Find the best mountain bike helmets here amongst our pick of favourites. A mountain bike lid is protection but it can also be stylish and comfy.

The best mountain bike helmets ridden and rated.

Read more: Black Friday mountain bike deals for 2020

A mountain bike helmet has more head coverage than a road helmet. MTB helmets also have peaks to keep sun (or rain) out of your eyes. They are much lighter and more ventilated than a motorbike helmet.

Mountain biking is very unpredictable, which makes it exciting, but now and again things can go wrong and you will end up eating dirt. To this end we recommend wearing a helmet all times because landing on your head is incredibly dangerous – it can lead to a fractured skull, concussion or much worse.

Any bicycle helmet will work off-road but if you’re a trail rider you’ll want to consider something that is a little bit more robust that. Typically a trail helmet extends down at the back and over the temples and also features a stronger structure with the addition of MIPS liner to help dissipate impact forces. The extra protection does mean a trail helmet may run a little hotter, but most include good quality padding to soak up sweat.

Standard trail features include an adjustable retention device, in-moulded and bottom wrapped micro shell and a matching visor, which should be fully adjustable, so you can tilt it up and down to shade your eyes in bright sunshine. Some of the best trail helmets also get add-ons, like integrated adapters to mount a head cam, magnetic closures, goggle strap clips, storage bags and one here even has a sensor that detects if you’ve had a accident.

The best mountain bike helmets

These lids our are what we think are the best mountain bike helmets available currently.

  • Bell Super 3 – Best Buy
  • Oakley DRT5– Best Buy
  • Endura Singletrack II
  • Bell 4Forty
  • Giro Tyrant
  • Troy Lee Designs A2
  • Giro Montaro
  • Endura MT500
  • Fox Speedframe Pro

‘View Deal’ links

You will notice that beneath each of the best mountain bike helmets product summary is a ‘View Deal’ link. If you click on one of these links then mbr may receive a small amount of money from the retailer should you go to purchase the product from them. Don’t worry, this does not affect the amount you pay.

best mountain bike helmets

Bell Super 3

Does everything as well as the top-end helmets whilst costing less

Price: £119.99 | Weight: 426g | Sizes: S, M, L

Pro: Even more of a bargain

Con: Can run on the warm side

The Bell Super 3 is the best trail helmet because it strikes the right balance between durability and venting. It’s weighty and the lower edge where the EPS is left exposed is starting to look tatty but its cracking value for money and the chin bar compatibility lifts it to a whole different level.

Read review of the Bell Super 3 helmet

oakley drt5

Oakley DRT5

One of the most comfortable helmets we’ve experienced

Price: £159.00 | Weight: 440g | Colours: White, blue/black, grey, green

Pro: Excellent for hot heads

Con: More expensive than Bell Super 3

At 440g the Drt5 is on the heavy side, but comparable with favourites like the Bell Super 3, and its secure hold on your head means it’s not really noticeable when riding. It’s also slightly more money than top end lids like the Giro Montaro or Endura MT500. But it’s a step up in quality from both of those, the finish is brilliant, and the extra features that could be so gimmicky are actually astute and desirable.

Read review of the Oakley DRT5 helmet

Fox Speedframe Pro

Fox Speedframe Pro

Well thought out, comfortable, protective and a good price

Price: £139.99 | Weight: 437g | Sizes: S, M, L

Pro: Form, function and a fair price

Con: Liner moves around a little

A new kid on the block, but it has MIPS and a dual-density EPS, it also fits great and feels comfortable. It also looks way better than any previous Fox helmet we’ve tested, and while that shouldn’t matter, somehow it does. Offera a ton of protection and have all the goggle-parking, camera-wearing, visor-tilting features you’ll ever need.

Read review of Fox Speedframe Pro helmet

best mountain bike helmets

Endura Singletrack II

Singletrack II: The Venting Strikes Back

Price: £74.99 | Weight: 284g | Sizes: S/M, M/L, L/XL | Colours: Blue, black, white

Pro: Impressively light and ariy

Con: Not MIPS

Although it still feels novel to see Endura on a helmet (they’ve not been making helmets for very long) it has become instantly assuring.This lid reduces the price by omitting the extra protection of the drinking-straw-like Koroyd filling of its higher-end helmets. Whether this directly reduces weight and improves ventilation is difficult to say, but there’s no debating the fact that the Singletrack II in an impressively light and brilliantly cool-running helmet. And one that still offers good back-of-head protection depth. The retention strap may not wrap all the way around the head but it does the job just fine. An excellent warm weather lid.

Read review of the Endura Singletrack II helmet

best mountain bike helmets

Bell 4Forty MIPS

Ticks every box

Price: £89.99 | Weight: 370g | Sizes: S, M, L, XL

Pro: Stable, light and MIPS

Con: Not-indexed visor can go wonky

Following the agreeable modern trend of premium spec helmets coming it at well under £100, the 4Forty has MIPS protection, a fully wrapped outer, a modern shape and a very tastefully done two-tone colourway. Unlike most brands, Bell integrate MIPS into their retention system which results in less interior bulk. The padding is arranged in such a clever, overlapping way that will delight those sweaty-foreheaded folks out there. It’s only the fact that it runs slightly hotter than megabucks helmets that give the game away.

Read review of the Bell 4Forty MIPS helmet

giro tyrant

Giro Tyrant

Extra peace of mind, without cooking your brain

Price: £134.99 | Weight: 623g | Colours: Yellow, blue, black | Sizes: S, M, L

Pro: Great for when full-face is too hot

Con: Not a year-round lid

This quirky looking lid is being worn by 50:01’s very own Ratboy in the marketing shots. So does that mean it’s irrelevant for the rest of us? Riders who prefer to ride loop on a Sunday instead of finding twenty different ways to slide along a log? Not in our opinion.

Read review of the Giro Tyrant helmet

Troy Lee Designs A2 MIPS

A firm rider favourite here at mbr

Price: £140.00 | Weight: 386g | Sizes: XS/S, M/L, XL/XXL

Pro: Significantly cooler than the A1

Con: Lacks a specific goggle park

There’s general consensus that Troy Lee makes some of the best-looking trail lids around. The A2 fits great, has good ventilation and a lot of protection. It’s at the pricier end of the scale at £140, but the brand’s even more comfortable, older A1 model is still a great product and cheaper too, so long as you’re cool with the helmet being, err, not so cool.

Read the review of the Troy Lee Designs A2 helmet

best mountain bike helmets

Giro Montaro MIPS

Top-quality helmet with a high level of protection and a ton of trail-friendly features

Price: £149.99 | Weight: 391g | Sizes: S, M, L, XL

Pro: Good protection that keeps its looks

Con: Multi-part pads can go AWOL in the wash

The Giro Montaro is sleek, super comfortable, full adjustable and has a ton of trail-friendly features – it doesn’t get a full 10/10 rating however due to the pads design and durability and the price.

Read review of the Giro Montaro helmet

best mountain bike helmets

Endura MT500 helmet

Takes impact protection to the next level

Price: £149.99 | Weight: 348g | Sizes: S-M, M-L, L-XL

Pro: Ticks all the important boxes

Con: Not quite as finely finished as rivals

The MT500 is packed to the gills with features, including an adjustable peak, anti-bacterial padding, eyewear dock as well as a clip-off accessory mount for a headlight or helmet-cam. The peak lifts far enough up to store goggles and the straps are held securely under the peak edges and a large (removable) clip at the back.

Read review of the Endura MT500 helmet

Due to the trickle-down effect you will see some high-end features included on budget helmets but we’ve focused on the top-tier simply because that’s where there’s the greatest choice. These helmets are more refined, harder wearing and look pretty sick too.

Key features of the best mountain bike helmets

Best mountain bike helmets protection standards

All bike helmets sold in the UK need certification. This means helmets must meet certain fixed test criteria like impact velocities, roll-off tests, and strap system strengths. This is a minimum and many modern helmets surpass these requirements by incorporating composite materials into sub frames or “roll cages” for extra protection.

Crash replacement schemes

If your helmet is involved in an accident, most manufacturers offer a reduced price crash replacement scheme. With proof of original purchase, these programmes can save you up to 50% on an expensive replacement lid.

Micro shell

To reduce damage to the EPS it’s covered with a thin plastic micro-shell. This is usually in-moulded with the EPS during the manufacturing process and can be a single or several pieces.


EPS (expanded polystyrene) foam and is at the core of the helmet. It’s lightweight, easily mouldable and works exactly like a crumple zone in a car.


Multi-directional Impact Protection System is a moveable plastic inner liner. This slides when your head hits the ground reducing the force of them impact and likelihood of a concussion or brain injury.

best mountain bike helmets


Padding thickness and density has a significant effect on sweat absorption, cooling and comfort. Thicker internal padding may run a little hotter but you’re less likely to get sweat running down your neck and the helmet will generally feel more comfortable. Channels are often formed into padding to improve air flow and speed up drying.

best mountain bike helmets

Retention device

Like on a baseball cap, a retention device allows you to adjust the fit of the helmet. Most use a rotating dial, which allows you to vary the tension with one hand while riding. On some you can also adjust the overall height of the device and starting diameter.

best mountain bike helmets


EPS can dent easily, so to increase durability it’s protected by a thin micro-shell. This is made from plastic, making it lightweight, easy to mould and available in a wide range of colours.


To keep you cool, vents at the front and back of the helmet allow air to flow across your scalp. The size and number of vents is key but it’s also important the peak integrates with the vents properly.

best mountain bike helmets


Adjustability is the name of the game – the best visors cab be tilted up and down so they’re out of your eye line when riding. Ratchet or thumb screws are handy to stop the visor rattling or falling down.

best mountain bike helmets

Goggle parking/strap gutter

On some helmets the visor can be tilted up so you can ‘park’ goggles underneath when you’re not using them. Usually this feature comes hand in hand with a strap gutter – a shallow channel on the back of the helmet that holds the strap in place.

best mountain bike helmets

Bottom wrapping

To add extra protection to a high wear area on the lower edge the micro-shell often wraps under the bottom of the helmet.

How to find your helmet size

Get hold of a fabric or paper tape measure if possible. If you don’t have one, don’t try and wrap a metal tape measure around your noggin, it doesn’t work – believe us. In the absence of a fabric/paper tape measure, find some string and wrap that around your head and note its length.

Whereabouts to measure around your head? Essentially around the widest (biggest circumference) part of your head. Around your forehead and around the most prominent bit of the back of your head. Note down the measurement in centimetres. All helmets have size ranges and with your head measured it’s then easy enough to find which sizing has your head size covered.

How often should you replace a helmet?

You should replace a helmet after any slightly significant impact or crash. A lot of helmet companies offer crash replacement schemes so it’s worth checking out their websites for info about such things.

In terms of general lifespan, it’s typically advised that you should think about replacing your helmet every two to three years. Some companies in the past have stated a longer term than this but we’d feel a bit iffy using a helmet that’s had more than three years proper trail riding use. General wear and tear as well as things like UV degradation can have negative affects on the performance and reliability of your helmet.