A matte green Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature BMX, featuring a 100% chromoly frame, black handlebars and tires, and a black-and-white patterned seat, displayed from the side on a white background.
A green Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature, featuring a 100% chromoly frame, black handlebars, black saddle, and black tires, is parked on an asphalt surface near a closed garage door—offering the pro-level strength and reliability expected from Brett Silva’s signature BMX.
Close-up of the matte green Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature, constructed with a 100% chromoly frame for exceptional durability and performance, featuring black tires, black pedals, and a glimpse of the front wheel resting on a paved surface—an elite BMX bike designed for pro-level riding.
Close-up view of a black handlebar and seat of a green Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature, featuring “Sunday” branding on the handlebar and a robust 100% chromoly frame, positioned on a concrete surface.
Close-up of a matte green Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature pro-level BMX frame with a sticker that reads “100% Chromoly Frame.”.
Close-up of a pro-level BMX handlebar stem featuring the “Sunday” brand name engraved and printed on the components, securely fastened with bolts. This signature detail is found on the Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature, renowned for its 100% chromoly frame.
Close-up of a bicycle seat with a dark, speckled fabric cover and stitched logo, mounted on the 100% chromoly frame of the vibrant green Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature pro-level BMX, with part of the rear tire visible.
The Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature features a vibrant orange frame with black handlebars, seat, tires, and forks. Built with a 100% chromoly frame for exceptional durability and strength, this pro-level BMX bike—viewed from the side against a white background—draws inspiration from the Brett Silva Forecaster series.
The Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature is a pro-level BMX bike with a green 100% chromoly frame, black wheels, and a tan seat, shown from the side on a white background.
A Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature is displayed indoors against a tan wall with the word “Sunday” on it. This pro-level BMX bike features an orange frame, black wheels and handlebars, and boasts a 100% chromoly construction for enhanced strength and durability.
Close-up of the Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature’s black sprocket, chain, and crank arm on an orange full chromoly frame, with partial Brett Silva Forecaster branding visible.
Close-up of a black ODI bicycle handlebar grip with ridged texture, attached to the vibrant orange Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature in the background.
Close-up of an orange BMX bicycle frame displaying the brand “SUNDAY” and model name “FORECASTER” in white lettering, with black pedals and tires visible in the background. The Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature is a pro-level BMX bike featuring a 100% chromoly frame, exemplifying strength and quality in this signature edition.
Close-up of a black bicycle wheel rim with black spokes and a green sticker labeled “STAGE 1.” The Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature is a pro-level BMX bike, featuring robust details ideal for serious riders.
Close-up of a black bicycle seat with the Sunday Bikes logo, with part of the orange Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature frame and rear wheel visible in the background. This pro-level BMX bike features a 100% chromoly frame for maximum strength and performance.
Close-up of a black bicycle pedal attached to a crank arm, with part of the bike chain and an out-of-focus background visible—highlighting the robust build you’d expect from a pro-level BMX like the Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature, which features a full 100% chromoly frame.
Close-up of a bicycle wheel showing black spokes, a tire labeled “ODYSSEY,” and a black fork with “Sunday” in yellow lettering—part of the Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature, featuring a 100% chromoly frame.
Close-up of a black hub with silver text and a geometric logo, surrounded by black spokes and orange accents—an integral component of the pro-level Sunday Forecaster 20 Inch Bike (2025), Brett Silva Signature.
The Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature is a pro-level BMX bike featuring a green 100% chromoly frame, tan seat, black handlebars, and black tires, shown in profile view against a white background.
A side view of the Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature, featuring a green frame, black tires, and a black seat. Built with a 100% chromoly frame for maximum durability, this pro-level BMX bike is also shown in two small inset images highlighting red and dark green color options.
Brett Silva’s Sunday Forecaster 20 Inch Bike (2025) in red, featuring black handlebars, seat, and tires, is parked on a paved surface. Built with a 100% chromoly frame for enhanced durability, this pro-level BMX model displays only the frame logo with no additional visible accessories or branding.
A Sunday Forecaster 20 Inch Bike (2025), Brett Silva Signature edition, featuring a red 100% chromoly frame with pro-level features, black tires, and handlebars, is parked on a paved street in an urban setting with buildings and trees in the background.
The Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature is a pro-level green BMX bike featuring a tan seat, black handlebars, pedals, and tires. Showcased indoors in front of a brown wall with “Sunday” written on it, this model boasts a 100% chromoly frame for exceptional strength and durability—making it an ideal choice for serious riders.
Close-up view of the Brett Silva Signature Sunday Forecaster 20 Inch Bike (2025) in red, featuring “Forecaster” and “Sunday” graphics on its 100% chromoly frame, with part of the rear wheel and asphalt ground visible—ideal for riders seeking a pro-level BMX experience.
Close-up view of a green Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature, showcasing the “FORECASTER” graphics and focusing on the chain, rear wheel, and part of the front wheel in an indoor setting. The full 100% chromoly frame emphasizes its strength and durability, underscoring its status as a true pro-level BMX bike.
Front view of a red Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature BMX, featuring black handlebars, pedals, and front tire on a gray paved surface, with a sturdy 100% chromoly frame.
Close-up of the Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature’s pro-level handlebars and front frame, with stacked cardboard boxes labeled “Sunday” in the background. This model features a 100% chromoly frame for maximum strength and performance.
Close-up of a red Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature frame, displaying the “Sunday” logo along with the rear wheel, chain, and pedals, set against a backdrop of street and buildings. The 100% chromoly construction underscores its durability and top-tier performance for dedicated BMX riders.
Close-up of a pro-level BMX crankset, chainring, and chain against a yellow background; part of the 100% chromoly frame and rear wheel of the Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature is visible.
Close-up of a black bicycle pedal attached to a crank arm, with portions of the 100% chromoly frame and chain visible in the background—highlighting the rugged quality of the Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature pro-level BMX.
Close-up of a red 100% chromoly frame on the Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature, featuring a metallic sticker that reads “Made in Vietnam,” with part of a wheel visible in the background—highlighting the quality craftsmanship of this pro-level BMX bike.
Close-up of a bicycle handlebar and stem with “Sunday” branding, mounted on the red Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature frame, photographed outdoors on a grey surface. This pro-level BMX bike features a 100% chromoly frame for exceptional strength and durability.
Close-up of a black Odi bike handlebar grip with fine ridges, mounted on a red Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature pro-level BMX with a 100% chromoly frame, and pavement visible in the background.
Close-up of a black ribbed bicycle handlebar grip with “ODSY” lettering, attached to the green Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature— a pro-level BMX featuring a 100% chromoly frame.
Close-up of a black handlebar grip with “ODSY” text, mounted on the Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature, which features a green and black 100% chromoly frame. The background is blurred.
A close-up of the black and pink speckled seat on the Sunday Forecaster 20 Inch Bike (2025) Brett Silva Signature, featuring a red 100% chromoly frame against a blurred gray pavement background.
A close-up of a tan seat with a diamond pattern, mounted on the Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature—an advanced BMX featuring a green and orange 100% chromoly frame—viewed from above on a concrete floor.
Close-up of the 2025 Sunday Forecaster 20 Inch Bike (Brett Silva Signature) in red, highlighting the “Brett Silva” text near the rear wheel, black spokes, and a blurred pavement background—a pro-level BMX bicycle with a 100% chromoly frame.
Close-up of the green Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature, a pro-level BMX model constructed from 100% chromoly; “Brett Silva” is printed on the frame, and a blurred black wheel with white “ODYSSEY” text is visible in the background.
Close-up of a metallic green Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature frame, featuring the name “BRETT SILVA” in yellow letters. The 100% chromoly construction demonstrates its pro-level BMX bike quality, with black spokes visible in the background.
Close-up of the rear hub with black spokes, visible logo, chain, and part of a green Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature pro-level BMX frame.
Close-up of a black bicycle wheel hub with spokes radiating outward. The hub, featuring the “Sunday” brand, is part of the Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature—a pro-level BMX—shown outdoors on a concrete surface.
Close-up of a black hub featuring the “SUNDAY” logo, laced with black spokes and partially revealing the gear cassette on the Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature pro BMX.
Close-up of a black bicycle hub labeled “Sunday,” with black spokes and part of a red frame from the Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature, highlighting its 100% chromoly construction against a blurred outdoor background—ideal for riders looking for a pro-level BMX ride.
Close-up of the green fork with the “Sunday” logo on the Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature, showing black spokes, axle, and part of the front wheel on a gray surface—this pro-level BMX bike is designed for riders seeking strength and style.
Close-up of a bicycle front wheel with black spokes, Odyssey tire, and a Shadow fork on a brown concrete floor—part of the Sunday Forecaster 20 Inch Bike (2025), the Brett Silva Signature pro-level BMX with a 100% chromoly frame.
Close-up of a black bicycle wheel on pavement, featuring “ODYSSEY” branding and detailed tire tread—the perfect complement to the Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature, a pro-level BMX with a 100% chromoly frame.
Close-up of a bicycle wheel with black spokes and a green circular sticker labeled “Stage 1” on the rim, set against gray pavement—part of the Sunday Forecaster 20 Inch Bike (2025), Brett Silva Signature, renowned for its 100% chromoly frame.
Close-up of the Sunday Forecaster 20 Inch Bike (2025) Brett Silva Signature model’s pro-level wheel rim, featuring black spokes and a green sticker labeled “Stage 1” and “36H” near the tire, highlighting its rugged quality.
Close-up of a bicycle tire displaying the brand name “Odyssey” and a recommended pressure range of 35–65 PSI on the sidewall, as featured on the Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature.
Close-up of a black bicycle tire labeled “Odyssey” with a pressure range of “35-65 PSI,” mounted on a wheel with visible spokes and valve stem, featured on the Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature, known for its pro-level 100% chromoly frame.
The Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature is a pro-level BMX featuring a red 100% chromoly frame with the “Sunday” logo in white script. This bike includes black handlebars, black wheels, and a patterned black seat, and is shown against a plain white background.

Description

Built tough. Rides smooth. Silva style.

The 2025 Brett Silva Forecaster brings pro-level performance and style to a dialled complete. With a 20.75" top tube, full 100% chromoly frame, and a stacked parts list, it’s built to hit everything from rails to local lines.

Outfitted with Odyssey Broc grips, Twisted Pro pedals, Path Pro tyres, and the signature Sunday Silva seat, this thing is ready to handle real riding right out of the box.

The Forecaster is a model that rides, feels and looks like a pro-level bike and it's been upgraded to a full 100% chromoly frame.
This one is Brett Silva's signature model. You’ll find Signature spec’d design cues like the Odyssey Broc Signature Grips, combined with incredible parts like Odyssey Twisted Pro pedals, and Path Pro tyres.
A truly dialled bike for every style of riding.

Features
  • 20.75" top tube, chromoly frame. A full 100% chromoly frame with an integrated 1-1/8" head tube and removable brake hardware, built to hit everything from rails to local lines.
  • Sealed hubs with a 9T driver. A sealed cassette rear hub on a 14mm axle and a sealed low-flange front, so the wheels keep rolling smooth.
  • Odyssey Springfield brakes and lever. A U-brake with a Quik Slic cable gives you proper control, and the hardware comes off if you go brakeless.
  • Path Pro 2.4" tyres. Wide Odyssey rubber front and rear on Stage 1 36H rims, for grip and cushioning on rough ground.
  • Silva signature finishing kit. Sunday Silva pivotal seat, Odyssey Broc grips, Twisted PC Pro pedals, a Freeze top load stem and 170mm 3-piece chromoly cranks.

Specifications
  • Size: 20" wheels
  • Frame: Sunday Forecaster, 100% chromoly, integrated 1-1/8" head tube, removable brake hardware
  • Top tube: 20.75"
  • Chainstay: 13.2 to 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, 4-piece, 9" rise, 28.5" wide, 12° backsweep, 4° upsweep
  • Grips: Odyssey Broc Raiford
  • Brakes: Odyssey Springfield U-brake, Odyssey Quik Slic cable
  • Brake lever: Odyssey Springfield
  • Cranks: 170mm, 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: Sunday cassette, 36H, sealed, 14mm male axle with 9T driver, RHD
  • Spokes: 14g steel, black
  • Rims: Odyssey Stage 1, 20", 36H
  • Tyres: Odyssey Path Pro OEM, 20 x 2.4" front and rear
  • Seat: Sunday Silva, pivotal
  • Seat post: Sunday pivotal
  • Seat clamp: Sunday
  • Weight: 12.14 kg (with brakes)
  • Note: Includes a Sunday M16 aluminium alloy cap. Handlebar geometry listed is quoted for the Matt Fire Engine Red colourway.

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 20 Inch Bike (2025) / Brett Silva Signature

Brand: Sunday SKU:

$1,199.99 AUD

Or 4 payments of $299.99 AUD with

Colour - Matt Seaweed Green

Top Tube Length - 20.75

Drive Side - Right Hand Drive

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
$1,199.99 AUD

Price match request

Sunday Forecaster 20 Inch Bike (2025) / Brett Silva Signature - Matt Seaweed Green / 20.75 / Right Hand Drive

Metro bike shipping from $59.99

Regional and remote rates may differ

Free in-store pickup - Brisbane

Availability

20.75
Matte Sage Green
Matt Seaweed Green

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

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