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Met

Met Miles Replacment Helmet Pads

Regular price $23.00 Full price
Sale price $23.00
Club price
Regular price $24.95 Full price
Bell Z20 MIPS Road Helmet Helmet Matte/Gloss Grey/Crimson
59% Off Full Price

Bell

Bell Z20 MIPS Road Helmet Helmet Matte/Gloss Grey/Crimson

Regular price $134.00 Full price
Sale price $134.00
Club price
Regular price $329.99 Full price
Size
Translation missing: en.products.product.variant_options

Lazer

Lazer Vento KinetiCore Road Helmet Matte White (SM 52-56cm)

Regular price $400.00 Full price
Sale price $400.00
Club price
Regular price $439.95 Full price
100% Aircraft Visor Screw Kit Black
34% Off Full Price

100%

100% Aircraft Visor Screw Kit Black

Regular price $18.00 Full price
Sale price $18.00
Club price
Regular price $27.45 Full price
MET Bluegrass Rogue MIPS MTB Helmet Metallic Red
48% Off Full Price

Met

MET Bluegrass Rogue MIPS MTB Helmet Metallic Red

Regular price $145.00 Full price
Sale price $145.00
Club price
Regular price $279.99 Full price
Size
Translation missing: en.products.product.variant_options

Lazer

Lazer Nutz Helmet Replacement Padding - One Size

Regular price $11.00 Full price
Sale price $11.00
Club price
Regular price $11.99 Full price
TLD A3 AS UNO Helmet MIPS Slate Blue
39% Off Full Price

TLD

TLD A3 AS UNO Helmet MIPS Slate Blue

Regular price $199.00 Full price
Sale price $199.00
Club price
Regular price $329.95 Full price
Size
Translation missing: en.products.product.variant_options

Lazer

Lazer Jackal KC Helmet Matt Black

Regular price $289.00 Full price
Sale price $289.00
Club price
Regular price $329.95 Full price
Size
Translation missing: en.products.product.variant_options
Lazer Sphere MIPS Road Helmet Matte Titanium (Small)
15% Off Full Price

Lazer

Lazer Sphere MIPS Road Helmet Matte Titanium (Small)

Regular price $185.00 Full price
Sale price $185.00
Club price
Regular price $220.00 Full price
Fox Speedframe MIPS MTB Helmet Camo/Black 2025
20% Off Full Price

FOX

Fox Speedframe MIPS MTB Helmet Camo/Black 2025

Regular price $159.00 Full price
Sale price $159.00
Club price
Regular price $199.99 Full price
Size
Translation missing: en.products.product.variant_options
Fox Speedframe 5050 MIPS MTB Helmet Black/White 2025
MIPS

FOX

Fox Speedframe 5050 MIPS MTB Helmet Black/White 2025

Regular price $179.00 Full price
Sale price $179.00
Club price
Regular price $199.99 Full price
Size
Translation missing: en.products.product.variant_options
Fox Speedframe Solid MIPS MTB Helmet Twilight Blue 2025
MIPS

FOX

Fox Speedframe Solid MIPS MTB Helmet Twilight Blue 2025

Regular price $179.00 Full price
Sale price $179.00
Club price
Regular price $199.99 Full price
Size
Translation missing: en.products.product.variant_options

Lazer

Lazer Chiru Helmet Matte Blue Steel

Regular price $79.00 Full price
Sale price $79.00
Club price
Regular price $89.99 Full price
Size
Translation missing: en.products.product.variant_options
Giro Scamp II Kids Helmet Pink
New

Giro

Giro Scamp II Kids Helmet Pink

Regular price $79.00 Full price
Sale price $79.00
Club price
Regular price $89.99 Full price
Size
Translation missing: en.products.product.variant_options
Met Hooray MIPS Kids Helmet Space Glow in the Dark
MIPS

Met

Met Hooray MIPS Kids Helmet Space Glow in the Dark

Regular price $119.00 Full price
Sale price $119.00
Club price
Regular price $134.95 Full price
Size
Translation missing: en.products.product.variant_options
Fox Speedframe Pro Backfade MIPS MTB Helmet Black 2025
MIPS

FOX

Fox Speedframe Pro Backfade MIPS MTB Helmet Black 2025

Regular price $278.00 Full price
Sale price $278.00
Club price
Regular price $299.99 Full price
Size
Translation missing: en.products.product.variant_options

Raven

Raven BMX Helmet Satin Teal

Regular price $45.00 Full price
Sale price $45.00
Club price
Regular price $49.99 Full price
Size
Translation missing: en.products.product.variant_options

Lazer

Lazer Finch Kineticore MTB Helmet Bright Pink

Regular price $94.00 Full price
Sale price $94.00
Club price
Regular price $99.95 Full price

Met

Met Hooray Kids Helmet Blue/Dogs

Regular price $75.00 Full price
Sale price $75.00
Club price
Regular price $84.95 Full price
Size
Translation missing: en.products.product.variant_options
MET Rivale MIPS Road Helmet Absolute White Limited Edition
15% Off Full Price

Met

MET Rivale MIPS Road Helmet Absolute White Limited Edition

Regular price $229.00 Full price
Sale price $229.00
Club price
Regular price $269.95 Full price
Size
Translation missing: en.products.product.variant_options
(Large) Smart Urban L60 Helmet Black
New

Smart4U

(Large) Smart Urban L60 Helmet Black

Regular price $119.00 Full price
Sale price $119.00
Club price
Regular price $129.00 Full price

Lazer

Lazer Finch Kineticore MTB Helmet Navy/Black

Regular price $94.00 Full price
Sale price $94.00
Club price
Regular price $99.95 Full price
Giro Scamp II Kids Helmet Blue/Green Towers
New

Giro

Giro Scamp II Kids Helmet Blue/Green Towers

Regular price $79.00 Full price
Sale price $79.00
Club price
Regular price $89.99 Full price
Size
Translation missing: en.products.product.variant_options
MET Trenta MIPS Road Helmet Absolute White Limited Edition
MIPS Coming Soon

Met

MET Trenta MIPS Road Helmet Absolute White Limited Edition

Regular price $380.00 Full price
Sale price $380.00
Club price
Regular price $399.95 Full price
Size
Translation missing: en.products.product.variant_options

Lazer

Lazer Finch Kineticore MTB Helmet Fluoro Green

Regular price $94.00 Full price
Sale price $94.00
Club price
Regular price $99.95 Full price
MET Trenta 3K Carbon MIPS Road Helmet Glossy White
New Coming SoonComing Soon

Met

MET Trenta 3K Carbon MIPS Road Helmet Glossy White

Regular price $569.00 Full price
Sale price $569.00
Club price
Regular price $579.95 Full price
Size
Translation missing: en.products.product.variant_options
Fox Rampage Youth Fullface MIPS MTB Helmet Camo/Black
MIPS

FOX

Fox Rampage Youth Fullface MIPS MTB Helmet Camo/Black

Regular price $315.00 Full price
Sale price $315.00
Club price
Regular price $349.99 Full price
Size
Translation missing: en.products.product.variant_options

Raven

Raven Corvus MTB Helmet with Magnetic Clip Satin Black

Regular price $64.00 Full price
Sale price $64.00
Club price
Regular price $69.00 Full price
Size
Translation missing: en.products.product.variant_options
(Medium) Smart Urban L60 Helmet Black
New

Smart4U

(Medium) Smart Urban L60 Helmet Black

Regular price $119.00 Full price
Sale price $119.00
Club price
Regular price $129.00 Full price
Cinettica Roar Dinosaur Kids Helmet Green
19% Off Full Price Coming SoonComing Soon

Cinettica

Cinettica Roar Dinosaur Kids Helmet Green

Regular price $48.00 Full price
Sale price $48.00
Club price
Regular price $59.99 Full price
Size
Translation missing: en.products.product.variant_options
Cinettica Roar Shark Kids Helmet
19% Off Full Price Coming SoonComing Soon

Cinettica

Cinettica Roar Shark Kids Helmet

Regular price $48.00 Full price
Sale price $48.00
Club price
Regular price $59.99 Full price
Size
Translation missing: en.products.product.variant_options

Giro

Giro Agilis MIPS Road Helmet Matte White 2025

Regular price $169.00 Full price
Sale price $169.00
Club price
Regular price $179.99 Full price
Size
Translation missing: en.products.product.variant_options

Lazer

Lazer Lupo Kineticore MTB Helmet Matte Black UNI 55-61cm

Regular price $94.00 Full price
Sale price $94.00
Club price
Regular price $99.95 Full price

Lazer

Lazer Finch Kineticore MTB Helmet Teal

Regular price $94.00 Full price
Sale price $94.00
Club price
Regular price $99.95 Full price
Giro Scamp II Kids Helmet Black/Red 2025
New

Giro

Giro Scamp II Kids Helmet Black/Red 2025

Regular price $79.00 Full price
Sale price $79.00
Club price
Regular price $89.99 Full price
Size
Translation missing: en.products.product.variant_options

Raven

Raven Corvus MTB Helmet with Magnetic Clip Satin Blue

Regular price $64.00 Full price
Sale price $64.00
Club price
Regular price $69.00 Full price
Size
Translation missing: en.products.product.variant_options

Find Your Size

Step 1: Measure your height

  • Take off your shoes
  • Stand with your back straight against a wall
  • Balance a book on your head to mark your height on the wall
  • Measure your height by the distance from the floor to the mark
cm

Find Your Size

Step 2: Adjust your inseam

  • Based on your height, we’ve calculated a starting point.
  • You can measure your inseam by tucking a book between your legs so there is pressure but it isn’t uncomfortable.
  • Inseam typically falls with 5cm of the average.
cm

Find Your Size

Your results

For the we suggest the following size.

More comfort More speed
Height: --
Inseam: --
Adjusted Height: --

Find Your Size

We have saved your measurements.

Recommended sizes will now be highlighted on the page.

Huge Range of Bike Helmets

Beyond providing safety, your helmet should also be comfortable and suitable for the style of riding you'll be doing. At 99 Bikes, we carry a huge range of helmets from the best brands.

Popular Types of Helmets

Kids Helmets

BMX & Skate Helmets

Mountain Bike Helmets

Full Face Bike Helmets

Road Bike Helmets

Recreational Helmets

Helmets Under $200

Kids Helmets

When buying a kids bike helmet parents need to consider two factors - firstly, safety and secondly, picking a design that your kids will love to wear. 99 Bikes range includes; baby helmets, toddler bike helmets, kids helmets, and youth helmets.

Mountain Bike Helmets

Otherwise known as MTB helmets, these generally feature a front visor for extra sun protection and extra protection around the rear of the helmet for additional impact protection on those rougher trails.

BMX Helmets

Otherwise known as street bike helmets, these deliver both safety for stacks at the skatepark and style to make that landing look so much sweeter, with BMX and skate helmets being designed for safety, style and comfort.

Road Helmets

If you’re donning the lycra and hitting the bitumen, look for road cycling helmets that are lightweight and have plenty of air vents to promote airflow around your head and keep you nice and cool on longer rides. Or, for the competitive rider our range of aero bike helmets are great in helping to reduce wind drag.

Full Face Helmets

Full face bike helmets provide the ultimate protection if you’re going to be doing any form of downhill mountain biking amongst unforgiving obstacles, they offer safety towards the front of the helmet and added top and back making them more expensive than traditional mountain bike helmets.

Bike Helmets Buying Guide

By law, every cyclist is required to wear a helmet which complies with Australia's strict safety standards. As well as being safe, your helmet also needs to be comfortable and suited to the type of riding you'll be doing. Read our buying guide ot understand the main types of helmets and how to pick which model is right for you.

Frequently asked questions

Our staff are well-known for being the most friendly, knowledgeable and professional bike experts, and will help you with any questions you may have. Here are some of the most common:

What size helmet should I buy?

A well-fitting helmet should be snug but not uncomfortable. To determine what size you’ll need, simply measure the circumference of your head using a piece of string placed about 3 cm above your eyebrows. As a guide, you can start with the below for the Azur L61, one of our most popular helmets:

Always check the sizing for an individual helmet under the Details tab on our pages, or check with one of our bike experts.

What is MIPS?

Multi-directional Impact Protection System (MIPS) is designed to reduce rotational motion that occur due to certain types of impacts. By allowing the head to move inside the helmet, the amount of harmful rotational motion is reduced. You can spot a MIPS helmet by the yellow liner beneath the pads when you look inside in the helmet.

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