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DK Aura 18 Inch BMX Bike Black (2021)

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Free Bike Build

Free Bike Build
We'll build your bike for free when you click and collect at any 99 Bikes store.

First Free Service

First Free Tune-up
Every bike come with a complimentary free tune-up and safety check.

Please note, due to challenges in the product supply chain, bike specifications are subject to change without notice. Specifications listed below may not match exactly as shown in the photo.

The DK Aura 18 BMX bike is built for the kids that aren't quite big enough to step up to the full size 20 inch model. This bike has every optimised for the 18" ride so that you can get the most out of every ride. Glow in the dark graphics are new in 2021 for added style to go with the progressive freestyle geometry. This bike is super tough with a Hi-Ten Steel fork and frame that gives you confidence your bike will last. The wise tubular chromoly 3-piece cranks are built to perform in combination with the lighter alloy single wall rims. Whether its your first bike or just your next bike, the Aura 18 is a great bike for the smaller riders out there.


  • Hi-ten steel Frame
  • Hi-ten steel Fork w/ chromoly steerer tube, built-in bearing race, tapered legs
  • Wise tubular chromoly 3-piece cranks, 140mm, 8-spline spindle
  • Alloy single wall rims, 36-hole.
More Information
Season 2021
Size 18inch
Click & Collect Yes
Wheel Size 18"
Frame Material Steel
Fork Material Chromoly
Cassette Type Single Speed
Chainset Type Single
Brake Type U-Brake
Bottom Bracket 19mm sealed Mid
Brakes Wise alloy U-brake
Brake Levers Wise alloy
Cassette DK 25T, steel
Chain KMC Z-510, silver
Crankset Wise tubular chromoly 3-piece, 140mm
Fork Hi-ten steel w/ chromoly steerer tube, built-in bearing race, tapered legs
Frame Hi-ten steel
Grips DK Tsuka w/ press-in bar plugs
Handlebar 7.5” rise, hi-ten steel
Hubs Alloy, semi-sealed, oversized axle, 9T driver
Pedals DK Blender PC platform
Rims Alloy, single wall, 36-hole
Saddle 1-piece padded seat/post combo
Seatpost 25.4mm, alloy
Spokes 14G, black
Tyres 2.125” Innova street, 65psi
Kids Bike Sizing 18 Inch
Top Tube Length 18
Top Tube Length 18.x"

Youth Freestyle BMX Bike Sizing Chart

Rider's Height (cm)
Boys & Girls frame sizes
12" Wheel
14" Wheel
16" Wheel
18" Wheel

BMX Bike Geometry Diagram


ST Seat Tube

TT Top Tube

CS Chain Stay Length

HTA Head Tube Angle

STA Seat Tube Angle

BD Bottom bracket Drop

HT Head Tube

FL Fork Length

R Reach

S Stack

WB Wheel Base


Wheel Size 18"
Frame Size 18
TT Top Tube (in) 18.0
HTA Head Tube Angle (°) -
HT Head Tube (mm) -
S Stack (mm) -


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