Choose an S1 e-bike or bike helmet by fit first, then confirm the model details.

This range is for riders looking at S1 helmet options for e-bike and everyday bike riding. Start with the head measurement and product shape; then read the individual product page for that helmet’s stated certification, sizing, and intended use.

Find your size View all helmets

How to choose

Three checks before you buy.

1. Measure the head

Use the S1 size guide to choose the correct Mini Lifer, standard Lifer, or Mega Lifer shell range before deciding on colour or graphic.

2. Check the product page

Read the model description for the exact certification information, rider use, available sizes, and features. Certification is model-specific.

3. Fine-tune the fit

Once the shell range is right, sizing liners can help create a snug, stable fit that sits level on the head.

Current e-bike option

Compare the Retro Lifer E-Helmet.

If the retro profile suits the rider, open the product page to check its current size availability, full product description, and stated certification information before adding it to the cart.

View Retro Lifer E-Helmet Ask a fit question