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Not sure what sized bike is best?

Answer a few short questions and we'll make a recommendation on which size is best for you.

Lazer Nutz 2.0 Kineticore Kids Helmet Green Dots UNI 50-56cm

Lazer

Lazer Nutz 2.0 Kineticore Kids Helmet Green Dots UNI 50-56cm

Regular price $75.00 Full price
Sale price $75.00
Club price
Regular price $79.99 Full price
Bell Helmet Local Matt Black

Bell

Bell Helmet Local Matt Black

Regular price $132.00 Full price
Sale price $132.00
Club price
Regular price $139.99 Full price
Size
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Bell Helmet Local Gloss White

Bell

Bell Helmet Local Gloss White

Regular price $132.00 Full price
Sale price $132.00
Club price
Regular price $139.99 Full price
Size
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Lazer Finch KinetiCore Youth MTB Trail Helmet UNI 50-56cm Matte Teal

Lazer

Lazer Finch KinetiCore Youth MTB Trail Helmet UNI 50-56cm Matte Teal

Regular price $116.00 Full price
Sale price $116.00
Club price
Regular price $129.99 Full price
Lazer PNut 2.0 Kineticore Toddler Helmet Flying Rockets UNI 46-52cm

Lazer

Lazer PNut 2.0 Kineticore Toddler Helmet Flying Rockets UNI 46-52cm

Regular price $75.00 Full price
Sale price $75.00
Club price
Regular price $79.99 Full price
Giro Aerohead MIPS II Road Aero Helmet Matte Black

Giro

Giro Aerohead MIPS II Road Aero Helmet Matte Black

Regular price $921.00 Full price
Sale price $921.00
Club price
Regular price $949.00 Full price
Size
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Giro Hoxton MIPS BMX Helmet Matte Black

Giro

Giro Hoxton MIPS BMX Helmet Matte Black

Regular price $193.00 Full price
Sale price $193.00
Club price
Regular price $198.99 Full price
Size
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Bern Helmet Hudson MIPS Satin White
MIPS

Bern

Bern Helmet Hudson MIPS Satin White

Regular price $237.00 Full price
Sale price $237.00
Club price
Regular price $249.99 Full price
Size
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Bell Spark 2 MIPS Helmet Matte White

Bell

Bell Spark 2 MIPS Helmet Matte White

Regular price $205.00 Full price
Sale price $205.00
Club price
Regular price $215.99 Full price
Size
Translation missing: en.products.product.variant_options
Bell Spark 2 MIPS Helmet Matte Black

Bell

Bell Spark 2 MIPS Helmet Matte Black

Regular price $205.00 Full price
Sale price $205.00
Club price
Regular price $215.99 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

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99 Bikes have a massive range of quality bike helmets for all ages, including men’s, women’s, kids bike helmets available in store and online! In New Zealand every cyclist is required to wear bike helmets by law. Beyond providing safety, your helmet should also be comfortable and suitable for the style of riding you’ll be doing. Shop the best range of road helmets, mountain bike helmets, full face helmets, BMX helmets, kids helmets, and more. You can be sure you're buying the best helmet at the best price with our Best Price Guarantee. Shop online with click & collect and delivery, and in store at your local 99 Bikes in Auckland, Christchurch & Wellington.