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 - Luminence Matt Red
Full face, sport-touring helmet with Pinlock® Max Vision visor, retractable sun visor and airflow channel system
Details
RRP
£149.99
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Verified Customer Reviews for MT Thunder 4 SV
MT Thunder 4 SV - Rainforest Gloss Orange
11 August 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
Product Specification
Variants
Manufacturer
MT Thunder 4 SV - Luminence Matt Red
- Shell made of HIRP (High Impact Resistance Polymer), a material that combines the best qualities with respect to the safety-weight ratio
- Removable and washable, hypoallergenic fabric interior
- Emergency release system for fast and safe extraction in the event of an accident
- Shield lock prevents unintentional opening of the visor in the event of an impact
- Improved retractable sun visor that fully covers the entire viewing area
- MT-QVSS - MT's patented Quik Visor Swap System makes it easy to change visors in seconds, even with the helmet on
- Reflective fabric - light reflection system designed to be seen in the dark
- Bluetooth compatible, standard intercom cage designed for Universal Communications System intercoms
- Micrometric closure with double teeth retention system to ensure maximum safety
- Air flow channel system - highest possible cooling flow with the lowest possible drag and air resistance
- 3 point protector system - safety base that prevents rubbing, protecting the helmet and improving its hygiene
- Eco-concious - life of the unit can be extended with removable elements that are easily replaceable
- ECE 22.06 certified
- Visor: MT-V-28B
- Pinlock: DKS435
The Thunder 4 SV is MT Helmet's top offering in the sport-touring segment, known for its exceptional value for money. Designed for long distances, it provides superior ergonomics and a wide field of view. Its ventilation system, optimised through fluid dynamics studies, ensures efficient airflow.
The helmet features communication technology with a dedicated compartment for UCS intercom systems and integrated sun visor with maximum coverage. Additionally, it includes the MT-QVSS system - the safest and easiest on the market for quick visor removal. Committed to sustainability, it is designed for a long lifespan, minimising environmental impact.
The helmet features communication technology with a dedicated compartment for UCS intercom systems and integrated sun visor with maximum coverage. Additionally, it includes the MT-QVSS system - the safest and easiest on the market for quick visor removal. Committed to sustainability, it is designed for a long lifespan, minimising environmental impact.
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