The Radio Quartz Pro XL Bike 2025, in black, boasts a lightweight hydro-formed frame with a compact design, elevated handlebars, large sturdy wheels, and hydraulic disc brakes, epitomizing both performance and style.
The Radio Quartz Pro XL Bike 2025 boasts a compact, lightweight black hydro-formed frame with a "Radio" logo. This model features large tires, a single gear, and raised handlebars, paired with superior handling courtesy of the Radio Solar carbon fork.
The Radio Quartz Pro XL Bike 2025 is a black BMX bike equipped with a lightweight hydro-formed frame, a narrow seat, large pedals, and a simple design. It features thick tires, hydraulic disc brakes, and a single brake lever.
Close-up view of the handlebars, front fork, and wheel of a black "Radio Quartz Pro XL Bike 2025," showcasing its lightweight hydro-formed frame, brake cable, and tires with visible tread pattern.
Close-up of the front view of a black race bike with wide handlebars, featuring visible Radio Quartz Pro XL Bike 2025 branding on its hydro-formed frame and handlebar.
Close-up of a black bicycle handlebar with attached brake lever, cables, and hydraulic disc brakes against a white background. The word "READY" is visible on the handlebar. This setup belongs to the Radio Quartz Pro XL Bike 2025 with its lightweight hydro-formed frame, emphasizing performance and durability.
Close-up of the handlebar and brake lever of the Radio Quartz Pro XL Bike 2025, featuring a textured grip, set against a plain white background. The partially visible front tire and fender suggest the sleek design of its lightweight hydro-formed frame.
Close-up of the front section of a black Radio Quartz Pro XL Bike 2025, showcasing its handlebars, lightweight hydro-formed frame, and front tire marked with the brand name "RADIO." The bike is equipped with hydraulic disc brakes for superior stopping power.
Close-up of a Radio Quartz Pro XL Bike 2025 frame's front section, showcasing the junction between the head tube and downtube, with a cable routed elegantly through the lightweight hydro-formed structure and part of the front tire in view.
Close-up view of a bicycle wheel's hub and spokes, showing part of the black fork with the Radio Quartz Pro XL Bike 2025 logo visible.
Close-up of a black bicycle seat on the lightweight hydro-formed frame of the Radio Quartz Pro XL Bike 2025, with visible parts of the seat post, rear wheel, and hydraulic disc brakes.
Close-up of a black bicycle handlebar stem assembly with several bolts and branding logos visible, attached to the Radio Quartz Pro XL Bike 2025's lightweight hydro-formed frame.
Close-up view of a black bicycle pedal and crank arm, showcasing the gear mechanism on the Radio Quartz Pro XL Bike 2025. The pedal features a flat, wide platform with metal pins for enhanced grip. The background is white.
Close-up image of a bicycle rear wheel with visible spokes, chain, hydraulic disc brakes, and a lightweight hydro-formed frame labeled "Radio Quartz Pro XL Bike 2025." The wheel is set against a plain white background.

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 XL is the mid size offered in the 3 bike Quartz range. With a popular Pro XL(+) top tube length of 21.25 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 XL, 21.25 inch top tube. The mid size of 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 XL
  • Frame: Radio Raceline 'Quartz', lightweight hydroformed 6061-T6 alloy, tapered head tube, forged dropouts, internal chain tensioners, sliding dropout, internal cable routing
  • Top tube: 21.25"
  • 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 XL Bike 2025

Brand: Radio SKU:

$2,599.99 AUD

Or 4 payments of $649.99 AUD with

Recommended Rider Height:

165-180cm

Colour - Matte Black

Top Tube Length - 21.25

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.

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.

  • Between two sizes and still growing? Take the larger size.
  • Racing gates and wanting the bike to turn faster? Take the smaller size.
  • Top tube is the number that actually changes the fit, so compare it against the bike they ride now.

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

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.

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.

  • Between two sizes and still growing? Take the larger size.
  • Racing gates and wanting the bike to turn faster? Take the smaller size.
  • Top tube is the number that actually changes the fit, so compare it against the bike they ride now.

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

Read the full buying guide
$2,599.99 AUD

Price match request

Radio Quartz Pro XL Bike 2025 - Matte Black / 21.25

Metro bike shipping from $59.99

Regional and remote rates may differ

Free in-store pickup - Brisbane

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