Technology & Safety
Advice & Guides Advice: How to make sure your helmet fits correctly
You'd be surprised how many riders wear a helmet that's too big for them. Here's how to tell if a lid really fits you...
1 Feb 2022
MT Thunder 4 SV - Rainforest Gloss Orange
Full face polymer helmet with Pinlock® Max Vision visor and Emergency Quick Release System
DetailsRRP
£159.99
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Verified Customer Reviews for MT Thunder 4 SV
Fits perfectly
22 Mar 2026 by Shaun
I like this crash helmet as it fits perfectly and I like the internal sun visor
Style: Matt Grey
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Value for money
11 Mar 2026 by Chris H
After searching for a good helmet for a decent price I stumbled across this helmet. It looks and feels great, surprisingly light and the comments have always been positive. It is a snug fit but not uncomfortable. I went with my normal size.
Style: Luminence Matt Black
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10/10 Helmet
02 Mar 2026 by Anonymous
Really comfy helmet, good price and looks amazing, needs a pin lock to not steam up but 99% of helmets do.
Style: Yamanaka Matt Fluo / Red
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Stylish and secure
02 Feb 2026 by Ian P
Great looking helmet, great fit and comfortable.
Style: Luminence Matt Red
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Good fit
23 Jan 2026 by Ken
Good fit well made. Does not come with pinlock.
Style: Matt Grey
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Excellent quality build
28 Dec 2025 by Justin F
I bought this as a Christmas present for a young biker and it didn't disappoint! Excellent lid that fitted true to size and with room for his intercom system. The lad commented on how light it was too. Well packaged, safe and secure and arrived next day. Cracking service from Sportsbikeshop as always 5*
Style: Luminence Matt Red
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Great Helmet at an even better price
21 Nov 2025 by Gav
Love this Helmet! I was shopping around for a bright design for visibility during winter and night riding, and this has glowing sections so fits the bill. Fitted perfect, good considering I ordered online without a trial fit. Very comfortable to wear, has space for Bluetooth earpieces and cutouts in the padding for glasses arms. Only downside is the visor has a tendency to steam up really easily, so I recommended buying the Pinlock as well (MTV28B) which gets around this issue.
Style: Yamanaka Matt Fluo / Red
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Fits like a glove
20 Sep 2025 by Anonymous
Very comfortable to put on, no pressure or distractions to put you off.
Style: Luminence Matt Red
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Nice and quiet helmet
04 Sep 2025 by Kevin
Very comfortable helmet, cancels a lot of outside noise,
Style: Matt Grey
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Perfect product
23 Aug 2025 by Jim W
We bought our new helmets from sportsbikeshop
In Leeds the staff are so friendly professional and what makes it even better they are all bikers.
We love our new helmets they are just perfect for us comfortable light and quite on the road.
Style: Luminence Matt Red
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MT Thunder 4 SV - Rainforest Gloss Orange
11 Aug 2025 by Iceman
As an owner of many top end helmets I'd like to think I know what a good helmet should be, fit, finish, features, safety etc. This
MT Thunder 4 SV - Rainforest Gloss Orange helmet can quite easily hold its own against alot more expensive helmets its stunning. I'm a medium and it fits like a glove. The visor removal is quite simply the easiest and best on any helmet, it puts most other helmets to shame. Plus the drop down visor works very well. The helmet not only
meets but exceeds all the safety standards so there's no concerns with that. This helmet is prove you can get a quality lid for around £150.
Style: Rainforest Gloss Orange
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Description
One of the most affordable helmets of the market, with the highest safety homologation.
The MT Thunder 4 SV represents all the drive and technological evolution of MT helmets. The arrival of the ECE 22.06 certification shows the high level of MT's engineering team that, thanks to all the work during recent years, have made MT helmets a specialist in safety homologations.
The MT Thunder 4 SV sends a very clear message to the industry; now safety on a bike is within everyone's reach.
Product Specification
Variants
Pinlock® Inserts
Manufacturer
MT Thunder 4 SV - Rainforest Gloss Orange
- HIRP (High Impact Resistant Polymer) shell composed of a combination of polymers that offer excellent impact performance
- Extended sun visor for total field of vision protection
- High-quality, Pinlock® Max Vision visor for better definition and high impact resistance
- Fogoff® Full Vision with extra antifogging and photochromic system
- Quick visor swap system
- Extended vision area for safety and a better riding experience
- Visor lock system prevents the visor from opening unintentionally
- Reduced aero drag design for less air resistance
- Air flow channel system for less air resistance, reduced temperature and greater ventilation
- Micrometric double toothed closure keeps helmet secure
- 3-point protector system safety base trim to prevent abrasion, protecting the helmet and improving hygiene
- Emergency quick release system
- Detachable inner padding for easy cleaning
- Universal intercom cage for optional intercom system
- Reflective fabric inserts for improved rider visibility
- 2 shell sizes
- ECE 22.06 approved
One of the most affordable helmets of the market, with the highest safety homologation.
The MT Thunder 4 SV represents all the drive and technological evolution of MT helmets. The arrival of the ECE 22.06 certification shows the high level of MT's engineering team that, thanks to all the work during recent years, have made MT helmets a specialist in safety homologations.
The MT Thunder 4 SV sends a very clear message to the industry; now safety on a bike is within everyone's reach.
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