The Sunday Wavelength Frame, Gary Young's signature BMX in matte gold with the "Sunday" logo on the downtube, features durable chromoly and is shown against a white background.
Sunday Wavelength Frame - black. Featuring the Gary Young Signature Geometry and made from a high-quality 4130 chromoly frame.
A white Sunday Wavelength frame, featuring Gary Young Signature Geometry, on a white background.
A black bike frame with a Sunday Wavelength Frame logo.
A white bicycle frame with a Sunday Wavelength Frame logo on it.
A pair of Sunday Wavelength Frames, made of 4130 chromoly, on a white background.
A close up image of a Sunday Wavelength Frame.
A black Sunday Wavelength frame with a white logo on it.
A close up of a bike frame featuring the Gary Young Signature Geometry and the logo of the Sunday Wavelength Frame brand.
A close up of a black Sunday Wavelength Frame bicycle frame.
A close up of a Sunday Wavelength Frame bicycle frame.
Close-up of a Sunday Wavelength Frame—matte gold chromoly BMX frame featuring a black logo and text near the head tube.
Close-up of a gold-colored Sunday Wavelength Frame, highlighting the welded joints where the top tube, seat tube, and seat stay meet.
Close-up of the Sunday Wavelength Frame in metallic gold 4130 chromoly, highlighting the bottom bracket area with visible welds and bold black graphics.
Close-up of the rear dropouts on a metallic gold Sunday Wavelength Frame, highlighting the axle slots and "SUNDAY" branding embossed on durable 4130 chromoly.

Highlights

  • Gary Young signature geometry
  • Wave shaped down tube
  • Mitre cut top tube
  • Hollow 8mm dropouts

Description
Introducing Gary Young's signature Wavelength frame.
With a longer rear end and top-tube options, this frame is designed for riders who love to go fast and want a more stable ride for trails and transitions.

Features
  • Gary Young signature geometry. A longer rear end and four top tube options, aimed at riders who like to go fast and want a stable ride on trails and transitions.
  • Wave shaped down tube. The double-butted 1.45" down tube uses Sunday's Wave shaping to fight the dents that rails, ledges and coping put into a front end.
  • Mitre cut top tube. Cutting the top tube to meet the seat stays precisely makes that critical junction substantially stronger than a sandwiched joint.
  • Hollow 8mm dropouts. As light as a solid 5mm dropout but over twice as strong, with a small internal tensioner that holds the wheel and simplifies removal.
  • Removable U-brake and gyro tabs. Run a brake and detangler if you want them, or strip the hardware off this 100% 4130 chromoly frame.

Specifications
  • Sizes: 20.75", 21", 21.25" and 21.5" top tube
  • Chainstay: 13.65" to 14"
  • Head tube angle: 75°
  • Seat tube angle: 71°
  • Standover: 9"
  • Bottom bracket height: 11.5"
  • Material: 100% 4130 chromoly
  • Tubing: 1.45" Wave shaped down tube, mitre cut top tube, tapered chain and seat stays angled inside for chain clearance
  • Butting: Double-butted down tube
  • Dropouts: Hollow 8mm, with internal chain tensioners
  • Brake mounts: Removable U-brake hardware and gyro tabs
  • Head tube: 5"
  • Tyre clearance: 2.4"

Sunday Wavelength Frame

Brand: Sunday SKU:

$699.99 AUD

Or 4 payments of $174.99 AUD with

Colour - Matt Black

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

Sunday Wavelength Frame - Matt Black / 20.75

$699.99 AUD

Price match request

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

Free in-store pickup - Brisbane

Availability

20.752121.25
Matt Black
Matt Cool Grey
Matte Metallic Gold

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

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