Michelin M22 Bib Mousse 100/90-19 Rear Off-road Insert
Michelin M22 Bib Mousse 100/90-19 is a rear off-road foam insert designed as a lighter alternative to ultra heavy duty inner tubes for 19-inch motocross, enduro, cross-country and rally delivers a consistent feel equivalent to approximately 0.9 bar (13 psi) while virtually eliminating punctures and pinch flats when used with compatible Michelin off-road competition tires.
Key features
- Lighter than a comparable ultra heavy duty inner tube for improved handling and reduced unsprung mass.
- Approximate inflation-pressure equivalence of 0.9 bar (13 psi) for enhanced traction and comfort on rough terrain.
- Eliminates punctures and pinch flats in off-road use by replacing the conventional tube with a continuous foam insert.
- Developed specifically for cross-country, rally, enduro and motocross competition environments.
- Rear fitment for 19-inch rims with 100/90-19 off-road tires.
- Engineered to work in conjunction with selected Michelin off-road competition tire ranges.
- Optimized for use with Michelin Bib Mousse fitting gel to control internal friction and heat for longer service life.
These characteristics make the Bib Mousse a dedicated competition component rather than a conventional inner tube.
Technical data
| Parameter | Specification |
| Manufacturer | Michelin |
| Product type | Bib Mousse off-road foam insert (rear) |
| Model designation | M22 |
| SKU / reference | 057334 |
| Nominal tire size compatibility | 100/90-19 rear off-road motorcycle tires |
| Rim diameter | 19 inch (rear wheel) |
| Recommended rim width | 2.15"–2.50" |
| Approximate pressure equivalence | ~0.9 bar / 13 psi (feel, not an actual internal air pressure) |
| Intended terrain / usage | Motocross, enduro, cross-country, rally off-road competition |
| Tube comparison | Lighter, puncture-proof alternative to ultra heavy duty inner tubes |
The M22 is sized to fit 100/90-19 rear tires on rims with 2.15–2.50 inch width, aligning with common 19-inch motocross and enduro wheel sizes.
Recommended Michelin tire ranges
According to official fitment charts, the M22 Bib Mousse matches selected 100/90-19 rear sizes in the Michelin StarCross 5 and StarCross 6 motocross families, as well as the Tracker off-road range in the same size.
| Michelin tire line | Tire size | Typical use |
| StarCross 5 (Sand / Soft / Medium) | 100/90-19 rear | Motocross and training, soft to medium terrain |
| StarCross 6 (selected patterns) | 100/90-19 rear | Modern motocross applications from sand and mud to medium terrain |
| Tracker | 100/90-19 rear | Versatile off-road / trail use where puncture resistance is critical |
Typical off-road applications
- Motocross tracks with repeated jumps, braking bumps and ruts where pinch flats are common.
- Enduro and sprint enduro stages with rocks, roots and sharp-edge impacts.
- Cross-country and rally special stages requiring consistent grip over long distances.
- Training and competition scenarios where maintaining mobility despite impacts and obstacles is essential.
- Situations where a low, traction-oriented pressure feel is desired without the risk of tube puncture.
Service life and installation notes
Michelin indicates a typical service life of up to around six months from the first installation of the Bib Mousse, with faster wear expected under intensive, high-speed or high-temperature optimum durability and performance, the insert is intended to be installed using dedicated Michelin Bib Mousse fitting gel, which helps distribute lubrication, limit internal friction and control heat build-up inside the tire.
