We have an awesome range of mountain bike helmets from all the best brands at New Zealand's best prices. Full face mountain bike helmets or downhill mountain bike helmets offer added protection to the front of the face while improving overall coverage of riders' heads. Convertible mountain bike helmets convert from half face helmets to full face helmets. You can be sure you're buying the best full face 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.