LS2 FF901 Advant X Liner
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- 14-day returns — in stock ships within 24h
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Genuine LS2 replacement interior for the FF901 Advant X, part 800901LNR01, available in every helmet size from XS to 3XL. Crown liner and cheek pads together, in the same specification as the original: laser-cut foam, hypoallergenic, breathable, fully removable and machine-washable.
This is the part that decides how long the helmet lasts you, and the part riders most often misdiagnose. Liner foam compresses under load and breaks down chemically from sweat and hair oils. As it does, the fit loosens: the helmet begins to move on the head, rocks under braking, and lets in noise that was not there before. The natural conclusion is that the helmet is finished. In fact the shell is untouched and the interior has simply reached the end of its service life — at a fraction of the cost of a new helmet.
Laser cutting is the detail worth understanding. A laser varies the cut depth continuously, so a cheek pad can be shaped rather than stamped — firm at the jaw line where it has to locate the helmet, relieved over the cheekbone and where spectacle arms run. A die-cut pad is uniform, and it feels it.
🔑 Order the size that matches your helmet, not your head. If the helmet is otherwise right but feels slightly loose at the cheeks, the cheek pads alone (part 806901CKP04) are the cheaper first step. The carbon Advant X uses liner 801901LNR01 instead.
Fits
- LS2 FF901 Advant X
- LS2 FF901 Advant X Carbon
Specification
- Part — complete replacement interior — crown liner and cheek pads
- Foam — laser-cut, varying density
- Properties — hypoallergenic, breathable, removable, machine-washable
- Carbon models — use part 801901LNR01 instead
- Sizes — XS to 3XL
- Part number — 800901LNR01
| Part | complete replacement interior — crown liner and cheek pads |
|---|---|
| Foam | laser-cut, varying density |
| Properties | hypoallergenic, breathable, removable, machine-washable |
| Carbon models | use part 801901LNR01 instead |
| Sizes | XS to 3XL |
| Part number | 800901LNR01 |
- LS2 FF901 Advant X
- LS2 FF901 Advant X Carbon
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// LS2
LS2 FF901 Advant X Liner

Tech specs
- Part
- complete replacement interior — crown liner and cheek pads
- Foam
- laser-cut, varying density
- Properties
- hypoallergenic, breathable, removable, machine-washable
- Carbon models
- use part 801901LNR01 instead
- Sizes
- XS to 3XL
- Part number
- 800901LNR01
- Worldwide shipping
- Genuine parts & verified quality
- 14-day returns — in stock ships within 24h
- Personal email support
// Support
Frequently asked questions
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