A Radio Raceline Quartz Disc Pro XXXL Frame on a white background.
A Radio Raceline Quartz Disc Pro XXXL Frame with a disc brake on a white background.

Highlights

  • Flat mount disc brake only
  • Internal cable routing
  • Sliding dropout disc system
  • 200g lighter than the Helium

Description

The Quartz Disc Pro XXXL is a disc brake specific race frame in hydroformed 6061 alloy with Paradigm tubing. There are no V-brake mounts at all: braking runs off a flat mount 120mm calliper, with the line routed internally through the frame.

Pro XXXL sits at the long end of the range, with a 22.25" top tube and a 14.8" minimum chain stay set by the forged and CNC machined sliding dropouts. Those dropouts take 10 and 15mm axles only and carry an integrated chain tensioner.

Features
  • Flat mount disc brake only. A flat mount 120mm calliper keeps the rear of the frame neat and compact, and this frame is not compatible with V-brakes.
  • Internal cable routing. The brake line runs inside the frame, part of the disc specific build of this Quartz.
  • Sliding dropout disc system. Forged and CNC machined sliding dropouts with an integrated chain tensioner, for 10 and 15mm axles only.
  • 200g lighter than the Helium. Hydroformed 6061 alloy with Paradigm tubing makes this a super lightweight frame, so there is less to haul out of the gate.
  • Long Pro XXXL geometry. A 22.25" top tube and 14.8" minimum chain stay for taller riders, on a frame with two world championship wins behind it.

Specifications
  • Sizes: Pro XXXL
  • Top tube: 22.25" (565mm) actual
  • Chainstay: 14.8" (376mm) minimum
  • Head tube angle: 74°
  • Seat tube angle: 71°
  • Bottom bracket height: 11.6"
  • Bottom bracket: Euro, threaded, BSA 68mm
  • Material: Hydroformed 6061 alloy
  • Tubing: Paradigm
  • Dropouts: Sliding dropout disc system for 10 and 15mm axles, integrated chain tensioner
  • Brake mounts: Flat mount 120mm disc, not compatible with V-brakes
  • Cable routing: Internal
  • Head tube: Full integrated, tapered 1-1/8" to 1.5" (125mm)
  • Seat tube: 231mm, 27.2mm seat post
  • Axle size: 10 and 15mm only
  • Wheel size: 20 x 1.75"
  • Weight: 1.655g
  • Note: Rider area 564.2mm

Radio Raceline Quartz Disc Pro XXXL Frame

Brand: Radio Raceline SKU:

$853.00 USD

Or 4 payments of $213.25 USD with

Colour - Spectral Silver

Top Tube Length - 22.25

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

Radio Raceline Quartz Disc Pro XXXL Frame - Spectral Silver / 22.25

$853.00 USD

Price match request

$12.99 flat-rate shipping Australia-wide, Express from $21.99

Free in-store pickup - Brisbane

Availability

22.25
Black
Spectral Silver

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

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