A Subrosa MRIII Frame in the Bjarki Hardarson colorway is displayed against a white background.
The Subrosa MRIII Frame (Bjarki Hardarson Colorway) is shown in blue, featuring an iceberg graphic on the head tube with an Icelandic flag visible in the background.
Close-up of the Subrosa MRIII Frame (Bjarki Hardarson Colorway) in blue chromoly, featuring a cartoon polar bear, Scandinavian flag, and unique graphics on the head tube.
Close-up of the Subrosa MRIII Frame (Bjarki Hardarson Colorway) in blue, highlighting the chromoly welded joint where the top tube, seat tube, and seat stay connect, with part of a seat tube decal visible.
Close-up of a blue Subrosa MRIII Frame (Bjarki Hardarson Colorway) highlighting the welded joints and tubing at the bottom bracket area.

Highlights

  • Low 11.3" bottom bracket
  • Long, adjustable back end
  • Neutral 75° and 71° geometry
  • Removable brake mounts and gyro tabs

Description

Matt Ray has been part of BMX and Subrosa for a long time, and the MRIII is the latest version of his signature frame. It is not a big departure from the last one: he fine tuned a few specs, lowering the bottom bracket height and adding a longer top tube option, and there are new decals too.

A low 11.3" bottom bracket and a long back end at 13.3" to 14" mean it should be right at home in the deep end, while the 75° head tube and 71° seat tube keep the geometry neutral and responsive for all kinds of riding. Chromoly construction, 14mm dropouts, a mid bottom bracket and an integrated seat post clamp round it out.

Features
  • Low 11.3" bottom bracket. Sits you down in the bike, which is what you want when the terrain gets deep.
  • Long, adjustable back end. Chainstays run from 13.3" to 14", so you can set the rear wheel where you want it.
  • Neutral 75° and 71° geometry. Responsive but stable, which makes it a good all round frame rather than one built for a single style.
  • Removable brake mounts and gyro tabs. Run it clean and brakeless, or bolt the hardware back on later, sold separately.
  • Chromoly build, integrated seat clamp. High quality chromoly throughout, with 14mm dropouts, a mid bottom bracket and a built in seat post clamp.

Specifications
  • Chainstay: 13.3" to 14"
  • Head tube angle: 75°
  • Seat tube angle: 71°
  • Bottom bracket height: 11.3"
  • Bottom bracket: Mid
  • Material: Chromoly
  • Dropouts: 14mm
  • Brake mounts: Removable, removable gyro tabs, both sold separately
  • Head tube: Integrated headset
  • Seat clamp: Integrated
  • Wheel size: 20"

Subrosa MRIII Frame (Bjarki Hardarson Colorway)

Brand: Subrosa SKU:

$819.99 AUD

Or 4 payments of $204.99 AUD with

Colour - Glacier Blue

Top Tube Length - 20.75

20 inch BMX frame sizing

Frames are sized by top tube length. Start with your height, then let riding style decide where in the range you land.

Rider heightTop tube
147 to 157cm19.75 to 20.25"
157 to 168cm20 to 20.5"
168 to 175cm20.25 to 20.75"
175 to 183cm20.5 to 21"
183 to 190cm and up20.75 to 21.5"

The height bands overlap on purpose. If you land in two of them, riding style breaks the tie: longer for flow, trails and transitions, shorter for technical street and park. Plenty of riders, pros included, deliberately ride longer than a chart suggests.

How to measure

Top tube is measured from the centre of the seat tube to the centre of the head tube, so it is not the length of the tube you can see. Measure your current frame that way and compare.

  • Size up for stability through trails and transitions.
  • Size down if you want the bike quick and twitchy for spins and grinds.
  • Top tube is fixed once you buy, but chainstay length, stem length, fork offset and bar position all change how the built bike feels.

Not sure? Tell us your height and how you ride, and we will tell you what we would put you on.

Read the full buying guide

20 inch BMX frame sizing

Frames are sized by top tube length. Start with your height, then let riding style decide where in the range you land.

Rider heightTop tube
147 to 157cm19.75 to 20.25"
157 to 168cm20 to 20.5"
168 to 175cm20.25 to 20.75"
175 to 183cm20.5 to 21"
183 to 190cm and up20.75 to 21.5"

The height bands overlap on purpose. If you land in two of them, riding style breaks the tie: longer for flow, trails and transitions, shorter for technical street and park. Plenty of riders, pros included, deliberately ride longer than a chart suggests.

How to measure

Top tube is measured from the centre of the seat tube to the centre of the head tube, so it is not the length of the tube you can see. Measure your current frame that way and compare.

  • Size up for stability through trails and transitions.
  • Size down if you want the bike quick and twitchy for spins and grinds.
  • Top tube is fixed once you buy, but chainstay length, stem length, fork offset and bar position all change how the built bike feels.

Not sure? Tell us your height and how you ride, and we will tell you what we would put you on.

Read the full buying guide

Subrosa MRIII Frame (Bjarki Hardarson Colorway) - Glacier Blue / 20.75

$819.99 AUD

Price match request

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

Free in-store pickup - Brisbane

Availability

20.7521
Glacier Blue

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

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