Michelin M18 Bib Mousse 120/90-18 Enduro (763062)
The Michelin M18 Bib Mousse is a rear off-road foam insert that replaces the traditional inner tube in 120/90-18 enduro for rally, enduro, cross-country and motocross competition, it eliminates punctures and pinch flats while delivering a controlled, low-pressure feel for maximum in top-level racing with multiple Dakar Rally, Enduro and MX world titles, the Bib Mousse concept has become a benchmark for serious off-road riders.
Key features and benefits
- Puncture-free performance: Multi-cellular butyl-based foam insert takes the place of a conventional inner tube, so there is no air to lose and no risk of classic punctures or pinch flats.
- Optimised grip and control: Designed to simulate a tyre pressure of around 0.9 bar (13 psi), enhancing traction, comfort and feel on rocks, roots, sand and ruts.
- Race-proven technology: The Bib Mousse concept has been used to win numerous Dakar Rally stages and world championships in enduro and motocross, underlining its reliability in the harshest conditions.
- Lighter than UHD tubes: Lower weight compared to ultra heavy-duty inner tubes helps reduce unsprung mass and allows the suspension to work more effectively over sharp bumps and impacts.
- High durability with correct use: When installed with Michelin Bib Mousse Gel and paired with recommended Michelin off-road tyres, the M18 is engineered for robust performance and long service life in competition use.
- Rear-specific 18-inch application: Tuned specifically for 18-inch rear wheels and 120/90-18 enduro tyres, giving an accurate tyre profile and consistent contact patch.
Technical specifications
| Manufacturer | Michelin |
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| Product type | Off-road foam mousse insert (inner tube replacement) |
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| Model designation | Bib Mousse M18 |
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| SKU / Article number | 763062 |
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| Wheel position | Rear |
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| Recommended rim size | 18" rear rim |
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| Reference tyre size | 120/90-18 enduro / off-road |
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| Equivalent pressure (new) | Approx. 0.9 bar (13 psi) |
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| Construction | Multi-cellular butyl-based foam ring with smooth outer skin |
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| Primary use | Off-road competition (enduro, hard enduro, rally, cross-country, motocross) |
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| Road approval | Not approved for road use (off-road only) |
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Recommended tyre pairings
The Michelin M18 Bib Mousse is engineered to match the internal volume and carcass behaviour of specific Michelin rear off-road compatible tyre lines and sizes include:
- Michelin Enduro Medium – 120/90-18
- Michelin Tracker – 120/90-18
- Michelin StarCross 5 Soft – 100/100-18, 110/100-18
- Michelin StarCross 5 Medium – 100/100-18, 110/100-18
- Michelin StarCross 6 Medium Soft – 110/100-18, 120/90-18
- Michelin StarCross 6 Medium Hard – 110/100-18, 120/90-18
- Michelin AC10 – 100/100-18, 110/100-18
Compatibility is determined by tyre size and construction; the mousse is designed specifically for the Michelin off-road tyres listed in official fitment documentation.
Typical use cases
- Enduro and hard enduro competition on technical singletrack, rocky climbs and root-infested trails where puncture risk is high.
- Rally and cross-country racing where consistent performance and the ability to finish stages without flats are critical.
- Motocross training and racing on rough, high-impact circuits that can easily damage standard inner tubes.
- Off-road adventure and extreme touring where maximum traction and reliability in challenging terrain are prioritised over road legality.
Installation and operating characteristics
- Supplied with dedicated Michelin Bib Mousse Gel to lubricate the insert and reduce friction during mounting and use.
- Intended for use exclusively with compatible Michelin off-road competition tyres on 18-inch rear rims.
- Delivers its best performance at typical off-road competition speeds; not suitable for sustained high-speed road operation.
- Service life depends on riding intensity, temperature, terrain and maintenance; correct mounting and lubrication are essential for maximum durability.
