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 Colony Horizon 18 Inch Bike features a lightweight purple alloy frame, black handlebars, seat, and tires, shown from the side against a white background. The Colony Horizon 18 Inch Bike is a BMX Freestyle model with a lightweight alloy frame, black seat, handlebars, and tires, displayed in profile view against a white background.
Colony Horizon 18 Inch Bike

$699.99 AUD

Clear Polished (Raw)
Clear Navy (Blue)
Clear Pink
Orange
Polished
Clear Black
Clear Purple
Pink Aqua Fade
17.9
The Cult Juvi 14 Inch Bike, featuring a black frame, thick tires, padded seat, and straight handlebars, is shown against a plain white background. A black kids premium BMX with thick tires, a padded seat, and a "Cult" logo on the frame. This Cult Juvi 14 Inch Bike is showcased against a plain white background.
Cult Juvi 14 Inch Bike

$799.99 AUD

All Black
White
Matte Black
Matte Pink
14.5
Wethepeople Crysis 20 Inch Bike - Matt Black A gold and black Wethepeople Crysis 20 Inch Bike with a straight handlebar, 4130 Chromoly frame, black seat, and thick tires is shown on a white background—ideal for BMX riders seeking top performance.
Wethepeople Crysis 20 Inch Bike
$1,299.99 AUD
Matt Black
Midnight Green
Metallic Champagne
Secret Red Metallic
20.521
Sold out
Cult Devotion 20 Inch Bike (2022) / Black / 21TT Cult Devotion 20 Inch Bike (2022) / Cavalry Blue / 21TT
Cult Devotion 20 Inch Bike
$1,199.99 AUD
Panza White
Cavalry Blue
Matte Black
21
The Division Reark 20 Inch Bike is a black BMX with thick tires, lightweight Hi-Tensile steel frame, padded seat, straight handlebars, rear pegs, and sealed bottom bracket—shown in profile against a white background. The Division Reark 20 Inch Bike is a yellow BMX featuring black handlebars, seat, and tires, displayed from the side on a white background. Built with Hi-Tensile steel for enhanced durability, it includes 3-piece cranks to ensure a smooth ride.
Division Reark 20 Inch Bike
$549.99 AUD
Gloss Black
Yellow
Navy Blue
Silver
Orange
Metal Copper
19.5TT19.520
Sold out
DK Aura 20 Bike / Black / 20TT DK Aura 20 Bike / Ocean / 20TT
DK Aura 20 Inch Bike

$528.99 AUD

Black
Ocean
20
Sold out
Forgotten Rascal Balance Bike / Gloss Neon Orange / 12.5TT Forgotten Rascal Balance Bike / Gloss Neon Green / 12.5TT
Forgotten Rascal Balance Bike

$249.99 AUD

Gloss Neon Green
Smoke Grey
Gloss Neon Orange
12.5
The Radio Dice 18 Inch Bike features a black compact frame, Salt Tracer Tyres, and a straight handlebar, displayed in side profile against a white background. Radio Dice 18 Inch Bike with green frame, black seat and handlebars, and Salt Tracer Tyres, shown on a white background.
Radio Dice 18 Inch Bike

$749.99 AUD

Matt Black
Candy Red
Black
Metallic Cyan
Black/White
Laguna Green Metallic
18
Sold out
Forgotten Thrasher 18 Inch Bike / Gloss Neon Pink / 17.9TT Forgotten Thrasher 18 Inch Bike / Smoke Grey / 17.9TT
Forgotten Thrasher 18 Inch Bike

$598.99 AUD

Gloss Neon Pink
Smoke Grey
17.9
Radio Revo 16 Bike / Black / 15.75TT Radio Revo 16 Bike / Surf Blue / 15.75TT
Radio Revo 16 Inch Bike

$599.99 AUD

Surf Blue
Black
Black/Orange
Green Breeze
15.7516
Sold out
Kids Kink Roaster 12 Inch BMX bike with black tires and seat, featuring a high-gloss frame and visible brand logos on the body.
Kink Roaster 12 Inch Bike (2023)

$419.99 AUD

Gloss Digital Green
12.5
A Radio Saiko 18 Inch Bike in red with black tires, pedals, and handlebars is displayed in a side view on a white background. The Radio Saiko 18 Inch Bike is a black BMX kids bike featuring teal rims, a padded seat, and standard handlebars, shown against a white background.
Radio Saiko 18 Inch Bike
$699.99 AUD
Black
Purple
Black/Red
Mint
Urban Grey Metallic
Deep Red Metallic
18
Save $79.00
The Kink Roaster 12 Inch Bike (2026) features a brown metallic frame, black seat, and black tires, making it an ideal first BMX bike for kids. The Kink Roaster 12 Inch Bike (2026), ideal as a child's first BMX, boasts a bronze frame, black seat and wheels. It's set against a dark brick wall background and includes a reliable coaster brake for safe stopping.
Kink Roaster 12 Inch Bike (2026)

$399.99 AUD

$478.99 AUD

Astro Red
12.5
Save $300.00
Redline MXII Retro 20 Inch Bike / Black Redline MXII Retro 20 Inch Bike / Blue
Redline MXII Retro 20 Inch Bike

$999.99 AUD

$1,199.99 AUD

Black
Blue
Red
21
The Division Blitzer 12 Inch Bike is a small purple kids BMX with black tires, padded seat, and white "Blitzer" branding on the frame—ideal as a first BMX bike for young riders. The Division Blitzer 12 Inch Bike is a small black BMX with thick tires and bold white "BLITZER" branding on the frame, shown in profile against a white background. Ideal for kids and beginner or aspiring freestyle BMX riders.
Division Blitzer 12 Inch Bike

$449.99 AUD

Black
Metal Purple
11.912
The Colony Horizon 14 Inch Bike is a small purple BMX with black handlebars, seat, and tires, featuring a lightweight alloy frame, shown against a white background. The Colony Horizon 14 Inch Bike features a lightweight alloy frame, black seat, black tires, and straight handlebars, shown on a white background. This model offers durability and style in a compact BMX design.
Colony Horizon 14 Inch Bike

$699.99 AUD

Orange
Clear Polished (Raw)
Clear Navy (Blue)
Clear Pink
Polished
Clear Purple
Clear Black
Pink Aqua Fade
13.913.9TT
The Wethepeople Prime 12 Inch Balance Bike is a small black BMX-style balance bike with no pedals, featuring a padded seat, thick tires, and "WETHEPEOPLE" branding on the frame. The Wethepeople Prime 12 Inch Balance Bike is a small turquoise model with black tires, handlebars, and seat, displayed on a white background.
Wethepeople Prime 12 Inch Balance Bike

$549.99 AUD

Black
Teal Blue
Mango Yellow
Turbo Blue
Metallic Mint
12.2
Sold out
Division Brookside 20in Bike / Black/Polished / 20.5TT Division Brookside 20in Bike / Black Purple Fade / 20.5TT
Division Brookside 20 Inch Bike

$659.99 AUD

Black/Polished
Black Purple Fade
Gloss Black
20.5
Sold out
A Kink Carve 16 Inch Bike with thick tires, a straight horizontal bar, Mission parts, and orange lettering on the frame. The Kink Carve 16 Inch Bike features a stylish black frame and robust tires, capturing the true spirit of BMX against its dark backdrop. Meticulously designed, this bike includes key Mission components for exhilarating rides.
Kink Carve 16 Inch Bike
$668.99 AUD
Digital Black
16.5
Sold out
DK Swift Micro 18 Bike / 16.25TT / Teal DK Swift Micro 18 Bike / Black / 16.25TT
DK Swift Micro 18 Bike

$599.99 AUD

Black
Teal
16.25
Sold out
Description: The Radio Evol 20 Inch Bike, perfect for beginner riders, showcases "Radio Bike Co." branded tires, a padded seat, and straight handlebars. This black BMX bike is equipped with high-quality parts, a durable frame, and pegs on both the front and rear wheels. A blue BMX bike with black tires and handlebars, featuring "Radiobike" branding on the frame. The Radio Evol 20 Inch Bike boasts high-quality bike parts, offering a sturdy build and sleek design ideal for beginner riders.
Radio Evol 20 Inch Bike

$599.99 AUD

Matt Black
Matt Sky Blue
20.3
Sold out
DK Swift Expert Bike / Black / 19.5TT A black DK Swift Expert Bike, featuring a sleek frame, flat handlebars, and knobby tires, is elegantly positioned against a plain white background.
DK Swift Expert Bike

$499.99 AUD

Black/Red/White
Black/White
19.5
Sold out
The Kink Kicker 18 Inch Bike (2026) features a sturdy gray frame, wide black tires, and a comfy padded seat. Perfect for freestyle enthusiasts, it comes with grippy handlebars and pedal pegs on each side for daring tricks. The Kink Kicker 18 Inch Bike (2026), featuring thick tires, is displayed indoors against a graffiti-style wall with bold white and gray lettering.
Kink Kicker 18 Inch Bike (2026)

$748.99 AUD

Gun Metal Grey
18
Save $100.00
The Wethepeople Arcade 20 Inch Bike features Salt Comp parts, a beige frame, black seat, handlebars, and tires. Shown in profile against a white background—this is a sleek mid-tier BMX bike option. The Wethepeople Arcade 20 Inch Bike is shown in profile on a white background. This blue BMX features black handlebars, seat, and tires, with the "WeThePeople" brand name boldly displayed on the frame.
Wethepeople Arcade 20 Inch Bike
From

$999.99 AUD

$1,099.99 AUD

Candy Red
Matt Black
Matt Turquoise
Beige
Black
Silent Green Metallic
Matt Trans Stone Grey
2120.5

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