O'Neal Thunderball MTB Helmet

As low as £59.99

Can be purchased using Cycle to work

The lightweight O'Neal Thunderball MTB Helmet offers outstanding protection as well as easy adjustment and excellent comfort. The design of the EPS shell is inspired by the shell of motorbike helmets to allow for high stability and safety. The perfect choice for any athlete.
  • Design: instead of the thin Microshell, which is used in an inmold helmet that Thunderball has very stable "Exxo"
  • ABS outer shell, like a motorcycle helmet
  • The EPS liner, which takes over the shock absorption is accordingly made of the motorcycle EPS material with correspondingly higher safety reserves
  • Despite the helmet with 380gramm is comparatively easy
  • 2 shell sizes: XXS/S= 52-56 cm, M/XL= 57- 60 cm
  • With O`Neal standard: developed in germany Fidlock patented magnetic closure.
  • Sizing system with more comfortable hand adjustment

Specification Overview

More Information
Brand O'Neal
Type Mountain Bike Helmets
Gender Unisex
More Information
Eligible for cycle to work Eligible for cycle to work
Primary Colour Black
Size X Small/Small
Brand O'Neal
Type Mountain Bike Helmets
Gender Unisex
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Standard £2.99 or FREE on orders over £10
- Order by 3pm (Sun-Thurs) to be delivered within 3 working days
- Most bikes delivered within 5 working days.
- An estimated delivery window will be shown at the checkout.
Next Day £4.99
- Order by 3pm (Sun-Thurs) for Next Day delivery
Click and Collect FREE
- Order by 3pm (Sun-Thurs) to pick up in 2 working days
- Order by 3pm (Sun-Thurs) to pick up in 5 working days


To find out more about bike delivery, as well as our easy returns service, head over to our delivery and returns page.


All of the bikes we sell online are built and inspected by our qualified mechanics – just like when you buy a bike from one of our stores. All you’ll need to do when you receive the bike is straighten the handlebars and attach one of the pedals. This service is free, and included every time you buy a bike. Find out more.