Description

The Forecaster rides, feels and looks like a pro-level bike: a 100% chromoly frame with a 20.5" top tube, an integrated 1-1/8" head tube, removable brake hardware and fully sealed hubs front and rear.

Aaron Ross's signature version comes in Gloss Fluorescent Yellow with pink decals, spec'd with his Odyssey Keyboard v1 grips, an Odyssey Slugger Big Stitch seat, a Clutch v2 freecoaster hub, Twisted Pro pedals, Path Pro 2.40" tyres and Stage 1 rims.

Features

Pro-level spec, chromoly frame. A 100% chromoly frame with a 20.5" top tube, integrated 1-1/8" head tube and removable brake hardware.
Odyssey Clutch v2 freecoaster. Roll backwards without the cranks turning, on sealed hubs front and rear that keep the wheels spinning smoothly.
Aaron's own cockpit and seat. Odyssey Keyboard v1 grips and a Slugger Big Stitch Pivotal seat, the parts Aaron rides himself.
Path Pro tyres on Stage 1 rims. Odyssey Path Pro OEM 2.40" rubber gives a wide, grippy footprint on rims built to take hits.
Springfield brakes, Sabertooth sprocket. An Odyssey Springfield U-brake and lever for control, and a steel Sunday Sabertooth v2 25T sprocket that shrugs off grinds.

Specifications

Size: 20" wheels, 20.5" top tube
Frame: Sunday Forecaster, 100% chromoly with integrated 1-1/8" head tube and removable brake hardware
Top tube: 20.5"
Fork: Sunday Forecaster, 20", 2-piece chromoly steerer tube with welded pre-load
Headset: FSA integrated conical, 1-1/8"
Stem: Sunday Freeze front load, 48mm
Bars: Sunday, 2-piece
Grips: Odyssey Keyboard v1
Brakes: Odyssey Springfield U-brake
Brake lever: Odyssey Springfield
Sprocket: Sunday Sabertooth v2, 25T, steel
Pedals: Odyssey Twisted Pro
Front hub: Sealed
Rear hub: Odyssey Clutch v2 freecoaster, sealed
Rims: Odyssey Stage 1
Tyres: Odyssey Path Pro OEM, 2.40"
Seat: Odyssey Slugger Big Stitch, Pivotal
Seat post: Sunday Pivotal
Seat clamp: Sunday
Colour: Gloss Fluorescent Yellow with pink decals
Note: Alloy top cap: Sunday M16, aluminium. Brake cable: Odyssey Quik Slic.

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

Name: Sunday Forecaster (Aaron Ross) 20 Inch Bike
Brand: Sunday
SKU: SUBK238-26-YEL
Price: 1199.99 AUD
Availability: InStock

Brand: Sunday SKU: Click to copy the SKU and show the pick location

$1,199.99 AUD

Or 4 payments of $299.99 AUD with

Colour - Gloss Fluroescent Yellow

Top Tube Length - 20.5

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 height	Wheel size	Top tube
60 to 91cm	12"	12 to 12.5"
81 to 106cm	14"	14 to 14.5"
96 to 122cm	16"	16 to 16.5"
122 to 147cm	18"	18 to 18.5"
147 to 157cm	20"	19.75 to 20.25"
157 to 168cm	20"	20 to 20.5"
168 to 175cm	20"	20.25 to 20.75"
175 to 183cm	20"	20.5 to 21"
183 to 190cm and up	20"	20.75 to 21.5"
160cm and up	22"	21 to 22.25"
160cm and up	24"	21.75 to 22"
160cm and up	26"	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