The best trail MTB helmets are the ones that suit the riding you actually do, not just the ones with the longest spec sheets. For UK riders, that usually means a helmet that is comfortable on climbs, secure on rough descents, stable through trail-centre turns and protective enough for woodland singletrack, bridleways, natural trails and electric mountain bike use.
That eMTB point matters. You do not need an eMTB-specific helmet, but an electric mountain bike can change how much riding you do in one session. Assistance often means more climbing, more descending, longer rides and more mixed terrain. A helmet that feels fine for a short local loop can become hot, unstable or under-protective once you are doing repeated trail-centre laps or riding through winter mud, wet roots and rough off-camber sections.
This guide focuses on open-face trail MTB helmets and high-coverage trail helmets. It does not include dedicated full-face or convertible helmets, because those are different buying decisions. If you already know you want a chin bar, read our guide to the best full-face MTB helmets 2026. If you want a removable chin bar, our best convertible MTB helmets 2026 guide is the better place to start.
For most UK eMTB and trail riders, though, a good open-face trail helmet is the one you will wear most often. It needs to fit properly, breathe well, work with glasses or goggles and give enough coverage for the riding you do week after week.
Best trail MTB helmets 2026 shortlisted
Rockrider EXPL 540 MIPS — £44.99
MET Shelter Mips — £64.99 (RRP £89.99)
Smith Pilot Mips — £69.99 (RRP £90)
Troy Lee Designs A3 Mips — From £99.99 (RRP £220)
Bluegrass Rogue Core Mips — £129.99
Fox Speedframe Pro Mips — £134.99 (RRP £174.99)
Smith Payroll Mips — £139.99 (RRP £185)
Canyon Deflectr — £159.99
Endura MT500 Mips — £162 (RRP £180)
Specialized Ambush 3 — £169
A trail MTB helmet should sit level on your head, cover the forehead properly and feel secure without needing to be over-tightened. If it moves when you shake your head, pushes into one part of your skull or makes you want to take it off after ten minutes, it is the wrong helmet for you.
Fit comes before brand, price or features. A cheaper helmet that fits properly is a better buy than a premium helmet that does not suit your head shape.
What to look for in a trail MTB helmet
The first thing to look for is fit. A helmet should feel secure without pressure points, and the retention system should fine-tune the fit rather than rescue a poor shape. Brand fit varies, so measure your head circumference but do not assume the size chart tells the whole story.
Coverage is the next big decision. A normal trail MTB helmet gives enough protection for bridleways, forest loops and moderate trail-centre riding. A deeper, high-coverage trail helmet sits lower around the back and sides of the head, which can feel more reassuring for rougher trails, eMTB riding and faster descents.
Ventilation matters because mountain bike riders still climb, even on an eMTB. A motor helps, but it does not remove effort, especially on long trail-centre climbs, slow technical ascents or summer rides. A helmet with poor airflow can quickly feel annoying, and the helmet you find annoying is the one you eventually stop wearing.
Eyewear compatibility is worth checking. If you ride in glasses, make sure the arms do not clash with the retention system. Sunglasses storage is useful on climbs and café stops. If you ride in goggles, look for an adjustable visor and secure strap support.
Rotational impact technology is also now common. Mips and similar systems are designed to help manage certain angled impacts, while some brands use their own safety technologies. No helmet removes the risk from mountain biking, but modern protection systems are worth considering, especially when they appear on affordable helmets.
Finally, think about how your helmet fits into the rest of your riding. If your eMTB riding is getting faster, longer and more committed, it may also be worth looking at protection and insurance. Our eMTB insurance UK guide explains what to think about once the value of the bike and kit starts climbing.
Best trail MTB helmets 2026
Rockrider EXPL 540 MIPS
£44.99
The Rockrider EXPL 540 MIPS is the helmet in this guide for riders who want a proper trail-style lid with modern safety technology at the lowest sensible price. That matters because not every rider buying an eMTB or trail bike wants to spend £100 to £200 on a helmet straight away, especially if they also need shoes, gloves, pedals, tools and security kit.
For newer riders, occasional riders or anyone buying their first electric mountain bike, the EXPL 540 MIPS makes a lot of sense. It gives you an MTB shape, a visor, useful ventilation and MIPS protection without pushing into premium money. It is not trying to be an enduro helmet, and it is not pretending to be as refined as the more expensive options here. Its appeal is value.
On steady trail-centre loops, bridleways, woodland tracks and general off-road riding, this is the sort of helmet that does the job without drama. It gives enough of a trail feel to make more sense than a basic leisure cycling helmet, but it keeps the price low enough to be accessible.
The compromise is refinement. More expensive helmets will usually feel better ventilated, more stable, lighter, better finished and more adjustable. Riders who are already riding faster, spending a lot of time in goggles or doing rougher descents may want more coverage and a better fit system.
But as a first proper trail MTB helmet, the Rockrider EXPL 540 MIPS is hard to ignore. If your priority is getting a usable, modern open-face mountain bike helmet without spending much, this is the budget pick.
Pros
Excellent price for a MIPS trail helmet
Sensible option for new riders
Proper MTB-style shape and visor
Cons
Less refined than premium helmets
Specifications
Type: Open-face trail MTB helmet
Rotational protection: MIPS
Fit system: Dial-adjust retention system
Ventilation: Fixed trail visor
Best for: budget trail riding, bridleways and first eMTB helmets
MET Shelter Mips
£64.99 (RRP £89.99)
The MET Shelter Mips is a sensible trail helmet for riders who want a straightforward open-face design with modern protection and good comfort. It is not trying to be the most aggressive helmet here, and that is part of why it works.
MET positions the Shelter around trail and eMTB use, with extended rear head coverage, an integrated visor, Safe-T Sport fit system, 12 vents and sunglasses ports. That gives it a useful everyday trail feature set without making it feel overcomplicated.
This is a helmet for riders who want something easy to wear. It suits bridleways, trail centres, mellow eMTB rides, local woodland loops and mixed-surface exploring. It is not the obvious choice if you want maximum open-face coverage for rough descents, but it is a good option if your riding is more trail than enduro.
The Shelter Mips makes particular sense for riders who value simplicity. It does not have the unusual safety story of the Canyon Deflectr or the deep, premium feel of the Troy Lee Designs A3, but it does have the core ingredients many riders want: Mips, extended coverage, useful ventilation and a comfortable fit system.
Compared with the Smith Pilot, the MET Shelter feels a little more traditional in shape and layout. Both are good under-£100 options, and the right choice may come down to fit and brand preference. The Smith has a cleaner look and strong eyewear integration, while the MET feels like a practical, no-fuss trail helmet.
If you want a simple, affordable open-face helmet for trail rides that are more about exploring and trail centres than enduro-style descending, the Shelter Mips is a very sensible buy.
Pros
Simple and comfortable trail design
Mips included
Good everyday eMTB option
Cons
Not as confidence-inspiring as deeper helmets
Specifications
Type: Open-face trail MTB helmet
Rotational protection: Mips
Fit system: Safe-T Sport
Ventilation: 12 vents with internal channeling
Coverage: Extended rear head coverage
Best for: everyday trail riding and mixed eMTB use
Smith Pilot Mips
£69.99 (RRP £90)
The Smith Pilot Mips is one of the easiest trail MTB helmets to recommend because it gets the value equation right. It comes from a recognised helmet and eyewear brand, includes Mips rotational impact protection, weighs a claimed 370g in a medium and sits below the price of many premium trail helmets.
That makes it a strong choice for riders who want a proper MTB and eMTB helmet without jumping straight into £150-plus territory. It is especially relevant for newer riders, occasional trail riders or anyone buying their first electric mountain bike and trying to keep the rest of the kit budget under control.
On the trail, the Pilot is simple in the right way. It has enough coverage to feel like a proper mountain bike helmet, but it does not feel bulky or overbuilt. The shape is clean, the fit is straightforward and the weight is well judged for longer rides. It is not an enduro helmet and it is not trying to be one. It is a trail helmet for real-world riding.
The fixed visor is the main compromise. It sits in a sensible position for normal riding, but it cannot be lifted for goggles or adjusted for low sun. Riders who want more premium details, deeper coverage or better goggle compatibility may want to spend more.
For general trail riding, local woods, bridleways and eMTB loops, though, the Pilot is very easy to justify. If you are buying an affordable electric mountain bike and want a sensible helmet to match, this is one of the best premium-brand options under £100. Our best eMTB under £3,000 guide follows a similar principle: spend where it matters, but do not assume the most expensive option is automatically right.
Pros
Strong value from a premium helmet brand
Mips included
Comfortable for everyday trail and eMTB riding
Cons
Fixed visor limits adjustment
Specifications
Type: Open-face trail MTB helmet
Rotational protection: Mips
Fit system: Adjustable dial fit system
Ventilation: 13 fixed vents
Weight: 370g claimed, size medium
Best for: trail centres, bridleways, woodland loops and first eMTB helmets
Troy Lee Designs A3 Mips
From £99.99 (RRP £220)
The Troy Lee Designs A3 Mips is a premium open-face trail helmet for riders who want deeper coverage, strong ventilation and a more substantial feel than a simple trail lid. It sits naturally in the serious trail, enduro and eMTB space, but without moving into full-face territory.
The A3 has B-Series Mips, EPS and EPP construction, a Fidlock magnetic buckle, a three-way Magnajust visor and goggle storage under the raised visor. It is a highly featured helmet, but its real appeal is the secure, wrapped feel once it is fitted properly.
On UK trails, that deeper coverage makes sense. Wet roots, rough trail-centre sections and repeated eMTB descents can make a lighter helmet feel a little minimal. The A3 gives more reassurance without becoming too hot or closed-in. Ventilation is strong for a helmet with this much coverage, with 16 vents and internal channeling helping it stay realistic for climbing as well as descending.
It is not the lightest open-face helmet, and the brow pad setup may not suit every rider. That is worth taking seriously because helmet comfort is personal. Some riders will love the plush, secure feel. Others may prefer something lighter and less noticeable.
If the fit works for you, though, the A3 is one of the strongest premium trail MTB helmets here. It suits riders who want a helmet that feels more protective than a basic open-face, but who still want airflow, hearing and the simplicity of an open shell.
Pros
Excellent ventilation for a deep-coverage trail helmet
Secure, confidence-inspiring fit
Fidlock buckle is easy to use with gloves
Cons
Not the lightest open-face MTB helmet
Specifications
Type: Open-face trail, enduro and eMTB helmet
Rotational protection: B-Series Mips
Fit system: TLD V3 precision fit system
Ventilation: 16 vents with internal channeling
Visor: Three-way Magnajust adjustable visor
Best for: premium trail, rougher descents and eMTB riding
Bluegrass Rogue Core Mips
£129.99
The Bluegrass Rogue Core Mips is a strong all-round trail helmet for riders who want comfort, Mips protection, goggle compatibility and a premium feel without going too deep into enduro territory. It sits neatly between the lighter, simpler options and the more substantial high-coverage helmets in this guide.
Its appeal is that it feels familiar straight away. Some helmets need explaining. The Rogue Core Mips does not. It has extended rear coverage, Mips-C2 protection, a Fidlock buckle, an adjustable visor, 16 vents and a comfortable fit system. That is exactly the kind of feature mix many trail and eMTB riders actually want.
On the trail, the Rogue Core Mips should suit a wide spread of riders. It is protective enough for proper off-road use, but not so bulky that it feels excessive on bridleways, woodland loops or everyday trail-centre rides. It also has good eyewear and goggle compatibility, which is useful for UK riding where conditions can change quickly.
Compared with the Troy Lee Designs A3, the Bluegrass feels cleaner and more straightforward. It does not have quite the same deep, substantial feel, but it is easier to live with and has a strong balance of comfort, ventilation and useful details.
The Fidlock buckle is a genuine bonus, especially with gloves. That might sound minor until you are trying to fasten a helmet in cold weather or with winter riding kit on.
If you want one open-face trail MTB helmet for eMTB riding and do not want to overthink the choice, the Rogue Core Mips is one of the safest all-round options.
Pros
Comfortable and easy to live with
Mips-C2 and Fidlock buckle included
Good ventilation and goggle compatibility
Cons
Less distinctive than some premium rivals
Specifications
Type: Open-face trail MTB helmet
Rotational protection: Mips-C2
Fit system: Safe-T Heta fit system
Ventilation: 16 vents
Fastening: Fidlock buckle
Best for: riders wanting a comfortable all-round trail helmet
Fox Speedframe Pro Mips
£134.99 (RRP £174.99)
The Fox Speedframe Pro Mips is the feature-packed trail helmet in this guide. It is aimed at riders who want a proper premium trail lid with strong ventilation, a secure fit, useful details and a design that still feels open and rideable rather than overly enduro-focused.
The Speedframe Pro sits in a very useful place for eMTB riding. It is more refined than budget trail helmets, but not as bulky as the deepest high-coverage options. That makes it a good choice for riders who want one helmet for trail centres, woodland loops, longer eMTB rides and everyday off-road riding.
The feature list is strong. Mips Air Node, a BOA fit system, dual-density EPS, a three-position visor, integrated sunglasses holder, Fidlock magnetic buckle and removable washable liner all make it feel like a proper premium trail helmet. These are the details that matter over time, especially if you ride with gloves, glasses or goggles.
Ventilation is also a big part of the appeal. eMTB riders still work hard on climbs, and a hot helmet can become irritating quickly. The Speedframe Pro gives a good balance of airflow and coverage, which makes it more versatile than heavier open-face helmets for mixed rides.
It is not the helmet for riders who want maximum rear and side coverage. For that, look at the Troy Lee Designs A3, Endura MT500 or Smith Payroll. But if you want a comfortable, modern, premium trail MTB helmet with a strong feature package, the Fox Speedframe Pro Mips is one of the best options here.
Pros
Strong premium feature package
BOA fit and Fidlock buckle
Good ventilation for trail and eMTB use
Cons
Not as deep as high-coverage enduro-style helmets
Specifications
Type: Premium open-face trail MTB helmet
Rotational protection: Mips Air Node
Fit system: BOA fit system
Fastening: Fidlock magnetic buckle
Visor: Three-position adjustable visor
Best for: premium trail riding, eMTB loops and mixed UK off-road use
Smith Payroll Mips
£139.99 (RRP £185)
The Smith Payroll Mips is the helmet to consider if you like Smith’s fit and eyewear integration but want more coverage than the Pilot. It sits higher in the range and feels more appropriate for riders who are pushing harder on trail-centre descents, faster woodland routes or more technical eMTB rides.
Compared with the Pilot, the Payroll is more substantial. It has extended coverage, Mips protection and Smith’s usual focus on eyewear compatibility. That makes it a good match for riders who regularly swap between glasses and goggles, or who already use Smith eyewear and want a helmet that plays neatly with it.
It is not the cheapest Smith option, and it may be more helmet than casual riders need. If most of your riding is mellow, the Pilot is easier to justify. If you want a more aggressive open-face helmet without moving to a full-face, the Payroll makes more sense.
For eMTB riders, the Payroll’s appeal is confidence. It feels like a helmet designed for proper trail use rather than light off-road riding. That extra coverage can be useful if assistance has led you towards faster, longer or more technical rides.
It also fills a useful gap in this guide. The Pilot is the affordable Smith pick. The Payroll is the more serious Smith option for riders who want a higher-coverage, premium trail MTB helmet with strong glasses and goggle compatibility.
Pros
More coverage than the Smith Pilot
Strong Smith eyewear integration
Good choice for faster trail riding
Cons
More expensive than many riders need
Specifications
Type: Premium open-face trail MTB helmet
Rotational protection: Mips
Coverage: Extended trail coverage
Eyewear compatibility: Smith glasses and goggle integration
Visor: Adjustable visor
Best for: riders wanting a more serious Smith trail helmet
Canyon Deflectr
£159.99
The Canyon Deflectr is the most unusual trail MTB helmet in this guide, but it earns its place because it offers something genuinely different. Instead of following the normal trail helmet template, Canyon has built the Deflectr around its RLS impact technology and HighBar retention system.
The look takes some getting used to. The HighBar system is more structured than a normal helmet strap and immediately makes the Deflectr feel different when you first put it on. The surprise is how normal it feels once riding. In use, it quickly becomes one of those helmets that fades into the background, which is exactly what a good trail helmet should do.
For eMTB riders, the Deflectr makes sense because it gives a stronger safety-led story without becoming a full enduro helmet or full-face. It has an adjustable visor, secure sunglasses storage, goggle compatibility and good ventilation, making it practical for proper trail rides rather than simply interesting on paper.
It is not the cheapest helmet here, and the look will not be for everyone. Some riders will prefer the familiar feel of a Smith, Endura, Troy Lee, MET or Bluegrass helmet. But if you like the idea of newer helmet technology and want something that feels surprisingly natural once moving, the Deflectr is one of the most interesting trail helmets currently available.
It is also a strong option for riders who prioritise comfort. A helmet with unusual safety technology still has to be easy to wear, and that is where the Deflectr makes its case. It looks odd at first, but feels impressively normal on the trail.
Pros
Incredibly comfortable on the trail
Strong safety-led design with RLS technology
Well ventilated for trail and eMTB use
Cons
HighBar system takes some getting used to
Specifications
Type: Open-face trail MTB helmet
Rotational protection: Canyon RLS release layer system
Fit system: HighBar 1.5 with rear micro-adjustment dial
Ventilation: Large intake, top and exhaust vents
Visor: Adjustable visor
Best for: safety-focused riders wanting a different trail helmet
Endura MT500 Mips
£162 (RRP £180)
The Endura MT500 Mips is one of the most practical trail MTB helmets in this guide for UK riding. It has a serious safety package, useful trail features and the sort of normal, comfortable feel that matters more on real rides than any single specification.
The MT500 Mips combines Mips with a Koroyd core, giving it a more technical protection story than a basic EPS shell with a slip liner. It also has good trail coverage, an adjustable visor, eyewear storage and a clip-on accessory mount for a light or camera. Those details are useful for UK riders who deal with changing weather, winter evenings and mixed trail conditions.
The best thing about the MT500 Mips is how easy it is to wear. It feels secure without constantly reminding you it is there. That is important for eMTB riding because longer climbs and repeated descents can make small helmet problems more obvious. A pressure point that feels minor after ten minutes can become annoying after two hours.
The sizing is also a real advantage. Endura’s L-XL option goes up to 63cm, which will matter to riders who struggle with smaller helmet ranges. Not every mountain bike helmet brand caters well for larger heads, so this gives the MT500 Mips a useful point of difference.
It is not the lightest open-face helmet and it misses out on a Fidlock buckle, which feels like a shame given the rest of the feature set. Even so, it is one of the strongest practical choices here, especially for UK eMTB riders who want comfort, coverage and useful all-weather details.
Pros
Comfortable enough to forget you are wearing it
Generous L-XL sizing up to 63cm
Mips and Koroyd protection package
Cons
No Fidlock buckle despite the strong feature set
Specifications
Type: Open-face trail MTB helmet
Rotational protection: Mips with Koroyd core
Fit system: One-handed micro-adjust fit system integrated into the Mips layer
Ventilation: Large vents including top air intake zone
Visor: Removable adjustable visor
Best for: practical trail, all-weather riding and eMTB use
Specialized Ambush 3
£169
The Specialized Ambush 3 is the premium trail option for riders who want a modern, airy open-face helmet with a refined fit and practical details. It is less heavily styled than the Troy Lee Designs A3 and more conventional than the Canyon Deflectr, which will make it appealing to riders who want performance without anything too unusual.
The Ambush 3 uses Mips Air Node Pro, a BOA FS1 fit system, a Fidlock magnetic buckle, integrated eyewear storage and an adjustable breakaway visor. That is a strong feature package for a trail helmet, especially for riders who spend a lot of time climbing and want ventilation to remain a priority.
For eMTB riding, the Ambush 3 makes sense if you want a helmet that feels light, cool and premium rather than heavily protective. It is still a proper trail lid, but it does not have the same deep, wrapped character as some enduro-influenced open-face helmets. Riders who want maximum coverage may prefer the Endura MT500, Troy Lee Designs A3 or Canyon Deflectr. Riders who value airflow and comfort may prefer the Specialized.
It is also one of the better helmets here for riders who want premium details without moving into a full-face or convertible design. The Fidlock buckle is useful with gloves, the BOA system gives easy fit adjustment, and the eyewear storage is exactly the sort of detail that becomes useful on real rides.
If your trail riding involves longer loops, regular climbing and varied terrain rather than purely aggressive descending, the Ambush 3 is one of the best premium choices.
Pros
Excellent ventilation for long trail rides
Premium BOA fit and Fidlock buckle
Good eyewear storage and practical details
Cons
Less coverage-focused than deeper trail helmets
Specifications
Type: Premium open-face trail MTB helmet
Rotational protection: Mips Air Node Pro
Fit system: BOA FS1
Fastening: Fidlock magnetic buckle
Visor: Adjustable breakaway visor
Best for: long trail rides, eMTB loops and premium open-face comfort
Which trail MTB helmet should you buy?
For most riders, the best trail MTB helmet will be the one that fits properly and matches the riding you actually do. A helmet that is too hot, too bulky or the wrong shape will not be a good buy, even if it has an impressive feature list.
If you want the cheapest sensible option, choose the Rockrider EXPL 540 MIPS. If you want a premium-brand trail helmet under £100, choose the Smith Pilot Mips. If you want a simple everyday trail helmet, choose the MET Shelter Mips.
If you want the strongest all-round comfort and features, the Bluegrass Rogue Core Mips is a very safe choice. If you want the most practical UK trail and eMTB helmet, choose the Endura MT500 Mips. It has the right mix of comfort, coverage, Mips, Koroyd and useful all-weather details.
If you want a premium deep-coverage helmet, choose the Troy Lee Designs A3 Mips. It is secure, well ventilated and confidence-inspiring on rougher rides. If you want the most interesting safety-led design, choose the Canyon Deflectr. It looks unusual, but feels impressively normal once riding.
If you want premium ventilation and a refined fit, the Specialized Ambush 3 is a strong choice. If you like Smith but want more coverage than the Pilot, choose the Smith Payroll Mips. If you want a premium feature-heavy trail helmet with BOA, Mips and Fidlock, the Fox Speedframe Pro Mips is the obvious pick.
Riders who are now doing faster, steeper or more regular descending on an eMTB may want to step up to a high-coverage open-face helmet. Riders who are regularly riding bike parks, steep off-piste lines or high-consequence trails should consider whether a full-face helmet is the better choice.
The best trail MTB helmet is not always the most protective helmet you can buy. It is the helmet you will actually wear, that fits your head properly and gives the right balance of comfort, airflow and confidence for your riding.
Best trail MTB helmets FAQs
What is the best trail MTB helmet?
The best trail MTB helmet for most riders is a comfortable open-face helmet with good fit, ventilation and enough coverage for UK trail riding. The Smith Pilot Mips is a strong value choice, while the Endura MT500 Mips and Troy Lee Designs A3 Mips offer more coverage and trail confidence.
Do you need an eMTB-specific helmet?
No, you do not need an eMTB-specific helmet. Most riders should choose a proper trail MTB helmet that fits well and suits their riding. eMTB riders may benefit from more coverage, better ventilation and good goggle compatibility because assistance often means longer rides and more descending.
Should I wear a full-face helmet for trail MTB riding?
You should consider a full-face helmet if your riding includes steep descents, bike parks, enduro tracks, high speeds or repeated downhill laps. For everyday trail centres, bridleways and woodland loops, a good open-face trail helmet is usually more comfortable and practical.
Is Mips worth it on a trail MTB helmet?
Mips and similar rotational impact systems are worth considering because they are now common on many modern trail MTB helmets, including affordable options. Fit, coverage and correct helmet choice still matter most, but rotational impact protection is a useful feature.
What is the difference between a trail helmet and an enduro helmet?
A trail helmet is usually lighter, better ventilated and designed for general off-road riding. An enduro helmet normally has deeper coverage, a more protective feel and better goggle compatibility. Many eMTB riders sit between the two categories.
How should a trail MTB helmet fit?
A trail MTB helmet should sit level, cover the forehead and feel snug without pressure points. It should not rock when you move your head, and the straps should sit neatly around the ears with the buckle comfortable under the chin.
Is a cheap MTB helmet safe?
A cheap MTB helmet can still meet required safety standards, but it may not have the same comfort, ventilation, coverage or features as a more expensive helmet. Fit and certification matter more than brand status alone.
When should I replace a trail MTB helmet?
You should replace a trail MTB helmet after any significant crash or impact, even if the damage is not obvious. You should also replace it if the shell, straps, retention system or foam are damaged, or if it has become old, heavily used or poorly stored.