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 Sunday High C 29 Inch Bike (2025) is a purple single-speed cruiser with a chromoly frame, black handlebars, seat, and tires featuring yellow Maxxis branding on both 29" wheels. Introducing the Sunday High C 29 Inch Bike (2025) in blue, featuring a durable chromoly frame, black handlebars, and black wheels adorned with striking yellow Maxxis branding on the tires—ideal for performing wheelies around town.
Sunday High C 29 Inch Bike (2025)

$1,099.99 AUD

Gloss Surf Blue
Matte Grape Soda
Matte Ice Green
23.5
Sold out
An orange Kink Roaster 12 inch Bike (2025) with black handlebars, seat, pedals, and tires. Featuring 12” wheels and a solid frame, this child's first BMX bike is designed without training wheels and includes a coaster brake for safe stopping. Close-up view of a black bicycle handlebar stem and clamp assembly attached to an orange frame, showcasing the sturdy design of a Kink Roaster 12 inch Bike (2025) with 12” wheels and coaster brakes.
Kink Roaster 12 inch Bike (2025)

$478.99 AUD

Orange
12.5
A blue BMX bike with black tires, straight handlebars, and "Radio Dice 14 Inch Bike" printed on the frame. The 14-inch lightweight kids bike is in a standing position. Radio Dice 14 Inch Bike against a white background, featuring a sleek 6061-T6 alloy frame and visible brand logo on the crossbar.
Radio Dice 14 Inch Bike

$699.99 AUD

Black
Cyan Blue
Candy Red
Matt Black
Black/White
Sky Blue Metallic
14.5
Wethepeople Justice 20 Inch Bike - Trans Orange Ash The Wethepeople Justice 20 Inch Bike features a red frame with black handlebars, seat, and tires, displayed in profile on a white background—perfect for adrenaline-fueled city rides.
Wethepeople Justice 20 Inch Bike

$1,199.99 AUD

Matt Black/Raw Fade
Matt Trans Black
Matt Taxi Yellow
Matt Ghost Grey
Matte Velvet Red
Matt Black Silver Webbed
Trans Orange Ash
20.7520.85
Sold out
The Kink Coast 12 Inch Balance Bike features a minimalist silver frame with black saddle, grips, and tires. Designed like a pedal-free kids BMX, it's perfect for young children to improve balance while riding. The Kink Coast 12 Inch Balance Bike, featuring a small silver frame with black handlebars, seat, and tires, stands out against a dark background.
Kink Coast 12 Inch Balance Bike
$399.99 AUD
Digital Silver
12
The Division Blitzer 14 Inch Bike is a purple kids' BMX with black handlebars, seat, and thick tires, displayed in profile view against a white background. The Division Blitzer 14 Inch Bike features a black frame, thick tires, padded seat, straight handlebars, and "Blitzer" branding—an ideal stylish ride for youth.
Division Blitzer 14 Inch Bike

$449.99 AUD

Black
Metal Purple
14
The Wethepeople CRS 20 Inch Bike features a white frame with black wheels, a black seat, and bold "WETHEPEOPLE" branding—perfect for freestyle BMX. Shown in a side view against a plain background. Wethepeople CRS 20 Inch Bike / Translucent Red / 20.25TT
Wethepeople CRS 20 Inch Bike

$999.99 AUD

Translucent Red
Matte Black
Galactic Purple
Dark Goblin Green
Matte Trans Blue
Trans Blue Raw Fade
Light Stone Pale
20.25
Wethepeople Revolver 20 Inch Bike - Matt Trans Steel Grey The Wethepeople Revolver 20 Inch Bike, featuring a 21" top tube and metallic frame with black handlebars, is displayed indoors on a wooden floor against a geometric mural backdrop.
Wethepeople Revolver 20 Inch Bike

$1,999.99 AUD

Matte Skipper Green
Translucent Racing Green
Black
Matt Trans Steel Grey
Matt Black Acid Drip
21
SUBK231 SUBK231
Sunday Primer 20 Inch Bike
$849.99 AUD
Gloss Black
Gloss Sunday Blue
Gloss Surf Pink
Midnight Purple
Gloss Billiard Green
Gloss Pine Green
Matte Dark Brown
2020.520.7521
Sold out
Fit Bike STR Bike (2023) / Matte Black / 20.5TT Fit Bike STR Bike (2023) / Matte Army Green / 20.5TT
Fit Bike STR 20 Inch Bike (2023)
$799.99 AUD
Matte Black
Matte Army Green
Cream
Matte Purple
Slate Grey
Matte Sliver
20.520.75
SUBK226-23-OBU The Sunday Blueprint 16 Inch Bike, featuring a small blue and black frame, thick tires, straight handlebars, Odyssey Springfield Brakes, and a padded seat, is displayed against a white background.
Sunday Blueprint 16 Inch Bike
$599.99 AUD
Gloss Yellow
Gloss Blue
Ocean Blue
15.5
Sold out
DK Swift Junior Bike / Black / 18.25TT The DK Swift Junior Bike has a lightweight aluminum frame, finished in turquoise with black seat, handlebars, and tires.
DK Swift Junior Bike
$499.99 AUD
Black/Red/White
Teal
Black/White
18.25
Save $150.00
The Chase Edge Cruiser Bike (2026) is a white and black BMX race bike with a lightweight 6061 aluminum frame, large tires, front and rear brakes, and a single gear, shown on a plain white background. The Chase Edge Cruiser Bike (2026) is a white and black BMX race bike with a lightweight 6061 aluminum frame, flat handlebars, thick tires, and Shimano hydraulic disc brakes, displayed on a plain white background.
Chase Edge Cruiser Bike (2026)

$1,249.99 AUD

$1,399.99 AUD

Cement Grey
Slate Blue
21.5
The Cult Gateway 20 Inch Bike, sporting a sleek black design, comes equipped with thick tires, a padded seat, and BMX handlebars. The Cult Gateway 20 Inch Bike boasts a modern geometry with a black handlebar and seat set against a white frame.
Cult Gateway 20 Inch Bike

$899.99 AUD

All Black
Matte White
Silver
Matte Raw
Matte Orange
20.5
A black Wethepeople Prime Drive 12 Inch Bike on a white background. An orange Wethepeople Prime Drive 12 Inch Bike on a white background.
Wethepeople Prime Drive 12 Inch Bike

$799.99 AUD

Black
Orange
Aqua
12.5
Save $166.00
Radio Revo Pro 20 Bike / Black / 20TT Radio Revo Pro 20 Bike / Silver / 20TT
Radio Revo Pro 20 Inch Bike
$649.99 AUD
Black
Silver
Graphite Deluxe
20
Sold out
Cult Devotion 29 Inch Bike (2022) / Raw / 23.5TT Cult Devotion 29 Inch Bike (2022) / Black / 23.5TT
Cult Devotion 29 Inch Bike

$1,199.99 AUD

Raw
Black
23.5
Save $100.00
The Radio Dice 20 Inch Bike, featuring a green lightweight alloy frame labeled "RSR," black handlebars and pedals, and 20-inch tires, is displayed on a white background. The Radio Dice 20 Inch Bike is a black BMX with a lightweight alloy frame, 20" wheels, straight top tube, padded seat, and front and rear brakes, displayed on a white background.
Radio Dice 20 Inch Bike
$699.99 AUD
Matt Black
Candy Red
Black/White
Laguna Green Metallic
20
Save $200.00
The Chase Edge Pro XL Bike (2026) is a white and black BMX race bike featuring thick tires, a compact 6061 aluminium frame, straight handlebars, and a low seat, shown on a white background. The Chase Edge Pro L Bike (2026) is a white and black BMX with large handlebars, a padded seat, thick tires, and a single gear, shown from a rear side angle.
Chase Edge Pro XXL Bike (2026)

$1,199.99 AUD

$1,399.99 AUD

Cement Grey
Slate Blue
21.5
Sold out
The Kink Curb 20 Inch Bike (2026) is ideal for beginners, showcasing a sleek black design and 20-inch wheels. It caters to entry-level riders with a padded saddle and handlebars featuring a brake lever for comfortable and safe rides. The Kink Curb 20 Inch Bike (2026) is perfect for beginners. With its sleek blue frame, black tires, and sturdy handlebars, this BMX is designed for entry-level riders ready to make their mark.
Kink Curb 20 Inch Bike (2026)
$648.99 AUD
Black
Teal
Orange
20
Sold out
A small teal Kink Pump 14 Inch Bike (2025) with thick black tires, a black seat, and black handlebars, ideal for young riders. Close-up of a BMX handlebar with a textured black grip and attached brake lever, perfect for young riders using the Kink Pump 14 Inch Bike (2025).
Kink Pump 14 Inch Bike (2025)

$569.99 AUD

Gloss Digital Green
14.5
Sold out
The Radio 26 Inch Asura Bike is a sleek black bicycle featuring a durable chromoly frame, thick INNOVA-branded tires, and 26-inch wheels. This single-gear bike boasts straight handlebars and a compact seat for a streamlined ride. The Radio 26 Inch Asura Bike features a sleek 26-inch chromoly frame, disc brakes, and thick tires designed for rugged terrains.
Radio 26 Inch Asura Bike

$1,059.00 AUD

Black
Blue
Green
22.7
Sold out
Fit Bike Co Series 22 Bike (2023) / Gloss Black / 21.25TT Fit Bike Co Series 22 Bike (2023) / Deep Purple / 21.25TT
Fit Series 22 Inch Bike (2023)

$999.99 AUD

Gloss Black
Deep Purple
21.25
Sold out
Fit Bike Co CR29 Bike (2023) / White Out / 23.75TT Fit Bike Co CR29 Bike (2023) / Hurricane Yellow / 23.75TT
Fit CR29 Inch Bike (2023)

$862.99 AUD

White Out
Hurricane Yellow
23.75

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