How KEP Helmet Sizing Works

Every KEP helmet consists of:

Outer shell

This is the structural outer part of the helmet. Each shell covers a range of liner sizes.

Inner liner

The liner sits inside the helmet and determines the exact fit. Liners are available in individual centimetre sizes, allowing for precise adjustment.

This system ensures a more accurate fit than traditional fixed-size helmets.

Step 1:

Measure Your Head

To determine your correct size, measure the circumference of your head using a soft measuring tape.

Measure around the widest part of your head, approximately 1 cm above your eyebrows and around the back of your head.

Keep the tape level and snug, but not tight.

Your measurement in centimetres corresponds directly to your liner size.

For example:

  • 51 cm head → size 51 liner
  • 56 cm head → size 56 liner
  • 59 cm head → size 59 liner

Step 2:

Choose the Correct Shell Size

KEP helmet shells cover the following liner size ranges:

  • Medium shell: liner sizes 51–58
  • Large shell: liner sizes 59–62

This ensures the helmet maintains correct proportions and structural integrity.

Step 3:

Choose the Correct Liner Shape

KEP liners are available in different shapes to suit different head profiles.

Standard liner

Suitable for most riders.

Oval liner

Designed for riders with a narrower or longer head shape.

Choosing the correct liner shape improves comfort and stability.