About Bike Delivery

×

Timeline Icon - Bike Delivery

Timelines

Delivered ready to ride in 10 to 14 days.

Bike Icon - Bike Delivery

Place your order

Select the product you are interested in, click delivery, type in your postcode, and select Bike Delivery. If this is not available there is no available stock nearby.

Phone Icon - Bike Delivery

Order Confirmation

Once your order is placed we will be in contact with you within 2 hours to confirm your order.

Building a bike Icon - Bike Delivery

Bike Build

Your bike will be built up at your local 99 bikes by one of our expert mechanics and safety checked prior to delivery.

Bike Service Icon - Bike Delivery

Delivery

Your bike is delivered to your door by a 99 Bikes expert who will walk you through your new bike and answer any questions you may have.

Next Business Day Delivery

×

Timeline Icon - Bike Delivery

Timelines

Delivered before 8pm next business day.

Helmet Icon - Bike Delivery

Place your Order

All orders placed before midnight will be delivered next business day before 8pm.

Truck Icon - Bike Delivery

Picked for Delivery

Your local 99 Bikes store will prepare your order ready for dispatch.

Delivery Icon - Bike Delivery

Delivery

One of our friendly 99 Delivery team members will deliver your order.

Shipping & Delivery Options

×

At 99 Bikes, we offer multiple delivery options to suit your needs. Here’s a quick overview:

Click & Collect:
Order online and pick up your item from a nearby store — free and often same-day!

Standard Delivery:
Available for most parts and accessories.
Estimated delivery:

  • Metro: 2–14 business days
  • Regional & Remote: Up to 21 business days

Express Delivery:
Available for most parts and accessories.
Estimated delivery:

  • Metro: 1–6 business days
  • Regional & Remote: Up to 21 business days

Boxed Bike Delivery:
For selected bikes. Delivered boxed to your address and ready to be assembled in 1 - 2 weeks.

Note: Delivery times are an estimate and actual delivery times may vary based on public holidays and peak periods. Bulky items may take longer.
For full details, delivery estimates and more information, please visit our Shipping & Delivery Info page.

Your store:
Click & Collect:
Deliver to:

DK Helio 21 Inch TT BMX Bike Black Crackle (2021)

Out of stock
Request a Price Beat

Up to 12 months interest free

Features

Perfect Ride Guarantee
If you don't love it, you can swap it, up to 30 days from purchase!* Learn more »

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

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

Please note that, in order to reduce production and delivery times, bike specifications are subject to change by the manufacturer without notice. Please be aware that these changes might not be reflected on product pages and images.

The DK Helio gives you everything you need to flip it and rip it in the park, the street or on the dirt. Bringing back what makes the Helio a great freestyle bike, it's back in 2021 with full chromoly fork, frame, bars and 3 piece cranks. A 21" top tube is suitable for a range of riders, with plenty of room for you to do your work. It even has an aftermarket DK Stealth seat/post, DUO Pedals and DUO 2.35" Stun1 Tyres for a ferocious ride. On a bike of this quality you get fully sealed bearings throughout and 26/9 gearing. DK designed the Helio to be a versatile BMX which is comfortable on every surface and ready to shred at a moments notice.

Features

  • 100% chromoly frame with removable brake mounts
  • 100% chromoly fork w/ built-in bearing race, internally threaded pre-load bolt, tapered legs
  • 8.8” rise - 100% chromoly handlebar
  • Sealed hubs
  • DUO Brand 2.35” Stun 1 Tyres, 65psi.
More Information
SKU DKXB21CB2410A
Season 2021
Size 20inch
Click & Collect Yes
Frame 100% chromoly w/ removable brake mounts
Frame Material Chromoly
Fork 100% chromoly w/ built-in bearing race, internally threaded pre-load bolt, tapered legs
Fork Material Chromoly
Front Gears Single
Rear Gears Single Speed
Crankset Wise tubular chromoly 3-piece, 170mm
Pedals DUO Brand Resilite platform
Chain KMC Z-510, silver
Brake Type Rim Brake
Brakes WISE alloy U-brake
Brake Levers Wise alloy, hinged
Cassette DK 26T, alloy
Wheel Size 20"
Tyres 2.35” DUO Brand Stun1, 65psi
Rims Wise Rectrix2, double wall, 36mm wide, 36-hole
Hubs Wise alloy, fully sealed, 14mm axle, 9T driver
Spokes 14G, black
Bottom Bracket 19mm sealed Mid
Handlebar 8.8” rise, 100% chromoly
Grips DK Tsuka w/ press-in bar plugs
Saddle DK Stealth Pivotal
Seatpost 25.4mm Stealth Pivotal, alloy

20" Freestyle BMX Sizing Chart

Rider's Height (cm)
140
145
150
155
160
165
170
175
180
185
190
195
19.5-20"
Top Tube
20-20.5"
Top Tube
20.5-21"
Top Tube
21+"
Top Tube

BMX Bike Geometry Diagram

Legend

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

Size

20inch
Wheel Size 20"
Frame Size 20
TT Top Tube (mm) 21.0
HTA Head Tube Angle (°) -
HT Head Tube (mm) -
S Stack (mm) -

Improve Product Information