Sunday Forecaster Aaron Ross 20 Inch Bike (2023) / Gloss White / 20.5TT

Highlights

  • Short 20.5" top tube
  • Aaron Ross signature parts
  • Odyssey Clutch V2 freecoaster
  • 160mm three piece chromoly cranks

Description

Aaron Ross is back with his signature Forecaster, built on a 100% chromoly frame with an integrated 1-1/8" head tube and removable brake hardware. The shorter 20.5" top tube makes it a good first bike for a rider who wants high end componentry in a smaller fit.

His signature parts are here too: Odyssey Keyboard 2 dual-compound grips and an Odyssey Aaron Ross Pivotal seat. Behind them sit 160mm three piece chromoly cranks, an Odyssey Clutch V2 freecoaster, Odyssey Springfield brakes and 2.4" Path Pro OEM tyres on Stage 1 rims.

Features
  • Short 20.5" top tube. A smaller front end suits shorter riders and anyone starting out, without giving up the full chromoly Forecaster frame.
  • Aaron Ross signature parts. Odyssey Keyboard 2 dual-compound grips and an Odyssey Aaron Ross Pivotal seat come fitted straight out of the box.
  • Odyssey Clutch V2 freecoaster. Roll backwards with the cranks staying still, so fakies and switch riding come easily as your skills build.
  • 160mm three piece chromoly cranks. Shorter cranks match the smaller frame, and three piece chromoly is the strongest way to build the drive side.
  • Removable brake hardware. The Odyssey Springfield U-brake and lever are fitted, and the mounts come off if you want a clean frame later.

Specifications
  • Size: 20.5" top tube
  • Frame: Sunday Forecaster, 20.5" TT, 100% chromoly with integrated 1-1/8" head tube and removable brake hardware
  • Top tube: 20.5"
  • Chainstay: 13.2-13.5"
  • Head tube angle: 75.5°
  • Seat tube angle: 71°
  • Standover: 9"
  • Bottom bracket height: 11.7"
  • Fork: Sunday Forecaster, 20", 2-piece chromoly steerer tube with welded pre-load
  • Headset: FSA integrated conical, 1-1/8"
  • Stem: Sunday Freeze top load, 48mm
  • Bars: Sunday, 2-piece, 9" rise, 28.5" width, 12° backsweep, 4° upsweep
  • Grips: Odyssey Keyboard 2 dual-compound
  • Brakes: Odyssey Springfield U-brake with Odyssey Quik Slic cable
  • Brake lever: Odyssey Springfield
  • Cranks: 160mm, 3-piece, chromoly
  • Bottom bracket: Sealed, mid, 19mm
  • Sprocket: Sunday Sabertooth V2, 25T, steel
  • Chain: KMC Z1 wide
  • Pedals: Odyssey Twisted PC Pro
  • Front hub: Sunday, 36H, low-flange, sealed, 3/8" female axle
  • Rear hub: Odyssey Clutch V2 freecoaster, 36H, 14mm female axle with 9T driver, RHD, non-drive side plastic guard
  • Rims: Odyssey Stage 1, 20", 36H
  • Tyres: Odyssey Path Pro OEM, 20 x 2.4" (front and rear)
  • Seat: Odyssey Aaron Ross, Pivotal
  • Seat post: Sunday Pivotal
  • Seat clamp: Sunday

Assembly information

Your 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
  • Check the brakes and tyre pressure before the first ride

Tools: Allen key set and a 15mm, 17mm or 19mm spanner for the pedals and axle nuts (bikes can vary between these three sizes). A socket is needed if installing pegs.

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.

Sunday Forecaster Aaron Ross 20 Inch Bike (2023)

Brand: Sunday SKU:

$1,099.99 AUD

Or 4 payments of $274.99 AUD with

Recommended Rider Height: 168 to 183 cm

Colour - Gloss White

Top Tube Length - 20.5

20 inch BMX sizing

A 20 inch bike is the standard adult BMX and suits riders from about 147cm up. At this wheel size the top tube is what changes the fit, so pick that by height.

Rider heightWheel sizeTop tube
60 to 91cm12"12 to 12.5"
81 to 106cm14"14 to 14.5"
96 to 122cm16"16 to 16.5"
122 to 147cm18"18 to 18.5"
147 to 157cm20"19.75 to 20.25"
157 to 168cm20"20 to 20.5"
168 to 175cm20"20.25 to 20.75"
175 to 183cm20"20.5 to 21"
183 to 190cm and up20"20.75 to 21.5"
160cm and up22"21 to 22.25"
160cm and up24"21.75 to 22"
160cm and up26"22 to 23"

Sizes overlap on purpose, so personal preference comes into it. If you land in two bands, riding style breaks the tie: longer for flow, trails and transitions, shorter for technical street and park.

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.

Top tube is measured from the centre of the seat tube to the centre of the head tube, so it is not the same as the length of the tube you can see.

  • A 20 inch bike is the standard adult BMX and most riders end up there, so do not size a tall child down to a smaller wheel.
  • 22, 24 and 26 inch bikes are adult bikes with a bigger wheel, not bigger frames for taller riders.
  • 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, but stem length, fork offset and bar position all shift how roomy the bike feels once you are on it.

Not sure? Send us their height and we will tell you what we would put them on.

Read the full buying guide

20 inch BMX sizing

A 20 inch bike is the standard adult BMX and suits riders from about 147cm up. At this wheel size the top tube is what changes the fit, so pick that by height.

Rider heightWheel sizeTop tube
60 to 91cm12"12 to 12.5"
81 to 106cm14"14 to 14.5"
96 to 122cm16"16 to 16.5"
122 to 147cm18"18 to 18.5"
147 to 157cm20"19.75 to 20.25"
157 to 168cm20"20 to 20.5"
168 to 175cm20"20.25 to 20.75"
175 to 183cm20"20.5 to 21"
183 to 190cm and up20"20.75 to 21.5"
160cm and up22"21 to 22.25"
160cm and up24"21.75 to 22"
160cm and up26"22 to 23"

Sizes overlap on purpose, so personal preference comes into it. If you land in two bands, riding style breaks the tie: longer for flow, trails and transitions, shorter for technical street and park.

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.

Top tube is measured from the centre of the seat tube to the centre of the head tube, so it is not the same as the length of the tube you can see.

  • A 20 inch bike is the standard adult BMX and most riders end up there, so do not size a tall child down to a smaller wheel.
  • 22, 24 and 26 inch bikes are adult bikes with a bigger wheel, not bigger frames for taller riders.
  • 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, but stem length, fork offset and bar position all shift how roomy the bike feels once you are on it.

Not sure? Send us their height and we will tell you what we would put them on.

Read the full buying guide

Sunday Forecaster Aaron Ross 20 Inch Bike (2023) - Gloss White / 20.5

$1,099.99 AUD

Price match request

  • Arrives mostly assembled. Most people finish it in 10 to 20 minutes.
  • Pay in 4 with PayPal on orders under $2,000: 4 interest-free payments of $274.99, one every two weeks, with no late fees. How it works

Bike shipping from $39.99All rates

Free in-store pickup - Brisbane

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