Defiant Series Mountain Bike Helmet

Defiant Series Mountain Bike Helmet



Note: Please refer to the size chart, where applicable.


Free Shipping on all Orders

100% Secure Shopping

30 day Return Policy

  • Description
  • Product Specification
  • Reviews (27)
  • Size


Our Defiant Series men’s mountain bike helmet designed for extreme MTB cyclists. This ultralightweight bicycle helmet is ergonomically built for comfort, rapid ventilation, and hands-on safety. The tough outer shell and internal EPS foam make Defiant Series helmets very secure against impacts, in addition to a visor to protect your eyes from rain, sun, mud, and trees. This awesome bike helmet is also shockproof, waterproof, and is insulated for thermal control.

A strong strap is included to hold the helmet in place when riding on dangerous terrain. Moreover, the retention system allows tightly fastening the helmet according to your head size. You can grab our resilient Defiant Series cycling helmet in six lively colors. The adjustable clip allows you to set the head size between 56 cm and 62 cm.


  • Polycarbonate exterior
  • Internally lined EPS foam
  • 13 vents for airflow
  • Insulated for thermal control
  • Shock-absorbent inner padding
  • Visor to protect eyes from rain, sun, tree branches, dust, and gravel
  • Waterproof and shockproof

Additional information

Package Weight 0.42 kg
Package Size 33 × 23 × 20 cm
Age Group

(Adults) Men




Ultralight Helmet

Weight (g)


Air Vents

8 – 15



27 reviews for Defiant Series Mountain Bike Helmet

  1. 5 out of 5

    Super fast delivery (like a week). Helmet looks and feels good. Good value buy. Thanks seller

  2. 5 out of 5

    helmet very good, arrived well before term and no no defect.

  3. 5 out of 5

    very good quality. VISOR Is Adjustable To power block sun Your taste. happy 🙂

  4. 5 out of 5

    Excellent helmet looks cool and it only took 7 days delivery to New Zealand absoulutley delighted. 5 stars Very happy indeed

  5. 5 out of 5

    visor mount front was broken, thank you returned seller amount of it, commutability for 5 star ставлю fast shipping

  6. 5 out of 5

    excellent HELMET like the picture, very comfortable

  7. 4 out of 5

    Pretty cool helmet the adjustment works great

  8. 5 out of 5

    recommend. pd: if i big headed adjusted very well.

  9. 4 out of 5

    I had asked for 2 blacks and one orange. and I got all orange … of rest everything is fine.

  10. 4 out of 5

    The product discription was accurate but as for the packing was not upto the mark, a cliping from the visor broke, probably during the transportation. Otherwise am happy with the product!

  11. 5 out of 5

    very fast, great shipping!

  12. 4 out of 5

    Good product. Just pay attention to measurements they are not accurate, I have a 60cm head and the helmet barely fits and I have the regulation at maximum. Hope I get used to it.

  13. 5 out of 5

    high quality nice fashion, arrived before time, VISOR came ruptured and they replaced for me, recommended shop

  14. 4 out of 5

    52 days for delivery for some reason, but in the end arrived perfect, seller was always available for tracking thanks

  15. 5 out of 5

    Its Great! Dont need a hat below the helmet anymore.

  16. 4 out of 5

    i think only one size available. looked too large in picture, fits perfect with adjustor

  17. 5 out of 5

    very good item great quality value price. very comfortable. It QUALITY set first level brands.

  18. 5 out of 5

    excellent product good quality… perfect-fitting head and still has the regulation… came with no harm… not went taxado msm the package being well bulky

  19. 4 out of 5

    Not fast but moderate shipping, Very nice seller. Excellent products, Very happy with the packaging and overall service.

  20. 5 out of 5

    amazing product, delivered very fast to spain thanks

  21. 4 out of 5

    good HELMET, But a bit large the free REGULATOR HEAD though adjusted good, fashionable item i like, comfortable and light.

  22. 5 out of 5

    thanks you are great the helmet is very good value for money.

  23. 5 out of 5

    very good Purchase excellent figment and i bought more than 10 seller recommended, HELMETS and gloves all very good

  24. 5 out of 5

    Nice my wife loves it thanks. Just like in the picture. Five stars ✨ ✨ to the seller

  25. 5 out of 5

    A good helmet, but it looks somewhat more massive than in the photo. Front visor comes off , why

  26. 5 out of 5

    Excellent product, very happy with the purchase. Fast shipping

  27. 5 out of 5

    reached Kiev 14 days after the order, the helmet is super, but snapping the visor will lead to its damage (the pin breaks down to the center). too big for girls, perfect for men

Add a review

This brilliant cycling helmet is designed for head sizes ranging between 56-62 cm, so it’s a Medium & Large fit only. Dimensions for the stylish bicycle helmet measure 33cm x 23cm x 20cm or 13in x 9.1in x 7.9in (L, H, W).