The DK Swift Micro 18 Inch Bike 2025 is a black BMX-style bicycle with a lightweight aluminum frame, horizontal top tube, slim tires, straight handlebars, and yellow and white accents, shown in profile view.

Highlights

  • Race geometry in an 18 inch
  • Lightweight 6061 aluminium frame
  • 120mm forged alloy 3-piece cranks
  • Alloy rims and Vee tyres

Description

Ready to ride. The DK Swift bikes are an affordable first step to a life of BMX. The Swift series is sized to fit every rider in your crew, from the 18” Micro for the youngins to the Pro 20" for full-sized humans. Each Swift bike is built on a lightweight aluminum frame with race-proven geometry, sized by model with proportionate handlebars, cranks, and gearing. The Swift Pro features a sturdy chromoly 3-piece crank, while other sizes have a 3-piece alloy crank, sized accordingly. Alloy rims fitted with all-terrain tires put these bikes into motion and provide a smooth ride on any surface. All told, the Swift Series bikes are easy to ride, ready to race, and delivered at an unbeatable price.

Features
  • Race geometry in an 18 inch. A 16.25" top tube, 11.9" chainstay, 72º head angle and 70º seat angle: real race numbers scaled down for a small rider.
  • Lightweight 6061 aluminium frame. An integrated head tube and a threadless 1" chromoly fork steerer keep the front end light and simple to look after.
  • 120mm forged alloy 3-piece cranks. Short cranks on a BSA European bottom bracket give young legs a circle they can actually spin, geared 36 into 16.
  • Alloy rims and Vee tyres. 36 hole alloy rims with 18 x 1" Vee Speedster tyres keep the bike rolling easily on any surface.
  • Ready to ride at 7.4 kg. An alloy mini linear V-brake with a short reach lever, DUO Brand Mini grips and a DK Mini one piece seat and post combo.

Specifications
  • Size: 18"
  • Frame: 6061 aluminium with integrated head tube
  • Top tube: 16.25"
  • Chainstay: 11.9"
  • Head tube angle: 72º
  • Seat tube angle: 70º
  • Fork: Threadless 1" chromoly steerer with tapered legs
  • Headset: 1" integrated IS 36/45
  • Stem: Alloy front load, 30mm reach
  • Bars: 2" rise, 0° up sweep, 10° back sweep
  • Grips: DUO Brand Mini
  • Brakes: Alloy mini linear V-brake
  • Brake lever: Alloy short reach
  • Cranks: Forged alloy 3-piece, 120mm
  • Bottom bracket: BSA European 113
  • Sprocket: 36-tooth, alloy, 5-bolt chainring
  • Chain: Taya 1/2 x 1/8"
  • Pedals: Junior PC platform
  • Front hub: Alloy, 3/8" chromoly axle
  • Rear hub: Alloy, 3/8" chromoly axle
  • Rear cog: 16-tooth freewheel
  • Rims: Alloy, 36-hole
  • Tyres: 18 x 1" Vee Speedster
  • Seat: DK Mini 1-piece seat and post combo
  • Seat post: Integrated, 22.2mm, alloy
  • Seat clamp: Alloy
  • Gearing: 36/16
  • Weight: 7.4 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.

DK Swift Micro 18 Inch Bike 2025

Brand: DK Bicycles SKU:

$520.00 USD

Or 4 payments of $130.00 USD with

Colour - Black

Top Tube Length - 16.25

BMX race bike sizing

Race frames are sized by class, and the class you ride is set by rider height rather than age.

SizeRider heightTop tube
Micro (18" wheels)Under 120cm16.25"
Mini (20" wheels)110 to 140cm17 to 18"
Junior120 to 150cm18.25 to 18.75"
Expert130 to 170cm19.5 to 19.75"
Expert XL145 to 170cm20 to 20.75"
Pro150 to 175cm20.25 to 20.75"
Pro XL165 to 180cm21 to 21.25"
Pro XXL170 to 185cm and up21.5 to 21.85"
Pro XXXL175cm and up22"
Pro XXXXL180cm and up22.5"
Cruiser (24" wheels)175cm and up21.5" and up

Heights overlap between classes on purpose. Where you land in two, a growing rider is usually better on the larger, and a rider who wants the bike to turn faster on the smaller. Some brands label the Pro size Pro L, with the same fit.

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 two sizes and still growing? Take the larger size.
  • Racing gates and wanting the bike to turn faster? Take the smaller size.
  • Top tube is the number that actually changes the fit, so compare it against the bike they ride now.

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

Read the full buying guide

BMX race bike sizing

Race frames are sized by class, and the class you ride is set by rider height rather than age.

SizeRider heightTop tube
Micro (18" wheels)Under 120cm16.25"
Mini (20" wheels)110 to 140cm17 to 18"
Junior120 to 150cm18.25 to 18.75"
Expert130 to 170cm19.5 to 19.75"
Expert XL145 to 170cm20 to 20.75"
Pro150 to 175cm20.25 to 20.75"
Pro XL165 to 180cm21 to 21.25"
Pro XXL170 to 185cm and up21.5 to 21.85"
Pro XXXL175cm and up22"
Pro XXXXL180cm and up22.5"
Cruiser (24" wheels)175cm and up21.5" and up

Heights overlap between classes on purpose. Where you land in two, a growing rider is usually better on the larger, and a rider who wants the bike to turn faster on the smaller. Some brands label the Pro size Pro L, with the same fit.

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 two sizes and still growing? Take the larger size.
  • Racing gates and wanting the bike to turn faster? Take the smaller size.
  • Top tube is the number that actually changes the fit, so compare it against the bike they ride now.

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

Read the full buying guide

DK Swift Micro 18 Inch Bike 2025 - Black / 16.25

$520.00 USD

Price match request

Metro bike shipping from $39.99

Regional and remote rates may differ

Free in-store pickup - Brisbane

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