Best Mountain Bike Helmets of 2021: Complete Reviews with Comparison

Mountain biking is adventurous, exciting, exhilarating, and dangerous. No matter how experienced you are, you should always wear a bike helmet when biking.

A helmet purchase is a decision that should not be taken lightly. You will be dodging trees and hurtling over rocks, so spending a bit extra on the best trail helmet is a great investment.

Safety features, fit, comfort, and type of helmet will all factor into your choice. But, with the wide variety of modern helmets available on the market, it can be difficult to choose the best mountain bike helmets for you.

We have taken a look at 5 of the best mountain bike helmets available today to help you make a more informed decision.

Best Mountain Bike Helmet Reviews​

1. JBM Adult Cycling Bike Helmet

JBM International has incorporated specialized air ventilation and aerodynamic design that lets fresh air move through your mountain bike helmet easily. The helmet’s ventilation helps cool your head without slowing you down.


This bike helmet by JBM comes in standard size with an easy-to-use adjustment dial and adjustable straps, so you can adapt this helmet to custom fit your head size. It can be worn comfortably by men and women.

This helmet has been constructed using sturdy, durable PVC and PC plastics for the helmet shell and EPS foam liner. This foam is designed to absorb the shocks felt in an impact, protecting your head.

The specialized air vent and aerodynamic design ensure that you have adequate ventilation through your helmet while not being slowed down as you cycle. Plus, you head will not overheat if you wear this helmet for extended lengths of time.

This breathable and comfortable helmet is surprisingly lightweight and comes in 18 various colors, allowing you to find one that best suits your bike color or personality.

This JBM International helmet comes with CPSC safety certification, meaning that it has met the required standards needed for proper head protection in a collision.

You can easily adjust this helmet and the padded straps don’t rub on your skin as you ride. The visor ensure that your eyes are protected from the elements, particularly sun and wind.

What’s to like about the JBM Adult Cycling Bike Helmet

The JBM Adult Cycling Bike Helmet is made of durable materials which makes it comfortable and lightweight. It features special air vents for a well-ventilated helmet.

What’s not to like about the JBM Adult Cycling Bike Helmet

Though this helmet is customizable, the JBM Adult Cycling Bike Helmet is not ideal for larger head size. Straps may loosen at times with much movement.


  • Customizable size
  • Durable PC and PVC plastic build
  • Lightweight and comfortable
  • Specialized air vents offer ultimate ventilation
  • Meets CPSC safety standards


  • Straps may loosen with movement
  • Not ideal for larger heads

2. Schwinn Thrasher Helmet

This helmet is well-known for its safety features, such as the hard shell which is great for absorbing shocks in a collision. The inside of the helmet is padded, offering comfort. It is also durable and strong – just what you want in a helmet.


This great helmet is popularly used by seasoned mountain bikers and trail riders and professionals who know how important it is to protect your head when mountain biking. The dual fit adjustment system creates a safe and snug fit while the chin guard and chin strap holds the helmet in place as you tear up the trail.

The Schwinn Thrasher has 21 integrated vents that keep your head cool as you ride. The shape of the helmet prevents sweat from building up inside. The symmetry of the helmet also stops bacteria from growing.

The moisture-wicking pads that have been integrated into the helmet help keep your head dry. The ergonomic inner wedding also allows you to wear this quality helmet comfortably and adjust it for a custom fit.

Your eyes are protected by the adjustable visor which prevents dirt and debris from getting into your eyes while also providing more protection from the sun.

This helmet is available in two colors and can be purchased in size 22 and 24. The inner pads can be removed with ease and machine washed so that they are always clean and hygienic.

What’s to like about the Schwinn Thrasher Helmet

The Schwinn Thrasher has integrated air vents to keep the biker’s head well ventilated.  It also has an adjustable mountain bike helmet design for more comfort.

What’s not to like about the Schwinn Thrasher Helmet

Although it is adjustable, this helmet is not suited for larger heads. In very hot conditions, the outer shell may deform or warp.


  • 21 integrated air vents
  • Dual fit adjustment system
  • Moisture-wicking pads
  • Detachable visor
  • Removable, machine washable inner pads


  • Not suitable for larger heads
  • Shell can warp in very hot conditions

3. Bell Transfer-9 Helmet

The Transfer-9 bike helmet is unlike anything you have seen. It is a proper mix between road riding helmet safety and motocross technology that has resulted in safe and protective gear that can be used daily and costs a lot less than many other helmets in this niche.


This helmet has a composite shell that is built to last. Weighing in at 1250 grams, this helmet is slightly heavier than most other bicycle helmets, but not so much that it will hinder your mountain biking.

The Transfer-9 has CPSC, CE EN1078, ASTM F2032-06, and ASTM F1952-00 safety certifications, so you know this helmet has been thoroughly tested for your safety.

The helmet has snap-removable, 3D-formed cheek pads that are machine washable, as is the rest of the interior padding. The antimicrobial treatment that the padding receives resists mold and odors.

The Transfer-9 comes in 14 different colors and is available in 7 sizes ranging from X-small to 2X-large. The helmet comes with 5 front vents, 4 rear vents, and 3 brow vents which keep your head well-ventilated and cool. The removable visor protects your eyes from the sun and debris.

The Soundtrax speaker pockets allow you to keep your earbuds in the pockets so you can listen to your favorite music as your ride. These trail helmets also have a GoPro camera mount so that you can record your trail rides.

What’s to like about the Bell Transfer-9 Helmet

The Bell Transfer-9 Helmet is available in 14 colors and 7 sizes.  It has a durable shell for added protection.

What’s not to like about the Bell Transfer-9 Helmet

The Bell Transfer-9 Helmet does not have much instructions on how to fit the helmet. The larger sizes are also considered to be quite small.


  • 14 different colors
  • Available in 7 sizes
  • Durable composite shell
  • Antimicrobial treatment
  • Removable visor


  • Even the larger sizes are quite small
  • No clear instructions on fitting the helmet

4. Fox Metah Mountain Bike Helmet

This helmet has great features like a large visor, extra protection at the back, and large air vent openings. The Metah has an accommodating, wide shell due to which the helmet fits comfortably, soft inner padding, and a simple adjustment system.


The lightweight, molded polycarbonate build of the shell ensures a great strength to weight ratio. The inside has the Varizorb multi-directional impact protection system that protects your entire head in a collision.

The 10 large vents ensure great air flow and the fixed visor is positioned and shaped in a way that does not impact the airflow through the helmet.

The side straps are fixed with anchors and are easy to adjust as well as take the helmet on and off. The liner has sealed edges that improve the comfort when wearing the helmet for extended amounts of time, while also offering moisture management.

There are bright, cool color schemes available that suit everyone’s taste. This affordable helmet offers great value for money, and for the price, it is hard to beat the level of protection offered.

What’s to like about the Fox Metah Mountain Bike Helmet

The Fox Metah Mountain Bike Helmet is equipped with 10 vent and has a comfortable fit. The lightweight, molded polycarbonate shell of these comfortable helmets offers protective features too.

What’s not to like about the Fox Metah Mountain Bike Helmet

Unfortunately this helmet has fewer features compared with other bike helmets sold at the same price. It does not also have an MIPS system.


  • Comfortable fit
  • 10 large air vents
  • Lightweight, molded polycarbonate shell
  • Fixed visor
  • Great coverage and protection


  • Fewer features than other bike helmets this price
  • No MIPS system

5. KINGBIKE Adult/Youth Bike Helmet

This helmet is super lightweight and comfortable while still being very durable and strong, offering proper protection for your head when you are cycling on the road, trails or even technical trails.


The outer shell and the foam liner have been fused together through the in-mold construction. The liner absorbs any impact experienced in a collision. The fusing process gives the helmet a better ventilation system, effectively cooling your head and keeping the helmet lightweight and durable.

This helmet comes with a rear light that increases your visibility. The light has three modes: fast flash, always on, and slow flash.

The 24 air vents give you ample ventilation to ensure you get great temperature regulation while making sure that the helmet does not slow you down.

You can purchase these mtb helmets in two sizes: M/L which fits head sizes 56 to 60 cm, and L/XL which fits head sizes 59 – 63 cm. The adjustable dial system lets you custom fit this helmet to your head shape and size.

The visor protects your eyes from the wind, rain, dust, and sun, while the rain cover protects your helmet from damage and aging.

What’s to like about the KINGBIKE Adult/Youth Bike Helmet

The KINGBIKE Adult/Youth Bike Helmet boasts of a strong and durable carbonite shell for maximum protection and comes with a rear safety light.

What’s not to like about the KINGBIKE Adult/Youth Bike Helmet

This helmet may be a bit small for larger adults as it is more of a youth helmet. The buckle may tend to break or give.


  • Available in 12 sleek colors
  • Fits head sizes 56 – 63 cm
  • Visor and helmet rain cover
  • 24 air vents for ultimate breathability
  • Rear safety light
  • Strong, durable polycarbonate shell


  • The helmet is too small for a larger adult
  • The buckle can give

6. POC Tectal Bike Helmet

POC first began producing gear for snow sports and have carried this distinctive style into their cycling kit. With 15 vents and a one-hand adjustment system, you have a comfortable and easy-to-use helmet that will protect your head no matter whether you are ramping, downhill riding, trail riding, or road racing.

Product highlights

This helmet has 9 vents across the forehead, 3 on the crown, and 5 vents at the back. These air vents allow cool, fresh air to flow through the helmet with ease, making it one of the most well-ventilated helmets on the market.

Thanks to these air vents, the Tectal is a lightweight helmet with a low weight of just 340 grams. It is so light that you may even forget that it is on your head.

The included large adjustable visor can be tailored to be out of your line of sight if you don’t want to use it. However, if you do, it is as easy as adjusting the anodized pivots and set screw, which also give the helmet a high-end, sporty look and helps accommodate goggles.

This helmet sits low on your head, protecting your temples as well as the base of your skull, offering you reassuring protection. There is no MIPS system with this helmet, but it does have an Aramid fiber grid which gives protection, as well as the Recco reflector system. This system allows first responders to find you if you are injured or lost.

What’s to like about the POC Tectal Bike Helmet

This helmet can be purchased in 10 different colors, so you can find one to suit your bike color or your personal choice. The breathability of this helmet is a huge plus.

What’s not to like about the POC Tectal Bike Helmet

The POC Tectal unfortunately comes with a high price tag, costing considerably more than some of the other options on this list, making it one of the most expensive mountain biking helmets.​


  • ​Easy to use and adjust
  • Great safety features
  • ​15 vents for breathability
  • ​​Goggle strap to wear goggles underneath comfortably
  • Available in 10 colors


  • Very expensive
  • No MIPS system


When you are looking for the best mountain bikes helmets, it is vital that you assess the type of riding you do – so whether you should opt for recreational bike helmets or ones designed for extreme riding and trail and enduro riders. This influences the features you need in a mountain biking helmet. Keep in mind that safety always comes first.

Finding the correct style and fit can save your life. Most helmets come with additional helmet features, but durability and fit are the main priority.

All of the helmets on this list are safety certified and provide proper protection in a collision. With that being said, our top recommendation is the Schwinn Thrasher Helmet. This helmet is one of the most popular helmets on the market thanks to its 21 integrated air vents that offer excellent breathability.

The dual fit adjustment system gives you a custom fit while the moisture-wicking pads reduce sweat in the helmet. Plus, the inner pads are removable and machine washable.

Recent Content