The Colony Horizon 18 Inch Bike features a lightweight purple alloy frame, black handlebars, seat, and tires, shown from the side against a white background.
The Colony Horizon 18 Inch Bike is a BMX Freestyle model with a lightweight alloy frame, black seat, handlebars, and tires, displayed in profile view against a white background.
The Colony Horizon 18 Inch Bike, shown in profile on a white background, features black handlebars, saddle, and tires, plus a lightweight alloy frame for easy handling.
A Colony Horizon 18 Inch Bike in purple, featuring black handlebars, a seat, and tires, is viewed from the side, embodying the spirit of BMX Freestyle.
A side view of the Colony Horizon 18 Inch Freestyle BMX Bike, featuring silver color with black handlebars, seat, and tires.
The Colony Horizon 18 Inch Bike boasts a lightweight alloy frame, robust tires, a padded seat, and straight handlebars, all showcased against a pristine white backdrop.
The Colony Horizon 18 Inch Bike, featuring a transparent frame with black handlebars, seat, and tires, is displayed in profile against a white background.
A Colony Horizon 18 Inch Bike in red, featuring black handlebars, seat, and tires, is photographed on a white background.
The Colony Horizon 18 Inch Bike is a purple BMX Freestyle bike with black handlebars, seat, and tires, featuring a lightweight alloy frame, displayed against a plain white background.
Close-up view of the Colony Horizon 18 Inch Bike in purple with a lightweight alloy frame, seat, rear wheel, chain, and brake cables visible against a white background—ideal for freestyle Olympic riders.
The Colony Horizon 18 Inch Bike is shown on a white background, featuring a purple lightweight alloy frame with black handlebars, seat, pedals, and tires.
A close-up of the Colony Horizon 18 Inch Bike shows its lightweight alloy frame, black handlebars with a brake lever, and the "Colony" logo on the handlebars.
Close-up of the Colony Horizon 18 Inch Bike’s handlebar stem with a black clamp, attached to a lightweight alloy frame featuring visible welds and a cable.
Close-up of the Colony Horizon 18 Inch Bike’s rear wheel, showcasing the brake caliper, tire tread, lightweight alloy frame, chain, and part of the gear assembly in detail.
Close-up of the Colony Horizon 18 Inch Bike’s front wheel, black fork, and part of its lightweight alloy frame against a white background.
Close-up of the Colony Horizon 18 Inch Bike’s rear wheel hub, highlighting metal spokes, chain, gears, axle nut, and part of its lightweight alloy frame.
Close-up of the Colony Horizon 18 Inch Bike crank arm and black pedal on the chainring, showing part of its lightweight alloy frame and rear wheel.
Close-up of a black textured bicycle seat with white stitching on an orange Colony Horizon 18 Inch Bike frame, isolated on a white background.
Close-up of the Colony Horizon 18 Inch Bike's rear wheel hub with black spokes, chain, and an orange frame—ideal for any aspiring freestyle Olympic athlete.
Close-up of a Colony Horizon 18 Inch Bike frame showing the head tube, top tube, down tube, cable routing, visible welds, and part of the headset—a BMX-inspired design for young freestyle riders.
Close-up of a black pedal and crank arm attached to an orange Colony Horizon 18 Inch Bike frame, with part of the chain and rear tire visible.
Close-up of the handlebars and front section of an orange Colony Horizon 18 Inch Bike featuring a visible Colony logo, ideal for BMX freestyle enthusiasts.
Close-up of the black handlebar and stem with the Colony logo on an orange Colony Horizon 18 Inch Bike, highlighting its lightweight alloy frame, front tire, and brake cable.
Close-up view of the Colony Horizon 18 Inch Bike’s rear wheel, chain, gear, and brake mechanism against a white background, featuring a lightweight alloy frame.
Colony Horizon 18 Inch Bike
Colony Horizon 18 Inch Bike, Pink Aqua Fade
Colony Horizon 18 Inch Bike, Pink Aqua Fade
Colony Horizon 18 Inch Bike, Pink Aqua Fade
Colony Horizon 18 Inch Bike, Pink Aqua Fade
Colony Horizon 18 Inch Bike, Pink Aqua Fade
Colony Horizon 18 Inch Bike, Pink Aqua Fade
Colony Horizon 18 Inch Bike, Pink Aqua Fade
Colony Horizon 18 Inch Bike, Pink Aqua Fade
Colony Horizon 18 Inch Bike, Pink Aqua Fade
Colony Horizon 18 Inch Bike, Pink Aqua Fade
Colony Horizon 18 Inch Bike, Clear Gold
Colony Horizon 18 Inch Bike, Clear Gold
Colony Horizon 18 Inch Bike, Clear Gold
Colony Horizon 18 Inch Bike, Clear Gold
Colony Horizon 18 Inch Bike, Clear Gold
Colony Horizon 18 Inch Bike, Clear Gold
Colony Horizon 18 Inch Bike, Clear Gold
Colony Horizon 18 Inch Bike, Clear Gold
Colony Horizon 18 Inch Bike, Clear Gold
Colony Horizon 18 Inch Bike, Clear Gold
Colony Horizon 18 Inch Bike, Clear Gold

Highlights

  • Lightweight 6061T6 alloy frame
  • Geometry that suits younger riders
  • Chromoly fork and bars
  • Sealed bearings front and rear

Description

Built around a lightweight 6061T6 alloy frame with appropriately sized geometry, the Colony Horizon 18 is made for younger, smaller riders starting out. Progression and having fun with BMX come naturally on it, across every style of riding.

The parts kit is proper BMX: a chromoly fork and chromoly bars, 3-piece tubular chromoly cranks on a sealed mid bottom bracket, sealed bearing hubs with a 9T cassette driver and a rear brake fitted. All up it weighs 9.4 kg.

Features
  • Lightweight 6061T6 alloy frame. The Colony Horizon 18 frame runs a 17.9" top tube and a 12.0" rear end, sized for smaller riders starting out in BMX.
  • Geometry that suits younger riders. A 75.0º head angle, 71º seat angle and a 48cm standover keep the bike easy to handle and easy to get on and off.
  • Chromoly fork and bars. Tapered CrMo fork legs and 8.0" rise, 25.5" wide chromoly bars put the strong stuff where the front end takes the hits.
  • Sealed bearings front and rear. Alloy hubs on 10mm axles with a full sealed bearing cassette and 9T driver out back, so the wheels keep rolling with less fuss.
  • Ready to ride at 9.4 kg. 140mm 3-piece tubular CrMo cranks, mid sealed bottom bracket, 25T sprocket and a 990 style rear brake with a short reach lever.

Specifications
  • Size: 18" wheels, 17.9" top tube
  • Frame: Colony Horizon 18" 6061T6 alloy, mid BB, 1-1/8" integrated headset
  • Top tube: 17.9"
  • Chainstay: 12.0" rear
  • Head tube angle: 75.0º
  • Seat tube angle: 71º
  • Standover: 48cm, ground to top tube
  • Bottom bracket height: 10.0 inches
  • Fork: Colony Horizon 18" CrMo with tapered legs
  • Headset: 1-1/8" integrated
  • Stem: Colony Horizon alloy top load, short reach
  • Bars: Colony Horizon CrMo, 8.0" rise, 25.5" wide
  • Grips: Colony Horizon
  • Brakes: Rear 990 style with clear pads, slick cable
  • Brake lever: Alloy short reach, right hand
  • Cranks: Colony Horizon tubular CrMo 3pce, 140mm
  • Bottom bracket: MID sealed bearing
  • Sprocket: Colony Horizon 25T
  • Chain: KMC
  • Pedals: Plastic
  • Front hub: Colony Horizon alloy, sealed bearing, 10mm axle
  • Rear hub: Colony Horizon alloy, full sealed bearing cassette, 10mm axle with 9T driver
  • Spokes: Black steel
  • Rims: Alloy single wall, 36 hole
  • Tyres: Family F2128 18" x 2.1" front and rear
  • Seat: Colony Horizon railed
  • Seat post: Alloy, 27.2mm diameter
  • Weight: 9.4 kg

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.

Colony Horizon 18 Inch Bike

Brand: Colony SKU:

New Colour
$699.99 AUD

Or 4 payments of $174.99 AUD with

Recommended Rider Height: 122 to 147 cm

Colour - Trans Gold

Top Tube Length - 17.9

18 inch BMX sizing

An 18 inch bike suits a rider of about 122 to 147cm, usually 7 to 11 years old, on an 18 to 18.5 inch top tube. It is the last step before a full size 20 inch.

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 your rider is near 147cm and still growing, look at a 20 inch instead: it is the size they will keep riding.

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.

  • Between an 18 and a 20? Take the 20. It is the size they will keep riding, and an 18 gets outgrown quickly.
  • They should be able to stand over the top tube with both feet flat on the ground.

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

Read the full buying guide

18 inch BMX sizing

An 18 inch bike suits a rider of about 122 to 147cm, usually 7 to 11 years old, on an 18 to 18.5 inch top tube. It is the last step before a full size 20 inch.

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 your rider is near 147cm and still growing, look at a 20 inch instead: it is the size they will keep riding.

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.

  • Between an 18 and a 20? Take the 20. It is the size they will keep riding, and an 18 gets outgrown quickly.
  • They should be able to stand over the top tube with both feet flat on the ground.

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

Read the full buying guide

Colony Horizon 18 Inch Bike - Trans Gold / 17.9

$699.99 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 $174.99, one every two weeks, with no late fees. How it works

Bike shipping from $29.99All rates

Free in-store pickup - Brisbane

Availability

17.9
Trans Gold
Trans Purple
Black Ano
Matte Translucent Teal
Clear Polished (Raw)
Clear Navy (Blue)
Clear Pink
Orange
Polished
Clear Black
Clear Purple
Pink Aqua Fade
Clear Gold

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

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