The Radio Quartz Pro XXL Bike 2025, a black BMX bicycle featuring a sleek, lightweight hydro-formed frame, straight handlebars, and thick tires, is shown against a white background.
The Radio Quartz Pro XXL Bike 2025 is a black BMX bicycle featuring a robust, hydro-formed frame, wide handlebars, and knobby tires. It boasts a single gear chain drive and Radio Raceline Quartz Pro XL branding on both the frame and tires.
The Radio Quartz Pro XXL Bike 2025 is a black BMX bike equipped with a hydro-formed frame, 20-inch wheels, and high handlebars. It features a single rear brake and front pegs for all your stunt needs.
Radio Quartz Pro XXL Bike 2025 in black, featuring a front view showcasing handlebars, brake cable, and tire, and equipped with a hydro-formed frame for enhanced durability.
Close-up of a black Radio Quartz Pro XXL Bike 2025 featuring a lightweight hydro-formed frame and Radio Solar carbon fork. The brand name "Radio" is visible on the tire and frame, while the brake cable is also prominently shown.
Close-up view of a black bicycle handlebar and stem, featuring screws and a branded logo on the stem clamp, seamlessly integrated with the Radio Quartz Pro XXL Bike 2025. The lightweight hydro-formed frame adds to its sleek design.
Close-up of the Radio Quartz Pro XXL Bike 2025 handlebar featuring a black grip and brake lever, with a blurred background showcasing the lightweight hydro-formed frame and Solar carbon fork.
Close-up of the front frame of a Radio Quartz Pro XXL Bike 2025 black bicycle, showcasing the integrated cable routing and lightweight hydro-formed frame.
Close-up of the Radio Quartz Pro XXL Bike 2025's black handlebars with brake lever and cable, featuring branded text "REAPID" and "FREE" on the bars. Against a plain white background, the details of this sleek design highlight its compatibility with complete race bikes equipped with a carbon fork.
Close-up image of a black bicycle's front fork and tire, featuring the brand name "RADIO" on the tire and detailed welding on the carbon fork. This premium setup is part of the Radio Quartz Pro XXL Bike 2025 lineup of complete race bikes.
Close-up of a bicycle wheel with black spokes and a black fork. The fork of the Radio Quartz Pro XXL Bike 2025 has the word "TORAY" printed vertically on it, complementing the lightweight hydro-formed frame.
Close-up image of a black bicycle seat and seat post on a Radio Quartz Pro XXL Bike 2025 with a black-framed, lightweight hydro-formed frame against a white background.
Close-up of a black bicycle crank and pedal against a white background, showcasing the Radio Quartz Pro XXL Bike 2025 with its lightweight hydro-formed frame.
Close-up view of the rear wheel assembly of a bicycle, showcasing the spokes, chain, and lightweight hydro-formed frame labeled "Radio Quartz Pro XXL Bike 2025," a sub $3000 race bike.

Highlights

  • Radio Solar carbon fork
  • Hydraulic disc brake, 140mm rotor
  • Hydroformed 6061-T6 alloy frame
  • Pro XXL, 21.75 inch top tube

Description

It was only a matter of time before Radio Raceline started to produce complete race bikes to shake up the traditional race bike market, The Radio Raceline Quartz Pro XXL is the biggest size offered in the 3 bike Quartz range. With a popular Pro XXL(+) top tube length of 21.75 inches, this lightweight hydro-formed frame is spec'd with some very impressive parts like the Radio Solar carbon fork and hydraulic disc brakes.

The Radio Quartz has class leading frame geometry design, and materials utilised in its construction are at the top end of any complete race bike available on the market today . Add to that that Radio have nailed the colourway and graphics and we'll be lucky if any are left by the time you finish reading this description!

The vital stats are listed below, but make sure you check the specification table to drill down into what makes this bike unique in the sub $3000 race market. We've been building custom race bikes for a number of years now at LUXBMX, and we can hand on heart say, you wouldn't get anything near the level that this bike straight out of the box. Bolt on your clip pedals and tear out the fastest hill times you've ever done. The Radio Quartz is that good!

Features
  • Radio Solar carbon fork. A full carbon fork with a 1-1/8" to 1.5" tapered steerer and 32mm offset, one of the standout parts on this build.
  • Hydraulic disc brake, 140mm rotor. A Radio Raceline two finger lever runs the rear hydraulic disc, straight out of the box.
  • Hydroformed 6061-T6 alloy frame. Tapered head tube, forged dropouts, internal chain tensioners, the new sliding dropout and internal cable routing.
  • Pro XXL, 21.75 inch top tube. The biggest size in the three bike Quartz range, with an 11.6" bottom bracket height and 44x16 gearing.
  • Tubeless ready Argon Pro rims. Sleeved 36H alloy rims on fully sealed Turbine hubs with stainless spokes, running 20x1.75" tyres.

Specifications
  • Size: 20" wheels, Pro XXL
  • Frame: Radio Raceline 'Quartz', lightweight hydroformed 6061-T6 alloy, tapered head tube, forged dropouts, internal chain tensioners, sliding dropout, internal cable routing
  • Top tube: 21.75"
  • Bottom bracket height: 11.6"
  • Fork: Radio Raceline 'Solar' carbon fork, 1-1/8" to 1.5" tapered steerer, 32mm offset
  • Headset: Radio Raceline 'Pro' integrated headset, sealed, threadless, 1-1/8" to 1.5"
  • Stem: Radio Raceline 'Neon Pro' toploader, 54mm extension, CNC machined alloy
  • Bars: Radio Raceline 'Neon Pro' hydroformed bar, multiple butted and heat treated crmo
  • Grips: Radio Raceline 'Xenon' grips, diamond knurling, clamp on, 139mm
  • Brakes: Radio Raceline hydraulic disc, 140mm rotor, rear, 2 finger lever
  • Cranks: Radio Raceline 'Xenon Pro' 2pc crank, cold forged and CNC alloy, 180mm, 24mm spindle
  • Bottom bracket: Radio Raceline 'BSA24', external bearing cups, CNC machined, sealed
  • Chainring: Radio Raceline 'Xenon Pro' sprocket, 44T, alloy, alloy bolts
  • Chain: KMC 'Z1eHX', 1/2" x 3/32"
  • Pedals: Radio Raceline 'Xenon Slim' pedal, alloy
  • Front hub: Radio Raceline 'Turbine' front hub, CNC alloy, fully sealed, 3/8" female crmo axle
  • Rear hub: Radio Raceline 'Turbine' rear hub, CNC alloy, fully sealed, disc brake cassette, 3/8" female crmo axle
  • Rear cog: 16T
  • Spokes: Stainless steel
  • Rims: Radio Raceline 'Argon Pro' rim, sleeved, 36H, tubeless ready, alloy
  • Tyres: 20x1.75"
  • Gearing: 44x16, 53.62" gear ratio
  • Note: The key specs list a 180mm crank while the parts table lists 175mm.

Assembly information

Your race 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
  • Spin the rear wheel and check the rotor runs clear of the calliper
  • Check the brake and tyre pressure before the first ride

Disc brakes: keep your fingers off the rotor and pads, because oil from your skin contaminates the braking surface and takes the bite away. If the rotor rubs, loosen the two calliper bolts, squeeze the lever, then tighten them again with the lever held on. Bed the brake in with a few firm stops before you race it.

Tools: Allen key set and a 15mm spanner for the pedals. Check your axle hardware, since race bikes vary between bolt-on nuts and a thru-axle.

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 Quartz Pro XXL Bike 2025

Brand: Radio SKU:

$2,599.99 AUD

Or 4 payments of $649.99 AUD with

Recommended Rider Height: 170 cm and taller

Colour - Matte Black

Top Tube Length - 21.75

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 110cm16.25"
Mini (20" wheels)110 to 125cm17 to 18"
Junior120 to 140cm18.25 to 18.75"
Expert135 to 155cm19.5 to 19.75"
Expert XL150 to 165cm20 to 20.75"
Pro160 to 170cm20.25 to 20.75"
Pro XL165 to 175cm21 to 21.25"
Pro XXL170 to 185cm and up21.5 to 21.85"
Pro XXXL175 to 185cm and up22"
Pro XXXXL185cm and up22.5"
Cruiser (24" wheels)175cm and up21.5" and up

Heights overlap between bike sizes on purpose. If you fall in two size categories, a growing rider new to racing is usually better suited to the larger bike, a experienced rider who wants the bike to more responsive should err on the smaller size. Some brands label the Pro size Pro L, with the same fit.

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. Just don't guess their height either, you know how fast they can grow!

Here are some tips

  • Between two sizes and still growing? Take the larger size, but make sure you check the top tube length of the bike. The length of top tube for a given size (Expert XL as an example) can vary up to a half inch or more across brands. Most Expert XL frames are 20", but we've seen them as long as 20.7"
  • Experienced racer and wanting the bike to be more responsive? Take the smaller size. You want the bike to be "under you", not a stretch to the bars and cranks.
  • Top tube is the number that actually changes the fit, so compare it against the bike they ride now.

Still not sure? We're the experts and size bikes for riders every day of the week. Our team has decades of experience between them and will help you decide which bike is the right fit based on rider height and racing experience.

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 110cm16.25"
Mini (20" wheels)110 to 125cm17 to 18"
Junior120 to 140cm18.25 to 18.75"
Expert135 to 155cm19.5 to 19.75"
Expert XL150 to 165cm20 to 20.75"
Pro160 to 170cm20.25 to 20.75"
Pro XL165 to 175cm21 to 21.25"
Pro XXL170 to 185cm and up21.5 to 21.85"
Pro XXXL175 to 185cm and up22"
Pro XXXXL185cm and up22.5"
Cruiser (24" wheels)175cm and up21.5" and up

Heights overlap between bike sizes on purpose. If you fall in two size categories, a growing rider new to racing is usually better suited to the larger bike, a experienced rider who wants the bike to more responsive should err on the smaller size. Some brands label the Pro size Pro L, with the same fit.

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. Just don't guess their height either, you know how fast they can grow!

Here are some tips

  • Between two sizes and still growing? Take the larger size, but make sure you check the top tube length of the bike. The length of top tube for a given size (Expert XL as an example) can vary up to a half inch or more across brands. Most Expert XL frames are 20", but we've seen them as long as 20.7"
  • Experienced racer and wanting the bike to be more responsive? Take the smaller size. You want the bike to be "under you", not a stretch to the bars and cranks.
  • Top tube is the number that actually changes the fit, so compare it against the bike they ride now.

Still not sure? We're the experts and size bikes for riders every day of the week. Our team has decades of experience between them and will help you decide which bike is the right fit based on rider height and racing experience.

Read the full buying guide

Radio Quartz Pro XXL Bike 2025 - Matte Black / 21.75

$2,599.99 AUD

Price match request

  • Arrives mostly assembled. Most people finish it in 10 to 20 minutes.
  • Pay over time with Zip Money. PayPal Pay in 4 covers orders under $2,000. How it works

Bike shipping from $39.99All rates

Free in-store pickup - Brisbane

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

WE ALSO RECOMMEND:

The TLD D4 AS Polyacrylite Helmet W/MIPS Stealth Black is a matte black full-face helmet with a visor, white Troy Lee Designs branding, and geometric graphics on the side and chin.
A TLD D4 AS Polyacrylite Helmet W/MIPS Stealth Black by Troy Lee Designs on a white background.
A table showing the prices of different TLD D4 AS Polyacrylite Helmets W/MIPS Stealth Black safety helmets.
The TLD D4 AS Polyacrylite Helmet W/MIPS Stealth Black is a matte black full-face helmet with a visor, ventilation openings, and a bold white side logo.
The TLD D4 AS Polyacrylite Helmet W/MIPS Stealth Black features a matte finish and bold visor logos, shown from a top-down view.
The TLD D4 AS Polyacrylite Helmet W/MIPS Stealth Black features a matte black finish with white Troy Lee Designs logos, large visor, and multiple ventilation openings for full-face protection.
TLD D4 AS Polyacrylite Helmet W/MIPS Stealth Black

$584.99 AUD

Stealth Black
XS-SM-LXL-XXL
HT T2 Clip In Pedals / Black
HT T2 Clip In Pedals / Stealth Black
HT T2 Clip In Pedals / Purple
HT T2 Clip In Pedals / Gold
HT T2 Clip In Pedals / Grey
HT T2 Clip In Pedals / Marine Blue
HT T2 Clip In Pedals / Silver
HT T2 Clip In Pedals / Oil Slick
HT T2 Clip In Pedals / Orange
HT T2 Clip In Pedals / Apple Green
HT T2 Clip In Pedals / Red
HT T2 Clip In Pedals / Royal Blue
HT T2 Clip In Pedals / Turquoise
HT T2 Clip In Pedals
From

$254.99 AUD

Black
Stealth Black
Purple
Gold
Grey
Marine Blue
Silver
Oil Slick
Orange
Apple Green
Red
Royal Blue
Turquoise
9/16 Inch

Price match request

Seen it cheaper somewhere else? Send us the link and we'll take a look.

Consider these instead

RABK248-26-GRY
RABK248
RABK248
RABK248
RABK248
RABK248
RABK248
RABK248
RABK248
RABK248
RABK248
RABK248
RABK248
RABK248
Radio Quartz Pro XXL Bike (2026)

$2,799.99 AUD

or $699.99 a fortnight
Dark Blue Grey Metallic
21.75