The Radio Quartz Pro Bike (2026) is a gray BMX-style bike with an aluminum Quartz frame, black handlebars, seat, and wheels, shown from the side on a white background—ideal as a lightweight alloy race bike.

Radio Quartz Pro Bike (2026) - supplier product photo

Radio Quartz Pro Bike (2026) - detail 10

Radio Quartz Pro Bike (2026) - detail 11

Radio Quartz Pro Bike (2026) - detail 12

Highlights

Six-time world championship frame
New sliding disc dropouts
Pro race geometry
Full Arise component kit

Description

Based upon Radio's headlining aftermarket aluminium Quartz frame, their complete race bike is ready to win straight out of the box. This frame has seen six world championships and is constructed from super-lightweight alloy with no details spared.

Radio's designers took this frame and draped it in only the very best components, creating a full PRO build that will hold its own in any level of competition. This alloy frame is no poor cousin to any carbon frames, it's a legit title contender.

New for 2026, the Quartz Disc frame features the new sliding disc dropouts with flat mount brakes and super stealthy cable routing.

Features

Six-time world championship frame. The Quartz Disc frame is hydroformed 6061-T6 alloy, super light, with a tapered head tube and forged sliding dropouts.
New sliding disc dropouts. Flat mount disc brakes, internal chain tensioners and stealthy cable routing keep the back end tidy and chain tension easy to set.
Pro race geometry. A 20.5" top tube, 74° head tube angle, 71° seat tube angle, 11.6" bottom bracket height and 13.9" chainstays.
Full Arise component kit. Arise Neon Pro toploader stem, Xenon Pro 2-piece cranks on a 24mm spindle, sealed Bravo hubs and tubeless ready Argon Pro alloy rims.
43T to 16T race gearing. An alloy Xenon Pro sprocket and sealed 16T cassette driver joined by a KMC Z1eHX chain, rolling on Tioga Fastr tyres.

Specifications

Size: Pro, 20" wheels
Frame: Radio Raceline Quartz Disc, lightweight hydroformed 6061-T6 alloy, tapered head tube, sliding forged dropouts with internal chain tensioners, flat mount disc brake
Top tube: 20.5"
Chainstay: 13.9"
Head tube angle: 74°
Seat tube angle: 71°
Bottom bracket height: 11.6"
Fork: Radio Raceline alloy, 20mm offset
Headset: Radio Raceline Pro integrated, sealed, threadless, 1-1/8" to 1.5"
Stem: Arise Neon Pro toploader, 54mm extension, CNC machined, alloy
Bars: Radio Raceline Neon Pro hydroformed, multiple butted and heat-treated chromoly, 28" wide, 7.5" rise, 2.5" upsweep, 6.5° backsweep
Grips: Radio Raceline Xenon, diamond knurling, clamp-on, 139mm
Brakes: Arise Race rear flat-mount disc calliper
Brake lever: Arise Race
Cranks: Arise Xenon Pro 2-piece, cold forged and CNC, alloy, 175mm, 24mm spindle
Bottom bracket: Radio Raceline BSA 24 set, external bearing cups, CNC machined, sealed
Sprocket: Arise Xenon Pro PRO XL/XXL, 43T, alloy, with alloy chainring bolts
Chain: KMC Z1eHX, 1/2" x 3/32"
Pedals: Radio Raceline Xenon Slim, alloy
Front hub: Arise Bravo, CNC alloy, fully sealed, 36h, 3/8" female chromoly axle
Rear hub: Arise Bravo, CNC alloy, fully sealed, 36h, disc brake cassette, 6 pawl, 3/8" female chromoly axle
Rear cog: Radio Raceline driver, 16T, 1/2" x 3/32", sealed cassette
Spokes: Stainless
Rims: Arise Argon Pro, flash welded, 36h, tubeless ready, alloy, front and rear
Tyres: Tioga Fastr, front: 20" x 1.75", rear: 20" x 1.6"
Gearing: 43T sprocket, 16T driver

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 Bike (2026)

Name: Radio Quartz Pro Bike (2026)
Brand: Radio Raceline
SKU: RABK245-26-GRY
Price: 2799.99 AUD
Availability: InStock

Brand: Radio Raceline SKU: Click to copy the SKU and show the pick location

$2,799.99 AUD

Or 4 payments of $699.99 AUD with

Colour - Dark Blue Grey Metallic

Top Tube Length - 20.5

Race frames are sized by class, and the class you ride is set by rider height rather than age.

Size	Rider height	Top tube
Micro (18" wheels)	Under 110cm	16.25"
Mini (20" wheels)	110 to 125cm	17 to 18"
Junior	120 to 140cm	18.25 to 18.75"
Expert	135 to 155cm	19.5 to 19.75"
Expert XL	150 to 165cm	20 to 20.75"
Pro	160 to 170cm	20.25 to 20.75"
Pro XL	165 to 175cm	21 to 21.25"
Pro XXL	170 to 185cm and up	21.5 to 21.85"
Pro XXXL	175 to 185cm and up	22"
Pro XXXXL	185cm and up	22.5"
Cruiser (24" wheels)	175cm and up	21.5" 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

Race frames are sized by class, and the class you ride is set by rider height rather than age.

Size	Rider height	Top tube
Micro (18" wheels)	Under 110cm	16.25"
Mini (20" wheels)	110 to 125cm	17 to 18"
Junior	120 to 140cm	18.25 to 18.75"
Expert	135 to 155cm	19.5 to 19.75"
Expert XL	150 to 165cm	20 to 20.75"
Pro	160 to 170cm	20.25 to 20.75"
Pro XL	165 to 175cm	21 to 21.25"
Pro XXL	170 to 185cm and up	21.5 to 21.85"
Pro XXXL	175 to 185cm and up	22"
Pro XXXXL	185cm and up	22.5"
Cruiser (24" wheels)	175cm and up	21.5" and up

How to measure

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.

Read the full buying guide

Radio Quartz Pro Bike (2026) - Dark Blue Grey Metallic / 20.5

$2,799.99 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