Three Radio Raceline Quartz Disc Pro XXXL frames in black, green, and blue are aligned diagonally. Crafted with a lightweight alloy frame for agility, they come with a note indicating potential variations in final appearance.
Metallic teal Radio Raceline Quartz 2025 Pro Frame BMX race frame with Quartz branding on the top tube, featuring a Sliding Dropout Disc System for optimal performance.
The Radio Raceline Quartz 2025 Pro Frame flaunts its bold "Radio" branding on a black BMX race frame. Made with 6061-T6 hydroformed tubing, it features a sleek design and innovative Sliding Dropout Disc System for enhanced versatility and performance, set against a white background.
The Radio Raceline Quartz Disc Pro XXXL Frame is a blue bicycle frame with "Rapid" and "Quartz" labels, featuring a lightweight alloy design. Please note: Final product appearance may vary.

Highlights

  • Sliding dropout disc system
  • Runs 10mm or 15mm rear hubs
  • 1.78 kg hydroformed 6061 frame
  • A small 120mm rotor is plenty

Description

Radio have been quietly chipping away at development on their Quartz frame since its introduction a few years back to a point where it's one of the most advanced aluminium race frames available.

For 2025 one of the innovations is the Sliding Dropout Disc System (SDDS) which utilises a flat mount style calliper and internal cable routing. This not only gives the frame a clean look, the flat mount caliper system is in our opinion one of the best disc brake designs for BMX frames. BMX race bikes don't require large rotors to dissipate heat after repeated braking efforts, meaning that a small 120mm rotor can be utilised, keeping weight low and hardware tucked away from harms way. 

Speaking of dropouts, the 2025 Quartz frame can be built up with either a 10mm bolt-up rear hub, or a 15mm thru-bolt hub.

The frames are manufactured from 6061-t6 hydroformed Paradigm superior tubing, which means that Radio can dial in where the frames require strength and beef up the tubing thickness, and shave that wall thickness right down in areas that don't require it. Leading to a class leading lightness for an aluminium pro frame. 

Features
  • Sliding dropout disc system. The 2025 SDDS runs a flat mount calliper with internal cable routing, so the brake hardware sits tucked away out of harm's way.
  • Runs 10mm or 15mm rear hubs. Build it with a 10mm bolt-up or a 15mm thru-bolt rear hub: all the dropout hardware is included.
  • 1.78 kg hydroformed 6061 frame. Paradigm tubing is thickened where the frame needs strength and shaved down where it doesn't, for class leading lightness in an aluminium pro frame.
  • A small 120mm rotor is plenty. Race efforts don't build the heat that demands a big rotor, so you can run a 120mm rotor and keep weight low.
  • Race fittings sorted. Tapered 1-1/8" to 1.5" integrated head tube, BSA 68mm bottom bracket, 27.2mm seat post and a 31.8mm ID seat clamp.

Specifications
  • Sizes: Pro XXXXL
  • Bottom bracket height: 11.6" (294.64mm)
  • Bottom bracket: BSA, 68mm wide
  • Material: 6061-T6 aluminium
  • Tubing: Hydroformed 6061 alloy, Paradigm tubing
  • Dropouts: Sliding dropout disc system (SDDS) for 10 & 15mm axles, includes all hardware
  • Brake mounts: Flat mount disc brake only, not compatible with V-brakes
  • Cable routing: Internal
  • Head tube: Tapered 1-1/8" to 1.5" for integrated headset (125mm)
  • Seat tube: 9.1" (231mm), 27.2mm seat post
  • Seat clamp: For 31.8mm ID seat clamp
  • Wheel size: 20" (406mm) x 1.75"
  • Weight: 1.78kg

Radio Raceline Quartz 2025 Pro XXXXL Frame

Brand: Radio Raceline SKU:

$1,499.99 AUD

Or 4 payments of $374.99 AUD with

Colour - Spectral Abyss Blue

Top Tube Length - 22.5

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

Radio Raceline Quartz 2025 Pro XXXXL Frame - Spectral Abyss Blue / 22.5

$1,499.99 AUD

Price match request

$12.99 flat-rate shipping Australia-wide

Express from $21.99

Free in-store pickup - Brisbane

Availability

22.5
Matte Black
Space Green
Spectral Abyss Blue

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

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