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 R - Windtunnel Matt Blue
HIRP shell helmet with removable interior padding, rear spoiler with diffuser, intercom compatible, integrated sun visor and quick visor swap system
DetailsRRP
£159.99
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Verified Customer Reviews for MT Thunder 4 R
MT Thunder 4 R 
31 Jul 2026 by Craig H
Had to wait three weeks as helmet was a brand new design. Sports bike uk kept me informed off delivery date and arrived on the date. Helmet looks ace with my bike great design and a 4 sharp rating. Can’t fault product supplied
Style: Relevant Gloss Grey / Green
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New MT Helmet
13 Jul 2026 by Peter S
Really impressed with the quality and fit of this product would definitely buy again .
Style: Pipen Gloss Pink / White
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Description
Product Specification
Variants
Pinlock Insert
Visors
Manufacturer
MT Thunder 4 R - Windtunnel Matt Blue
- HIRP (High Impact Resistance Polymer) shell construction
- Removable and washable, hypoallergenic fabric interior
- New visor lock for greater safety and riding stability
- Redesigned rear spoiler and diffuser for better aerodynamics and sportier look
- New inner lining for improved comfort and fit
- Incorporation of the latest MT micrometric retention system, combining improved safety with a more modern and premium look
- Air flow channel system newly refined design for enhanced efficiency with dual-button front intake for precise ventilation control
- Quick visor swap system; Mt's patented system makes it east to change the visor in 5 seconds, even with the helmet on
- Housing for intercom system headset (sold separately)
- Visor: MT-V-28C
- Pinlock® 70 included (DKS435)
- Two shell sizes (S and L)
- Seven EPS sizes (Small - XS,S,M / Large - L,XL,2XL,3XL)
- Integrated sunvisor for those sunny days
- ECE 22.06 certified
The Thunder 4 R SV is MT Helmets' 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 vision. Its ventilation system, optimised through fluid dynamics studies, ensures efficient airflow.
This new R model features upgrades such as a new visor lock button for greater safety and riding stability, redesigned rear spoiler and diffuser for better aerodynamics and a sportier look, new inner lining for improved comfort and fit, and the incorporation of the latest MT Retention System, combining improved safety with a more modern and premium look.
This new R model features upgrades such as a new visor lock button for greater safety and riding stability, redesigned rear spoiler and diffuser for better aerodynamics and a sportier look, new inner lining for improved comfort and fit, and the incorporation of the latest MT Retention System, combining improved safety with a more modern and premium look.
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