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Bluegrass Rogue MIPS Helmet Titanium Tie-Dye
49% Off Full Price Clearance

Bluegrass

Bluegrass Rogue MIPS Helmet Titanium Tie-Dye

Regular price $115.00 Full price
Sale price $115.00
Club price
Regular price $229.95 Full price
Size
Translation missing: en.products.product.variant_options
Giro Tremor MIPS Kids Helmet UNI 47-54cm Blue Trench
MIPS

Giro

Giro Tremor MIPS Kids Helmet UNI 47-54cm Blue Trench

Regular price $94.00 Full price
Sale price $94.00
Club price
Regular price $99.95 Full price
Fox Speedframe MIPS MTB Helmet Military 2025
MIPS

FOX

Fox Speedframe MIPS MTB Helmet Military 2025

Regular price $184.00 Full price
Sale price $184.00
Club price
Regular price $199.99 Full price
Size
Translation missing: en.products.product.variant_options
Bluegrass Superbold BMX Helmet Matte Orange

Bluegrass

Bluegrass Superbold BMX Helmet Matte Orange

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 Corvus MTB Helmet with Magnetic Clip Satin Blue

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
MET Rivale MIPS Road Helmet Absolute White Limited Edition
15% Off Full Price MIPS

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
Lazer Finch Kineticore MTB Helmet Bright Pink

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
FOX Mainframe MIPS Helmet Fluoro Yellow 2024
32% Off Full Price Clearance MIPS

FOX

FOX Mainframe MIPS Helmet Fluoro Yellow 2024

Regular price $95.00 Full price
Sale price $95.00
Club price
Regular price $139.99 Full price
Size
Translation missing: en.products.product.variant_options
Raven Corvus MTB Helmet with Magnetic Clip Satin Grey

Raven

Raven Corvus MTB Helmet with Magnetic Clip Satin Grey

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
FOX Proframe Clyzo AS MTB Helmet Atomic Orange 2024
49% Off Full Price Clearance

FOX

FOX Proframe Clyzo AS MTB Helmet Atomic Orange 2024

Regular price $226.00 Full price
Sale price $226.00
Club price
Regular price $449.99 Full price
Size
Translation missing: en.products.product.variant_options
Lazer Lupo Kineticore Helmet Matte Black

Lazer

Lazer Lupo Kineticore Helmet Matte Black

Regular price $94.00 Full price
Sale price $94.00
Club price
Regular price $99.95 Full price
Bell 4Forty MIPS Air MTB Helmet Black/Camo
67% Off Full Price Clearance

Bell

Bell 4Forty MIPS Air MTB Helmet Black/Camo

Regular price $81.00 Full price
Sale price $81.00
Club price
Regular price $249.99 Full price
Size
Translation missing: en.products.product.variant_options
Fox Speedframe AS MTB Helmet White 2024
20% Off Full Price Clearance

FOX

Fox Speedframe AS MTB Helmet White 2024

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 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
Giro Syntax MIPS Helmet Matt/Black
38% Off Full Price Clearance

Giro

Giro Syntax MIPS Helmet Matt/Black

Regular price $135.00 Full price
Sale price $135.00
Club price
Regular price $219.99 Full price
Size
Translation missing: en.products.product.variant_options
Giro Isode II MIPS Road Helmet Yellow UNI 2025
MIPS

Giro

Giro Isode II MIPS Road Helmet Yellow UNI 2025

Regular price $120.00 Full price
Sale price $120.00
Club price
Regular price $139.99 Full price
Giro Agilis MIPS Road Helmet Matte Black 2025
MIPS

Giro

Giro Agilis MIPS Road Helmet Matte Black 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 Lupo Kineticore MTB Helmet UNI Blue

Lazer

Lazer Lupo Kineticore MTB Helmet UNI Blue

Regular price $94.00 Full price
Sale price $94.00
Club price
Regular price $99.95 Full price
Lazer CityZen KinetiCore Commuter Helmet White
44% Off Full Price Clearance

Lazer

Lazer CityZen KinetiCore Commuter Helmet White

Regular price $50.00 Full price
Sale price $50.00
Club price
Regular price $89.99 Full price
Size
Translation missing: en.products.product.variant_options
Met Rivale II MIPS Road Helmet Navy Silver
15% Off Full Price MIPS

Met

Met Rivale II MIPS Road Helmet Navy Silver

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
Giro Montaro III MIPS MTB Helmet Matte Black 2025
MIPS

Giro

Giro Montaro III MIPS MTB Helmet Matte Black 2025

Regular price $280.00 Full price
Sale price $280.00
Club price
Regular price $299.99 Full price
Size
Translation missing: en.products.product.variant_options
Giro Quarter Helmet Matte Black
34% Off Full Price Clearance

Giro

Giro Quarter Helmet Matte Black

Regular price $52.00 Full price
Sale price $52.00
Club price
Regular price $79.99 Full price
Size
Translation missing: en.products.product.variant_options
MET Echo Helmet Olive
31% Off Full Price Clearance

Met

MET Echo Helmet Olive

Regular price $68.00 Full price
Sale price $68.00
Club price
Regular price $99.95 Full price
Size
Translation missing: en.products.product.variant_options
Fox Speedframe Pro Backfade MIPS MTB Helmet Lilac
27% Off Full Price Clearance MIPS

FOX

Fox Speedframe Pro Backfade MIPS MTB Helmet Lilac

Regular price $240.00 Full price
Sale price $240.00
Club price
Regular price $329.99 Full price
Size
Translation missing: en.products.product.variant_options
Met Crossover Helmet Blue Metallic with LIGHT

Met

Met Crossover Helmet Blue Metallic with LIGHT

Regular price $89.00 Full price
Sale price $89.00
Club price
Regular price $99.95 Full price
Size
Translation missing: en.products.product.variant_options
Bluegrass Super Bold Helmet Matt Black
45% Off Full Price Clearance

Bluegrass

Bluegrass Super Bold Helmet Matt Black

Regular price $49.00 Full price
Sale price $49.00
Club price
Regular price $89.95 Full price
Size
Translation missing: en.products.product.variant_options
100% Altec Helmet Black
80% Off Full Price Clearance

100%

100% Altec Helmet Black

Regular price $53.00 Full price
Sale price $53.00
Club price
Regular price $269.99 Full price
Size
Translation missing: en.products.product.variant_options
Giro Aether Spherical Helmet Small Red/Dark Red
55% Off Full Price Clearance

Giro

Giro Aether Spherical Helmet Small Red/Dark Red

Regular price $222.00 Full price
Sale price $222.00
Club price
Regular price $499.99 Full price
Bell Z20 Mips Helmet Mat Orange/Black Ghost
68% Off Full Price Clearance

Bell

Bell Z20 Mips Helmet Mat Orange/Black Ghost

Regular price $117.00 Full price
Sale price $117.00
Club price
Regular price $369.95 Full price
Size
Translation missing: en.products.product.variant_options
Bluegrass Vanguard Core MIPS Fullface Helmet Matte/Gloss Black
MIPS

Bluegrass

Bluegrass Vanguard Core MIPS Fullface Helmet Matte/Gloss Black

Regular price $465.00 Full price
Sale price $465.00
Club price
Regular price $489.95 Full price
Size
Translation missing: en.products.product.variant_options
Bell Z20 MIPS Road Helmet Squid Black/Grey
68% Off Full Price Clearance

Bell

Bell Z20 MIPS Road Helmet Squid Black/Grey

Regular price $117.00 Full price
Sale price $117.00
Club price
Regular price $369.95 Full price
Size
Translation missing: en.products.product.variant_options
Giro Elixir Helmet Matte Grey

Giro

Giro Elixir Helmet Matte Grey

Regular price $85.00 Full price
Sale price $85.00
Club price
Regular price $89.99 Full price
Bell 4Forty MIPS Air MTB Helmet Black
67% Off Full Price Clearance

Bell

Bell 4Forty MIPS Air MTB Helmet Black

Regular price $81.00 Full price
Sale price $81.00
Club price
Regular price $249.99 Full price
Size
Translation missing: en.products.product.variant_options
Bluegrass Super Bold Helmet Grey/Cyan
42% Off Full Price Clearance

Bluegrass

Bluegrass Super Bold Helmet Grey/Cyan

Regular price $52.00 Full price
Sale price $52.00
Club price
Regular price $89.99 Full price
Size
Translation missing: en.products.product.variant_options
FOX Speedframe Pro Helmet Lunar Black 2023
26% Off Full Price Clearance

FOX

FOX Speedframe Pro Helmet Lunar Black 2023

Regular price $199.00 Full price
Sale price $199.00
Club price
Regular price $269.99 Full price
Size
Translation missing: en.products.product.variant_options
Lazer Cage Kineticore Fullface Helmet Matte Black
67% Off Full Price Clearance

Lazer

Lazer Cage Kineticore Fullface Helmet Matte Black

Regular price $147.00 Full price
Sale price $147.00
Club price
Regular price $449.95 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.

Most Popular Brands