Overview
MICHELIN Bib Mousse M16S 90/100-21 Enduro Soft is a dedicated front mousse insert for off-road closed cell foam ring replaces the conventional inner tube between rim and tire, creating a puncture free setup with a consistent, low pressure feel tailored to technical enduro and rally use.
Key benefits
- Eliminates classic punctures and pinch flats by replacing the inflatable inner tube with a solid foam insert.
- Soft M16S specification provides a more compliant front end feel for grip and comfort on rocks, roots and slick surfaces.
- Optimized to enhance the performance of MICHELIN off road tires in terms of traction, precision and stability.
- Lighter than many reinforced inner tubes while maintaining constant support equivalent to approximately 0.9 bar or 13 psi.
- Designed for front off road use only, ideal for enduro, extreme enduro, rally stages and motocross special tests.
- Best performance when used together with MICHELIN Bib Mousse Gel during mounting to limit friction and heat and to maximize service life.
- Recommended by the manufacturer for off road competition use and not approved for public road riding.
Technical specifications
| Manufacturer | MICHELIN |
| Product line | Bib Mousse off road mousse insert |
| Model code | M16S Enduro Soft |
| Position | Front wheel |
| Nominal tire size | 90/100-21 enduro front tire |
| Additional tire sizes supported | 80/100-21 and 90/90-21 front off road tires where M16S mousse is recommended |
| Compatible rim diameter | 21 in front rims |
| Recommended rim width | Approximately 1.60 to 1.85 in |
| Recommended equivalent pressure | Around 0.9 bar, approximately 13 psi support level |
| Construction | Closed cell foam mousse ring insert replacing the inner tube |
| Intended terrain | Enduro, hard enduro, rally raid, motocross and other demanding off road conditions |
| Recommended tire families | MICHELIN Starcross 5 Soft and Medium in 80/100-21, Starcross 5 Soft, Medium and Hard in 90/100-21, Desert Race 90/90-21, Enduro Medium and Enduro Competition VI 90/100-21 |
| Road approval | For off road use only, not approved for use on public roads |
| Maximum recommended speed | Up to about 80 mph or 129 km per hour when used as specified with MICHELIN Bib Mousse |
| SKU | 879908 |
Compatibility with MICHELIN off road tire ranges
The M16S Enduro Soft mousse has been developed specifically to match the carcass stiffness and dimensions of selected MICHELIN off road front recommended combinations include competition focused products in enduro, rally and motocross use where a softer feel and increased grip are required.
- Starcross 5 Soft and Medium front in size 80/100-21.
- Starcross 5 Soft, Medium and Hard front in size 90/100-21.
- Desert Race front in size 90/90-21 for rally raid and desert racing.
- Enduro Medium and Enduro Competition VI front in size 90/100-21 for classic and special test enduro riding.
Technology and operating recommendations
Bib Mousse technology uses a shaped foam insert that occupies the air space inside the there is no air chamber, sharp impacts, thorns or rocks cannot cause a classic puncture, and the mousse continues to support the tire even after heavy insert is engineered to deliver a stable, low pressure feel suited to enduro style riding rather than the higher pressures of road use.
For optimum longevity, the manufacturer recommends fitting Bib Mousse only to MICHELIN off road tires, applying dedicated MICHELIN Bib Mousse Gel at every installation or removal, and avoiding prolonged running at high speed or at very high ambient temperatures which can shorten service above roughly 30 degrees Celsius and long term exposure above about 40 degrees Celsius should be use should normally occur within a limited time from manufacture, and continuous use is typically recommended within several months of first fitting, with real lifespan depending strongly on riding intensity and discipline.
Typical applications
- Enduro and extreme enduro events on rocky, rooty or heavily rutted tracks where puncture risk is high.
- Rally special stages in which reliability and consistent steering feedback are critical.
- Motocross and cross country racing on rough circuits where pinch flats can occur with tubes.
- Regular training in hard terrain for riders who want a soft, controlled front tire feel without checking air pressure.
