A Wethepeople Sinus Flatland 20 Inch Bike, featuring a black diamond-shaped frame, red handle grips, flatland-specific Mugen tires, and a padded seat.
The Wethepeople Sinus Flatland 20 Inch Bike in teal features black handlebars, a black seat, and flatland-specific Mugen tires, designed for tricks and stunts. The bike is displayed from a side angle against a white background.
Close-up of the Wethepeople Sinus Flatland 20 Inch Bike’s rear wheel with metal pegs, chain, spokes, and a "MUGEN" tire—showcasing aftermarket parts designed for enhanced flatland BMX performance.
Close-up of the handlebar stem and headset area, showing cables and part of the turquoise Wethepeople Sinus Flatland 20 Inch Bike frame with sleek aftermarket parts.
Close-up of the Wethepeople Sinus Flatland 20 Inch Bike, featuring black handlebars, a frame with the "WETHEPEOPLE" logo, and a front wheel fitted with flatland-specific Mugen tires with a "QUEEN" label, all set against a white background.
Close-up of a black seat with branding on a Wethepeople Sinus Flatland 20 Inch Bike, attached to the flatland frame.
Close-up of the rear wheel, chain, sprocket, brake caliper, and seat on the turquoise Wethepeople Sinus Flatland 20 Inch Bike.
Close-up of the Wethepeople Sinus Flatland 20 Inch Bike frame, highlighting the crank, chainring, and rear tire details, aftermarket metal components, and tread pattern.
Close-up of a turquoise Wethepeople Sinus Flatland 20 Inch Bike frame highlighting the bottom bracket, crank arm, and rear wheel tire.
Close-up view of the Wethepeople Sinus Flatland 20 Inch Bike's black crankset, chainring, chain, hybrid freecoaster hub, and pedal connected to the frame and rear wheel.
Close-up view of the Wethepeople Sinus Flatland 20 Inch Bike drivetrain, highlighting the chain, chainring, crank arm, pedal, rear wheel, and flatland-specific Mugen tires.
Close-up of the Wethepeople Sinus Flatland 20 Inch Bike handlebar with a red grip, black frame, and part of the seat and pedal visible against a white background, featuring flatland-specific Mugen tires.
Close-up of a Wethepeople Sinus Flatland 20 Inch Bike handlebar with brake lever, rubber grip, and visible seat and flatland-specific Mugen tire in the background.
Close-up of a black fork and tire on the Wethepeople Sinus Flatland 20 Inch Bike, with the "Eclat Mugen" logo visible on the flatland-specific tire sidewall against a white background.
Close-up of the Wethepeople Sinus Flatland 20 Inch Bike's front wheel, showing flatland-specific Mugen tires with "Mugen" branding, a black front brake, teal frame, and black fork.
The Wethepeople Sinus Flatland 20 Inch Bike in teal and black features front and rear pegs, flatland-specific Mugen tires, and a hybrid freecoaster hub, displayed against a white background.
The Wethepeople Sinus Flatland 20 Inch Bike features a black frame, red handlebar grips, thick Mugen flatland tires, a padded seat, and a hybrid freecoaster hub, displayed on a plain white background.

Description

The best complete flatland bike money can buy!

Wethepeople is proud to bolster its rich heritage and love of flatland with a brand-new complete bike model that’s dedicated to the flatland community. The sinus returns with utopia-inspired geometry, a full crmo construction, and a healthy dose of the latest aftermarket parts from wethepeople and eclat including the all new flatland-specific mugen tires and hybrid freecoaster hub. Coming equipped with x2 brake, a gyro and removable brake mounts for a clean look, the balance of high-quality construction and components make this bike a perfect fit for riders both new and familiar with the sport; allowing multiple generations of flatland riders to progress and learn on a bike capable of so much.

About the Brand
Wethepeople BMX began making its mark on history almost 15 years ago. Designing the first rough drawings of their frames and forks around the same time as the world started to see BMX in a different light, a time when rails were first grinded and the possibility that riding the streets was in fact the true way forward. To achieve their aims, Wethepeople knows exactly how to deploy their strengths with an efficiency that is unmatched in the BMX industry.

Features
  • Built purely for flatland. Utopia-inspired geometry with a 19" top tube, 12.5" chainstay, 12.2" bottom bracket height and a 0mm offset fork.
  • Hybrid freecoaster rear hub. The Wethepeople Hybrid runs a 9T freecoaster driver and converts to cassette, so one bike covers both ways of riding.
  • Four knurled alloy pegs fitted. 6061-T6 Sinus pegs at 4.35" by 37mm come on the bike front and rear, so there is nothing to add before riding.
  • Gyro with front and rear brakes. A Salt Am rotor with Salt Rookie alloy U-brakes and levers both ends, on removable brake pivots for a clean look.
  • Éclat Mugen flatland tyres. Flatland-specific 1.95" tyres on double wall Salt Beam Pro rims, with the complete bike at 10.66kg.

Specifications
  • Size: 20" wheels, 19" top tube
  • Frame: Wethepeople 'Sinus' frame, 4130 full Cr-Mo, tapered SS and CS, with removable brake pivots and guides
  • Top tube: 19"
  • Chainstay: 12.5"
  • Head tube angle: 75°
  • Seat tube angle: 71°
  • Standover: 6.22"
  • Bottom bracket height: 12.2"
  • Fork: Saltplus 'Sinus' fork, 4130 full Cr-Mo, 4130 Cr-Mo steerer, 0mm offset, with removable brake pivots
  • Headset: Salt 'Pro' int. headset, sealed bearing
  • Stem: Salt 'Junior' topload stem, 40mm reach
  • Bars: Saltplus 'Sinus' bar, 2pc, 4130 full Cr-Mo, lowered crosstube
  • Grips: Salt 'Ex' grips, 154mm, flangeless
  • Brakes: Salt 'Rookie' alloy U-brake, front and rear
  • Brake lever: Salt 'Rookie' alloy brake lever, front and rear
  • Cranks: Saltplus 'Ultra' square profile 3pc 'TSS' crank, Cr-Mo, 165mm, 8 spline
  • Bottom bracket: Salt 'Spanish' BB, 19mm, press fit, sealed bearing
  • Sprocket: Salt 'Gateway' sprocket, alloy, 25T
  • Chain: Salt 'Am' chain, Z1 type
  • Pedals: Éclat 'Surge' pedals, nylon/fibreglass
  • Front hub: Wethepeople 'Sinus' hub, fully sealed, 3/8"S male axle, 36H
  • Rear hub: Wethepeople 'Hybrid' freecoaster hub, fully sealed, converts to cassette, 9T, 14mm axle, 36H
  • Rear cog: 1pc freecoaster driver, 9T, sealed bearing
  • Rims: Salt 'Beam Pro' rim, double wall, 36H, front and rear
  • Tyres: Éclat 'Mugen' tyres, 1.95", front and rear
  • Seat: Wethepeople 'Sinus' pivotal seat
  • Seat post: Salt 'Am' pivotal seat post, alloy, 200mm
  • Seat clamp: Integrated seat clamp
  • Pegs: Wethepeople 'Sinus' pegs, knurled surface, 6061-T6 alloy, 4.35" x 37mm, 4 pegs
  • Weight: 10.66kg
  • Note: Comes with a Salt 'Am' rotor gyro fitted.

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.

Wethepeople Sinus Flatland 20 Inch Bike

Brand: Wethepeople SKU:

$1,399.99 AUD

Or 4 payments of $349.99 AUD with

Recommended Rider Height:

147cm+

Colour - Black

Top Tube Length - 19

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
$1,399.99 AUD

Price match request

Wethepeople Sinus Flatland 20 Inch Bike - Black / 19

Metro bike shipping from $59.99

Regional and remote rates may differ

Free in-store pickup - Brisbane

Availability

19
Fresh Mint
Black

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

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