13 Best Mountain Bike Helmets For Big Heads in 2020


I’ve noticed that some people with a 60 or 61 centimeter head-size think that they have a big head. That is, until they meet someone with a 65 centimeter or larger head, and then they’re like “Wow, and I thought I had problems trying to find a helmet that fits”.

Sixty-one centimeter helmets are a dime a dozen, but finding a helmet for larger sized heads can be difficult especially when you’re talking about 65+ centimeter sizes. Difficult, but not impossible.

MTB rider wearing full-face helmet
Image courtesy pxfuel.com

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If you’re a mountain bike rider with a larger than average head-size then I hope you will find this guide useful in your quest to continue riding safely in a properly certified helmet, both trail riding (CPSC 1203 certified) and downhill (ASTM1952 certified).

In our list below we have MTB helmets up to 67cm (26 inches), so, all going well that should just about cover most big heads, but not all, unfortunately. We shall keep looking and update accordingly.

Our objective here is not to recommend any of the helmets listed below. The objective is simply to make your search easier. In order to do that you need to know your helmet size in inches and/or centimeters because we have listed the helmets in order of size, biggest first. Within each size group, there may be several different helmets sorted alphabetically.

Before you start looking for a helmet, please be 100% sure of your head size. See our article ‘How To Know Your Helmet Size’ for more information.
A properly fitted helmet is the most important aspect of helmet safety. If you order the wrong size helmet, you will waste time and money having to return it. Be sure of the size before you place an order!

JUMP TO :
Mountain Bike Helmets Larger Than 67 cm (26.4 Inches)
Mountain Bike Helmets Up To 67 cm (26.4 inches)
+++Smith Convoy MIPS MTB Helmet
Mountain Bike Helmets Up To 66 cm (26 inches)
+++7iDP Project 23 ABS MTB helmet
Mountain Bike Helmets Up To 65 cm (25.6 inches)
+++Bell 4Forty MIPS adult MTB helmet
+++Bell Sixer MIPS Adult MTB Helmet
+++Giro Artex MIPS Adult MTB Helmet
+++Giro Fixture MIPS Adult MTB Helmet
+++Troy Lee Designs D3 Fiberlite Helmet
Mountain Bike Helmets Up To 64 cm (25.2 inches)
+++7iDP Project 23 Fiberglass MTB Helmet
+++7iDP Project 23 Carbon MTB Helmet
+++100 Percent Status Downhill & BMX Helmet
+++Fox Proframe Full Face MIPS MTB Helmet
+++Fox Rampage Comp Infinite MIPS MTB Helmet
+++Fox Ranger MTB Helmet

Mountain Bike Helmets Larger Than 67 cm (26.4 Inches)

We searched but were unable to find any mountain bike helmets that fit our criteria in the greater than 67cm size range. That criteria being that the helmet has provable CPSC or CE certification, and that the purchase is from a company that I would feel confident about sending my money to.

If you find that you need a helmet larger than the 67 centimeter helmet listed below, there’s no harm in reaching out to one of the manufacturers that make larger helmets and see if they will make you a customized helmet. You could try Smith Optics as they already make a 67cm helmet, and possibly 7iDP who make helmets up to 66 centimeters. You can contact them on the links below:
Smith Optic
7IDP usainfo@7protection.com


Mountain Bike Helmets Up To 67 cm (26.4 inches)

Smith Convoy MIPS MTB Helmet – X-Large (63-67 cm / 24.8-26 .4inch)

Smith Optics is known for its quality products and prices to match. However, the Smith Convoy MIPS MTB helmet delivers quality plus the added safety of the MIPS Brain Protection System for less than USD100.

Sporting a lightweight in-mold polycarbonate shell with 20 optimized air vents gives great aerodynamics to this helmet. On the inside is an EPS liner with two-piece removable and washable padding. To ensure a comfortable fit you have Smith’s proven VaporFit System which provides a custom fit every time. The 20 air vents feed the AirEvac ventilation system to keep your head cool whatever the weather.

Main features summary:

  • Polycarbonate shell
  • MIPS protection
  • 20 Optimized vents
  • Vaporfit system
  • Washable padding
  • CPSC, CE EN1078 & AS/NZS2063 Certification
  • Weight 300 grams (Medium size)

What do the Reviews have to say about the Smith Convoy MIPS MTB helmet?

A well priced MIPS helmet with great ventilation. Comfortable and fits well. The EPS liner is exposed along the lower edge which could get damaged, plus it makes a good helmet look a bit tacky.

Link to our Smith helmet size chart.
Link to our article How to Know Your Helmet Size.

The Smith Convoy MIPS MTB Helmet X-Large size is not available on Amazon. You can try purchasing it directly from Smith Optics.


Mountain Bike Helmets Up To 66 cm (26 inches)

7iDP Project 23 ABS MTB Helmet – XX-Large (65-66 cm / 25.6-26 inch)

New to the market this year is the 7iDP Project 23 MTB helmet. The ‘ABS’ refers to the material that the shell is made from, Acrylonitrile Butadiene Styrene (ABS), no doubt you’ve heard of ABS before. There are numerous helmets made from ABS so don’t fret, plus it is ASTM1952 certified which means its tough enough for downhill riding.

7iDP Project 23 ABS MTB Helmet is available on Amazon.

Oh, and the ‘23’ is significant as well. Twenty-three refers to the number of Big Bore vents which makes it the most ventilated full-face shell helmet on the market. There are also strategically located vents to stop your goggles from fogging as well.

It comes with an easy position visor which has a crash release visor system to release the visor on impact. The internal anti-microbial padding is removable and washable.

Main features summary:

  • ABS shell
  • CRV (Crash Release Visor) system
  • 23 Big Bore vents
  • TF (Through Flow) Goggle system
  • Washable padding
  • CPSC, ASTM F1952-15, CE, AS/NZS Certified
  • Weight 850 grams (Large size)

What do the Reviews have to say about the 7iDP Project 23 ABS MTB Helmet?

Only just released. No reviews yet.

Link to our 7iDP helmet size chart.
Link to our article How to Know Your Helmet Size.

The 7iDP Project 23 ABS MTB helmet is available on Amazon (link to Amazon).


Mountain Bike Helmets Up To 65 cm (25.6 inches)

Bell 4Forty MIPS Adult MTB Helmet – X-Large (61-65 cm / 24-25.6 inch)

The Bell 4Forty is a highly rated Mountain Bike Helmet which uses Bell’s fusion in-mold process to create a sturdier helmet with the polycarbonate outer shell fused to the inner EPS foam liner. The built-in MIPS Brain Protection System is integrated with the Float Fit dial adjustment system which has an easy to turn rubber dial.

Bell 4Forty MIPS Adult MTB Helmet is available on Amazon.

Superior comfort is provided by the 15 vents and the Sweat Guide pad system which draws sweat away from the forehead before it get near the rider’s eyes. The convenient Goggle-guide with adjustable Visor can accommodate both the rider’s riding goggles as well as sunglasses.

Weighing in at just 380 grams (Medium size), this helmet is a winner at a price of less than USD100.

Main features summary:

  • Fusion in-mold Polycarbonate shell
  • MIPS Protection
  • 15 large vents
  • Float Fit™ System
  • Sweat Guide™ padding
  • CPSC bicycle and CE:EN1078 certified
  • Weight 380 grams

What do the Reviews have to say about the Bell 4Forty MIPS adult MTB helmet?

Dozens of reviews online with positive comments on the comfort and value for money, particularly as the helmet has MIPS built-in. Also comments about the good fit and easy adjustment system.

There were a couple of complaints about retention system failure two years ago, but I can’t imagine it was a serious problem otherwise the product would have been withdrawn.

Link to our BELL helmet size chart.
Link to our article How to Know Your Helmet Size.

The Bell 4Forty MIPS adult MTB helmet is available on Amazon (link to Amazon) . The X-Large size being available in Gray/Crimson, and Black.


Bell Sixer MIPS Adult MTB Helmet – X-Large (61-65 cm / 24-25.6 inch)

The Bell Sixer MIPS incorporates another new technology called progressive layering as well as the fusion in-mold polycarbonate shell fused with the EPS foam liner. Progressive layering layers different densities of EPS foam for better energy absorption in the event of an accident. These technologies together with MIPS Brain Protection System makes the Bell Sixer MIPS MTB helmet one of the safest in its field.

Bell Sixer MIPS Adult MTB Helmet is available on Amazon.

This stylish helmet has great aerodynamics along with a dual-flow ventilation system utilizing 26 vents and 4 brow ports for keeping goggles clear whilst riding. In addition, there is 4 position adjustable visor which can be adjusted on the fly. The fitting system is the easily adjustable Float Fit Race system which integrates nicely with the built-in MIPS system.

Inside there is the Sweat Guide pad design which draws sweat away from the forehead and includes quick-drying materials that help to stop the growth of bacteria and fungi. On the outside there is also a breakaway camera mount for those who wish to record their adventures.

Main features summary:

  • Fusion in-mold Polycarbonate shell
  • 26 air-vents, and 4 brow ports
  • Float Fit Race System
  • Quick Dry X-Static padding
  • 4 Position Adjustable Visor
  • Breakaway Camera Mount
  • CPSC bicycle and EN1078 certified
  • Weight 410 grams (Medium size)

What do the Reviews have to say about the Bell Sixer MIPS adult MTB helmet?

The comfort level ranges between fairly comfortable to extremely comfortable. Looks good, and is a true XL size and feels good on the head. A couple of crashes reported with little damage to the helmet. As expected the positive reviews far outweigh the negative reviews. One reviewer doesn’t like the color of the chin straps, another said it was too heavy and wasn’t satisfied with the sweat management system.

Link to our BELL helmet size chart.
Link to our article How to Know Your Helmet Size.

The Bell Sixer MIPS adult MTB helmet is available on Amazon (link to Amazon). X-Large size is only available in black.


Giro Artex MIPS Adult MTB Helmet – X-Large (62.5-65 cm / 24.5-25.6 inch)

The Giro Artex MIPS helmet is described as luxurious and secure. Why luxurious, you ask. That is due to the Roc Loc® 5 Air System which not only adjusts the fit to your head size, but it suspends the helmet slightly above the top of the skull thus allowing cool air to flow directly over your head aided by 25 wind tunnel vents and internal channeling.

Giro Artex MIPS Adult MTB Helmet is available on Amazon.

And, of course it’s secure due to the inbuilt MIPS Brain Protection System, and the four piece polycarbonate interlocking hardbody shell with an internal EPS liner.

Main features summary:

  • Polycarbonate shell
  • MIPS Protection
  • 25 Wind-tunnel vents
  • Roc Loc® 5 Air System
  • CoolFit Anti-microbial padding
  • Removable Quick Link Visor
  • CPSC bicycle certified

What do the Reviews have to say about the Giro Artex MIPS adult MTB helmet?

After a great introduction to this luxurious and secure MTB helmet, the reviews are not so good! The straps are too short, and not thick enough. The visor falls off. Maybe up to a quarter of reviewers are dissatisfied. On the positive side though, that leaves three-quarters of reviewers who were generally happy with their purchase. Light and comfortable, easily adjusted.

Link to our GIRO helmet size chart.
Link to our article How to Know Your Helmet Size.

The Giro Artex MIPS adult MTB helmet is available on Amazon (link to Amazon).


Giro Fixture MIPS Adult MTB Helmet – X-Large (58-65 cm / 22.8-25.6 inch)

The Giro Fixture MIPS XL was created especially for riders with XL-sized heads, and inspired by the success of Giro’s standard Fixture helmet. In the style of the Giro Fixture the Fixture MIPS XL is built with the In-mold polycarbonate shell with an EPS liner and MIPS Brain Protection System built-in as well.

Giro Fixture MIPS Adult MTB Helmet is available on Amazon.

The Roc Loc Sport fit system makes for easy fit adjustability, and the 18 vents and Extra-plush padding provide for extra comfort.

Good valued MIPS helmet for less than USD100.

Main features summary:

  • Polycarbonate shell
  • 18 air vents
  • MIPS protection
  • Roc Loc® Sport fit system
  • Extra-Plush Quick Dry padding
  • Removable Visor
  • CPSC bicycle certified

What do the Reviews have to say about the Giro Fixture MIPS adult MTB helmet?

Plenty of reviews praising the XL size and fit, then the obligatory one that complains that it doesn’t fit. Positive reviews clearly out-numbered any negative reviews. The helmet is lightweight, well ventilated and very comfortable.

Link to our GIRO helmet size chart.
Link to our article How to Know Your Helmet Size.

The Giro Fixture MIPS adult MTB helmet is available on Amazon (link to Amazon).


Troy Lee Designs D3 Fiberlite HelmetXXL (63-65 cm / 24.75-25.6 inch)

At last, a helmet for the serious downhill racers. The Full-Face D3 Fiberlite consists of a lightweight fiberglass shell with an EPS interior. Wind-tunnel tested aerodynamics and 20 intake and exhaust ports provide maximum ventilation through optimized internal channeling. Anatomic 3D cheek pads and the removable and washable Dri-Lex liner makes for a comfortable fit.

Troy Lee Designs D3 Fiberlite Helmet is available on Amazon.

Features internal cavities for audio integration, and quick-release 3D cheek pads for emergency helmet removal. Certified for Downhill as well as BMX.

Main features summary:

  • Fiberglass Shell
  • Wind-tunnel tested Aerodynamics
  • 20 Intake and Exhaust Ports
  • Breakaway Visor Screws
  • Anatomic 3D Cheek Pads
  • Washable Dri-Lex Liner
  • Cavities for Audio Integration
  • ASTM F1952-DH, ASTM F2032-BMX
  • Weight 1225 grams

What do the Reviews have to say about the Troy Lee Designs D3 Fiberlite helmet?

Outstanding reviews. Super comfortable, fits well, accurate sizing, pads easily removed and installed. All good except for one buyer who had some issues with a loose liner, and one other who bought it thinking that it had MIPS.

Link to our Troy Lee Designs helmet size chart.
Link to our article How to Know Your Helmet Size.

The Troy Lee Designs D3 Fiberlite helmet is available on Amazon (link to Amazon).

We have 3 more MTB helmets over on our Bicycle Helmets for Large Heads page, all size up to 65cm (25.6 inch) if you want to take a look:

Giro Chronicle MIPS MTB Helmet – X-Large (61-65 cm / 24-25.6 inch)
Giro Montaro MIPS Adult MTB Helmet – X-Large (61-65 cm / 24-25.6 inch)
Giro Radix MIPS Adult MTB Helmet – X-Large (62.5-65 cm / 24.5-25.6 inch)


Mountain Bike Helmets Up To 64 cm (25.2 inches)

7iDP Project 23 Fiberglass MTB Helmet – XX-Large (63-64 cm / 24.75-25.25 inch)

From the same line as 7iDP Project 23 ABS above in the ‘Up to 66 cm’ section, but this time it has a fiberglass shell along with a larger price tag. As with the ABS model, the fiberglass model is ASTM1952 certified, which means its tough enough for downhill riding.

7iDP Project 23 Fiberglass MTB Helmet is available on Amazon.

Also, as with the ABS model, ‘23’ refers to the number of Big Bore vents which makes it the most ventilated full face shell helmet on the market. There are also strategically located vents to stop your goggles from fogging as well.

It comes with an easy position visor that has a crash release visor system to release the visor on impact. The internal anti-microbial padding is removable and washable.

What it does have that the ABS model doesn’t have is SERT. Seven Energy Reduction Technology is a smart foam which acts similar to MIPS. SERT was developed in 7iDP’s Prolab facility and has undergone extensive testing. It’s purpose is to manage rotational forces and reduce impact energy on the brain in the event of an accident. 7IDP claims that SERT can reduce energy transfer to the brain by up to 20%.

Main features summary:

  • Fiberglass shell
  • S.E.R.T. (Seven Energy Reduction Technology)
  • CRV (Crash Release Visor) system
  • 23 Big Bore vents
  • TF (Through Flow) Goggle system
  • Washable padding
  • CPSC, ASTM F1952-15, CE, AS/NZS Certified
  • Weight 1010 grams (Large size)

What do the Reviews have to say about the 7iDP Project 23 Fiberglass MTB Helmet?

Only just released. No reviews yet.

Link to our 7iDP helmet size chart.
Link to our article How to Know Your Helmet Size.

The 7iDP Project 23 Fiberglass MTB helmet is available on Amazon (link to Amazon).


7iDP Project 23 Carbon MTB Helmet – XX-Large (63-64 cm / 24.75-25.25 inch)

This is the same as the previous helmet, except that this time the helmet has a Carbon shell for extra strength. This is a top of the range helmet for serious downhill riders.

7iDP Project 23 Carbon MTB Helmet is available on Amazon.

Main features summary:

  • Carbon shell
  • S.E.R.T. (Seven Energy Reduction Technology)
  • CRV (Crash Release Visor) system
  • 23 Big Bore vents
  • TF (Through Flow) Goggle system
  • Washable padding
  • CPSC, ASTM F1952-15, CE, AS/NZS Certified
  • Weight 1010 grams (Large size)

What do the Reviews have to say about the 7iDP Project 23 Carbon MTB Helmet?

Only just released. No reviews yet.

Link to our 7iDP helmet size chart.
Link to our article How to Know Your Helmet Size.

The 7iDP Project 23 Carbon MTB helmet is available on Amazon (link to Amazon).


100 Percent Status Downhill & BMX Helmet XX-Large(6364 cm / 24.75-25.25 inch)

Featuring a fiberglass shell with an EPS liner the 100 Percent Status helmet represents exceptional value at a very reasonable price. On the inside there is a washable comfort liner, cheek pads and chin strap covers for provide great comfort. The polyurethane chinbar is also padded for enhanced impact protection.

100 Percent Status Downhill & BMX Helmet is available on Amazon.

Utilizing the Active Cooling System from 100 Percent’s Aircraft helmet, you’ll keep a cool head in all situations. And, of course, there’s an adjustable visor.

Main features summary:

  • Fiberglass shell
  • EPS Liner
  • Active Cooling System
  • Padded PU Chinbar
  • Removable and Washable Comfort Liner and Cheek Pads
  • Adjustable Visor
  • ASTM F1952, ASTM F2032, CPSC, CE & AS/NZS certified
  • Weight 950 grams (Medium size)

What do the Reviews have to say about the 100 Percent Status Downhill & BMX helmet?

Good reviews. Overall good look and feel, very comfortable. Good ventilation in the summer heat. One reviewer states that it is more of a BMX helmet than a downhill one, and one other suggests there could be more protection at the base of the helmet.

Link to our 100 Percent helmet size chart.
Link to our article How to Know Your Helmet Size.

The 100 Percent Status Downhill & BMX helmet is available on Amazon (link to Amazon).


Fox Proframe Full Face MIPS MTB HelmetX-Large(63-64 cm / 24.8-25.2 inch)

The original full-face downhill trail helmet and still going strong, it’s little wonder that the Fox Proframe Full Face MIPS MTB Helmet is still popular in 2020. Extremely lightweight at only 750 grams for the Medium size, the Fox Proframe was designed with mountain bikers and enduro racers in mind.

Fox Proframe Full Face MIPS MTB Helmet is available on Amazon.

With the MIPS Brain Protection System as well as Fox’s proprietary Varizorb multi-density EPS foam lining you are well covered in the event of a hard fall.

The In-mold polycarbonate shell boasts 24 Big Bore vents for maximum air-flow, along with moisture-wicking anti-microbial lining. The visor is a fixed in-place, non-removable visor. The helmet is held firmly to your head with the Fidlock® SNAP helmet buckle.

Main features summary:

  • In-Mold Polycarbonate shell
  • 24 Big Bore vents – 15 intakes and 9 exhaust
  • Varizorb Multi-density EPS Foam
  • Anti-microbial padding
  • Fidlock® SNAP buckle
  • CPSC, EN1078, AS/NZS & ASTM F1952 certified
  • Weight 750 grams (Medium size)

What do the Reviews have to say about the Fox Proframe Full Face MIPS MTB Helmet?

A lot of 5 star ratings for the Fox Proframe. The only negative review that I could find mentioned the plastic edges of the MIPS liner rub against your forehead and gets annoying on long rides.

Other than that, what can you say about a helmet that has been around for around 7 years and is still popular today.

Link to our Fox Racing helmet size chart.
Link to our article How to Know Your Helmet Size.

The Fox Proframe Full Face MIPS MTB Helmet is available on Amazon (link to Amazon).


Courtesy The Loam Wolf on Youtube.

Fox Rampage Comp Infinite MIPS MTB Helmet – XXL (63-64 cm / 24.75-25.25 inch)

Drawing from the success of the championship-winning Rampage Pro Carbon, the Fox Rampage Comp Infinite helmet looks a winner on style, speed and safety. With the MIPS Brain Protection System built-in to this winning design, the fiberglass shell and EPS lining have your head safety covered.

Fox Rampage Comp Infinite MIPS MTB Helmet is available on Amazon.

With a fully adjustable goggle compatible visor you’ll see clearly while the removable and washable moisture-wicking liner keeps you comfortable.

Fully certified for downhill riding, you will feel unencumbered by the lightness of the fiberglass shell, while the reliable double-d ring closure keeps it firmly strapped to your head.

Main features summary:

  • Fiberglass Shell
  • EPS internal lining
  • Washable Padding
  • Double-D Ring Fasteners
  • 11 Air-Vents
  • Adjustable visor
  • CPSC, EN1078, AS/NZS 2063, ASTM 1952-15DH Certified
  • Weight 1260 grams (Medium size)

What do the Reviews have to say about the Fox Rampage Comp Infinite MIPS MTB helmet?

Very rarely do you find reviews/ratings with absolutely zero 1 or 2 star ratings. All ratings for the Fox Rampage Comp are positive, even the one solitary 3 star rating said that it’s a good helmet but a little heavy.

Link to our Fox Racing helmet size chart.
Link to our article How to Know Your Helmet Size.

The Fox Rampage Comp Infinite MIPS MTB helmet is available on Amazon (link to Amazon).


Fox Ranger MTB Helmet X-Large(5964 cm / 23.25-25.25 inch)

In the Fox Ranger MTB helmet Fox’s plan was to keep it simple. They have succeeded in not only keeping it simple but also keeping it within a price range that everyone can afford, provided you don’t need or want all the bells and whistles or any other unnecessary features. If that’s what you’re looking for then you won’t be disappointed.

Fox Ranger MTB Helmet is available on Amazon.

An in-mold polycarbonate shell with EPS lining, 8 Big Bore vents, single-handed adjustable retention system, and a removable visor. What else do you need?

But don’t worry, it is CPSC, CE and AS/NZS certified. And, it’s ridiculously lightweight!

Main features summary:

  • Polycarbonate shell
  • EPS liner
  • 8 Big Bore vents
  • One-handed adjustment system
  • Lightweight
  • CPSC, CE & AS/NZS certified

What do the Reviews have to say about the Fox Ranger MTB Helmet?

The reviews say that it has great construction, great design, comfortable and a great price. However, it’s not great in hot weather.

Link to our Fox Racing helmet size chart.
Link to our article How to Know Your Helmet Size.

The Fox Ranger MTB Helmet is available on Amazon (link to Amazon).


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