Radio Darko 20 Bike / Neptune Green / 20.5TT
Radio Darko 20 Bike / Matt Black / 20.5TT
Radio Darko 20 Bike / Matt Black / 21TT
Radio Darko 20 Bike / Neptune Green / 21TT
A purple Radio Darko 20 Inch Bike on a white background.
The Radio Darko 20 Inch Bike, shown on a white background, features a black chromoly frame with “RADIOBIKES.COM” branding and thick Salt Burn Tyres in a gray and white camouflage pattern.
The Radio Darko 20 Inch Bike features a turquoise Chromoly frame, black handlebars, seat, pedals, and Salt Burn Tyres, displayed on a white background.
The Radio Darko 20 Inch Bike, featuring a sturdy Chromoly frame in purple with black handlebars, seat, pedals, and Salt Burn Tyres, is displayed on a white background.
Close-up of a black pedal attached to a crank arm labeled "RADIOBIKECO," with part of the wheel from the Radio Darko 20 Inch Bike visible on the right.
Close-up of a black bicycle saddle on the Radio Darko 20 Inch Bike, featuring a matte black Chromoly frame and Salt Burn Tyres, with part of the rear tire visible in the background.
Close-up of a black seat on the Radio Darko 20 Inch Bike, featuring a metallic teal BMX design with a sturdy Chromoly frame, showing the rear wheel and pedal.
Close-up of a black seat on the Radio Darko 20 Inch Bike, featuring a metallic purple frame made from durable chromoly, with part of the rear tire visible.
Close-up of the crankset, chain, and pedal on a teal Radio Darko 20 Inch Bike, with RADIOBIKECO branding visible on the crank arm.
Close-up of a black pedal and crank arm with "RADIOBIKECO." branding on the Radio Darko 20 Inch Bike, showing its BMX wheel, chainring, and Salt Burn Tyres.
Close-up of a black BMX wheel on the Radio Darko 20 Inch Bike, highlighting spokes, hub, axle, and a gray Salt Burn Tyres tire with a white tread pattern.
Close-up of the Radio Darko 20 Inch Bike’s front wheel with black spokes, a black hub, a purple fork labeled "DARKO," and durable Salt Burn Tyres.
Close-up of a black crankset and chainring on a purple Radio Darko 20 Inch Bike BMX, with part of the rear tire visible.
Close-up of the Radio Darko 20 Inch Bike's black handlebars, stem, and front tire, highlighting its metallic turquoise chromoly frame and Salt Burn Tyres.
Close-up of the Radio Darko 20 Inch Bike’s black handlebar grip and seat, with part of the rear wheel and Salt Burn Tyres in the background.
Close-up of the Radio Darko 20 Inch Bike’s rear wheel showing black spokes, teal chromoly frame, axle nuts, part of the tire, and chain—highlighting durable Salt Burn Tyres for superior grip and style.
The Radio Darko 20 Inch Bike is shown in side profile on a white background, featuring a black compact Chromoly frame, Salt Burn Tyres, and straight handlebars.
The Radio Darko 20 Inch Bike features a white Chromoly frame, black handlebars and seat, plus Salt Burn Tyres, displayed in side profile against a plain white background.

Description

Rip the fattest skids in your street with one of these burly shred-sleds from Radio! They even threw in some Salt Burn Tyres in 2.35" because they know whats up! Built tough with a Chromoly Top Tube and Down Tube in the frame, and Chromoly Three Piece Cranks, you can feel calm and in control on this rig! A Salt Pro Headset gets those bars spinning at blistering speeds and the Radio Pro Pedals will keep your Crocs glued in place. This is a beast of a bike so get out there and start taming it!

Features
  • Chromoly top tube and down tube. The two tubes that cop the most force are chromoly, so the Darko stays in one piece while you rip skids down your street.
  • Wide SaltPlus Burn tyres. 2.35" rubber front and rear puts a big contact patch on the ground for grip on rough concrete.
  • Radio AM chromoly 3-piece cranks. 170mm tubular chromoly arms and a sealed bearing MID bottom bracket keep the middle of the bike solid.
  • Salt Pro sealed headset. An integrated sealed bearing headset gets those bars spinning at blistering speeds, and the frame takes removable gyro tabs.
  • Removable brake mounts and guides. Run the alloy rear u-brake and lever, or strip the mounts off for a clean frame when you are done with them.

Specifications
  • Size: 20.5" and 21" top tube
  • Frame: Radio Darko, CrMo top tube and down tube, 1020 hi-ten, removable brake mounts and guides
  • Top tube: 20.5" and 21"
  • Chainstay: 13.2"
  • Head tube angle: 75°
  • Seat tube angle: 71°
  • Standover: 8.6"/8.9"
  • Bottom bracket height: 11.7"
  • Fork: Radio AM, 1020 hi-ten, crmo steerer, tapered legs
  • Headset: Salt Pro integrated, sealed bearing
  • Stem: Salt Pro top load, 50mm reach
  • Bars: Radio Darko, 1020 hi-ten, 9" rise, 29.5" wide, 12° backsweep, 2° upsweep
  • Grips: Radio AM XL, 160mm
  • Brakes: Radio AM u-brake, alloy, rear
  • Brake lever: Radio AM, alloy, rear
  • Cranks: Radio AM 3pc, tubular crmo, 170mm, 8 spline
  • Bottom bracket: Radio MID, press fit, sealed bearing
  • Sprocket: Radio Vision, steel, 25t
  • Chain: Salt AM, WZ1 type
  • Pedals: Radio Pro, nylon/fibreglass
  • Front hub: Salt AM, alloy, loose ball, 3/8" male axle, 36h
  • Rear hub: Radio AM cassette, alloy, semi-sealed, 9t, 14mm axle, 36h
  • Rear cog: 9t cassette driver, sealed bearing
  • Rims: Salt Fraction, single wall, front and rear
  • Tyres: SaltPlus Burn, 2.35", front and rear
  • Seat: Radio Century combo, fat padded
  • Seat clamp: Integrated
  • Weight: 11.59 kg
  • Note: Frame has holes for removable gyro tabs.

Assembly information

Your bike ships mostly assembled in the box. Finishing it takes most people 10 to 20 minutes with basic tools, and the video above walks through every step.

  • Fit the handlebars and line them up with the front wheel
  • Fit the front wheel, pedals and seat post
  • Check the brakes and tyre pressure before the first ride

Tools: Allen key set and a 15mm, 17mm or 19mm spanner for the pedals and axle nuts (bikes can vary between these three sizes). A socket is needed if installing pegs.

Rather have it done? Ask us about extra assembly before you order, or any local bike shop can finish the build for a small fee.

Radio Darko 20 Inch Bike

Brand: Radio SKU:

$799.99 AUD

Or 4 payments of $199.99 AUD with

Recommended Rider Height:

168cm+

Colour - Matt Black

Top Tube Length - 20.5

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.

How to measure

Stand your rider against a wall in the shoes they ride in, heels flat, and mark the top of their head. Measure from the floor to the mark.

Top tube is measured from the centre of the seat tube to the centre of the head tube, so it is not the same as the length of the tube you can see.

  • A 20 inch bike is the standard adult BMX and most riders end up there, so do not size a tall child down to a smaller wheel.
  • 22, 24 and 26 inch bikes are adult bikes with a bigger wheel, not bigger frames for taller riders.
  • Size up for stability through trails and transitions. Size down if you want the bike quick and twitchy for spins and grinds.
  • Top tube is fixed, but stem length, fork offset and bar position all shift how roomy the bike feels once you are on it.

Not sure? Send us their height and we will tell you what we would put them on.

Read the full buying guide

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.

How to measure

Stand your rider against a wall in the shoes they ride in, heels flat, and mark the top of their head. Measure from the floor to the mark.

Top tube is measured from the centre of the seat tube to the centre of the head tube, so it is not the same as the length of the tube you can see.

  • A 20 inch bike is the standard adult BMX and most riders end up there, so do not size a tall child down to a smaller wheel.
  • 22, 24 and 26 inch bikes are adult bikes with a bigger wheel, not bigger frames for taller riders.
  • Size up for stability through trails and transitions. Size down if you want the bike quick and twitchy for spins and grinds.
  • Top tube is fixed, but stem length, fork offset and bar position all shift how roomy the bike feels once you are on it.

Not sure? Send us their height and we will tell you what we would put them on.

Read the full buying guide
$799.99 AUD

Price match request

Radio Darko 20 Inch Bike - Matt Black / 20.5

Metro bike shipping from $59.99

Regional and remote rates may differ

Free in-store pickup - Brisbane

Availability

20.521
Matt Black
Neptune Green
Magic Purple
Matte Black
White

● In stock at LUXBMX ● With supplier ● Preorder ○ Sold out

Need Help ?

Chat with the LUXBMX crew!

Email Us Call Us SMS Us
  • 100% Australian owned
  • Australia's largest BMX range
  • Hassle-free returns
  • Fast trackable shipping