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It is the classic question when buying your first helmet: the cheapest approved one, or one step up? These two answer it perfectly.
Head to head
| Spec | LS2 FF800 Storm II | MT Thunder 4 SV |
|---|---|---|
| Overall score | 8.1 | 7.5 |
| Safety | 8.0 | 7.4 |
| Comfort | 7.8 | 7.2 |
| Quietness | 7.4 | 6.8 |
| Ventilation | 7.8 | 7.4 |
| Value | 9.0 | 9.0 |
| Weight | 1,400 g | 1,500 g |
| Approval | ECE 22.06 | ECE 22.06 and DOT |
| Shell sizes | — | 2 |
| Shell material | KPA thermoplastic | HIRP polycarbonate |
| Internal sun visor | Yes | Yes |
| Pinlock anti-fog | Ready (Max Vision) | Ready (Max Vision) |
| Sizes | — | XS to 3XL |
Highlighted in orange: the winner of each measurable spec. Manufacturer data.
What they share
- ECE 22.06 approval (the MT is also DOT).
- Internal sun visor.
- Visor ready for a Pinlock Max Vision insert.
Both cover the safety essentials.
What the LS2 gets you
- Around 100 g less: 1,400 g against 1,500 g.
- Less noise at road speeds.
- A more compact-feeling helmet.
What the MT gets you
- Price: the cheaper of the two.
- Sizes up to 3XL.
- Hypoallergenic lining, removable and washable.
The shell size detail
The MT comes in two shell sizes. If you wear an XS or S, the helmet looks bigger from the outside. Our full-face helmet guide explains why it matters.
Verdict
- City or scooter only, or a helmet for your pillion: MT Thunder 4 SV.
- Commuting plus weekend rides: LS2 Storm II. You feel the difference on every ride.
