superclass Pro XL Bike is a silver BMX with SD carbon forks, black wheels, and an orange "MB-80" logo. Its side view showcases a sleek design enhanced by Shimano hydraulic disc brakes for top-notch performance.
Meybo 2025 Superclass Pro XL Bike

$2,239.99 AUD

Grey/Orange
21
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The Meybo 2025 Superclass Expert XL Bike is a sleek silver BMX racing bike with black handlebars, saddle, and wheels. It features bold orange branding on the frame and SD carbon forks for superior performance, designed for ultimate speed and agility.
Meybo 2025 Superclass Expert XL Bike

$2,239.99 AUD

Grey/Orange
20.7
Sold out
The Meybo 2025 Superclass Expert Bike is a silver BMX racing bike with black tires, an orange "MAYBO" logo on the frame, and SD carbon forks for top performance, showcased against a white background.
Meybo 2025 Superclass Expert Bike

$2,239.99 AUD

Grey/Orange
19.7

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