The Motobike Mas 90/100-16 kids motocross motorcycle mousse is a nitrile rubber foam tire insert for youth MX, mini dirt bikes & pit bike rear wheels. Eliminates flats. B2B wholesale from Tianjin, China.
| 1.1 Бар | Optimal speed performance |
|---|---|
| 0,8 бар | Best for deserts, grasslands, and gobi terrain |
| 0,5 бар | Optimal for forest trails |
| 0,3 бар | Extreme enduro mousse for technical off-road riding |
The Motobike Mas 90/100-16 kids motocross motorcycle mousse is a closed-cell nitrile rubber foam tire insert engineered for the rear wheels of youth motocross bikes, mini dirt bikes, and pit bikes with 16-inch rear rims. Designed specifically for junior racers, this compact mousse insert completely replaces the inner tube to eliminate pinch flats, reduce unsprung rotating mass, and deliver consistent traction that helps young riders develop their skills with confidence.
Available in soft, medium, and standard density formulations, the 90/100-16 mousse fits the most common rear tire size for competitive youth motocross classes (65cc-85cc) and pit bike racing. As a Tianjin, China-based B2B manufacturer, Motobike Mas offers OEM private labeling, custom hardness formulations, and direct factory wholesale pricing for dealers, distributors, and race teams worldwide.
| Размер | 90/100-16 |
| Fitment | 90/100-16 rear tires (youth MX, mini dirt bike, pit bike) |
| Материал | Closed-cell nitrile rubber foam |
| Density Options | Soft, Medium, Standard |
| Вес | Approx. 0.7-0.9 kg |
| Rotating Mass Reduction | Up to 40% vs. tube + heavy-duty rim lock |
| Effective Pressure Equivalent | 8-12 psi |
| Service Life | 200-500 racing miles typical |
| Country of Origin | Tianjin, China |
For young riders learning to jump, corner, and navigate rough terrain, pinch flats are a frequent frustration that cuts practice and race time short. The 90/100-16 kids mousse eliminates rear pinch flats entirely — no more DNFs from flat tires at the most critical moments of a youth moto. Parents and mechanics can send junior racers to the gate with total confidence.
On smaller-displacement youth bikes, every bit of power matters. By eliminating the inner tube and heavy rim lock, the 90/100-16 mousse reduces unsprung rotating mass at the rear wheel by up to 40%. The result is noticeably quicker acceleration out of corners, easier bike handling for smaller riders, and reduced strain on the suspension — helping young riders corner with greater confidence.
Unlike pneumatic tires where rear tire pressure changes with temperature and riding time, a mousse insert delivers identical traction and damping from the first practice lap to the last moto. This consistency is invaluable for developing riders — it removes the variable of changing tire feel and lets them focus on technique and line choice.
The 90/100-16 mousse allows effective pressures as low as 8 psi with zero risk of pinch flats. In loose conditions, wet tracks, and soft terrain typical of youth MX tracks, this translates directly to more rear-wheel traction and drive out of corners — helping young riders carry more speed.
Once installed, the kids mousse requires zero maintenance for the life of the tire. No air pressure checks before practice sessions, no valve stem inspections between motos, no gauges or pumps needed. For parents managing multiple kids at race events, this eliminates a significant pre-race task and reduces stress on race day.
Selecting the correct mousse hardness for youth bikes is especially important — the wrong density can overwhelm a lightweight bike or young rider.
| Density | Effective Pressure | Best Terrain | Rider Weight |
|---|---|---|---|
| Мягкий | 8-10 psi | Mud, sand, wet tracks, soft terrain | Under 35 kg |
| Средний | 9-11 psi | Mixed terrain, all-around youth MX | 35-50 kg |
| Standard | 10-12 psi | Hard-packed, rocky, high-speed tracks | Over 50 kg |
This 90/100-16 kids mousse insert fits all standard 90/100-16 rear tires — the most common rear wheel size for competitive youth motocross and pit bikes.
| Factor | Kids Mousse (90/100-16) | Inner Tube |
|---|---|---|
| Flat prevention | 100% — no flats possible | Frequent pinch flats on landings |
| Performance consistency | Identical lap after lap | Changes with temperature |
| Maintenance | Zero — install and forget | Check pressure before every ride |
| Rotating mass | Lower — easier for kids to maneuver | Higher |
| Installation | More difficult (adult assistance required) | Easier |
| Cost per season | Lower — no tube replacements from pinch flats | Multiple tube replacements typical |
| Confidence for young riders | Higher — no fear of flats | Can be disrupted by flat-related DNFs |
A 90/100-16 kids mousse insert typically lasts between 200 and 500 racing miles, depending on terrain, rider weight, riding speed, and lubrication during installation. Given the lighter rider weights and lower power outputs of youth bikes, these mousses often last longer than full-size equivalents.
Important: Never use petroleum-based lubricants on mousse inserts — they degrade nitrile rubber. Use only water-based mousse lubricant. Adult assistance is recommended for installation on youth bike wheels as the smaller rim diameter requires careful technique to avoid damaging the mousse.
Motobike Mas is a Tianjin, China-based manufacturer of mousse inserts for off-road motorcycle racing tires. We supply dealers, distributors, race teams, and aftermarket brands worldwide with factory-direct pricing and full customization.
| Factory Pricing | Direct wholesale — no middlemen |
| OEM / Private Label | Custom branding, packaging, and colors |
| Custom Formulations | Adjust density and material properties for youth-specific applications |
| MOQ | Contact for minimums |
| Shipping | Sea (FOB Tianjin), air freight, DDP available |
| Samples | Pre-production samples for evaluation |
The 90/100-16 rear tire size is standard on youth motocross bikes in the 65cc and 85cc classes, including KTM 65 SX, Kawasaki KX65/KX85, Yamaha YZ65/YZ85, Husqvarna TC 65/TC 85, Suzuki RM85, GasGas MC 65/MC 85, and many pit bikes with 16-inch rear rims.
The Honda CRF110F comes stock with a smaller rear tire size. However, many aftermarket performance builds convert to 16-inch rear rims, making the 90/100-16 mousse suitable for upgraded CRF110F pit bike race builds.
While the material and construction are the same, the 90/100-16 kids mousse is smaller, lighter, and uses density ranges optimized for lower rider weights and lower power outputs. The soft formulation is particularly important for youth applications, where an overly firm mousse can overwhelm a lightweight bike.
A mousse won’t increase engine power, but by reducing rotating mass at the rear wheel, it allows the bike to accelerate more quickly and handle more responsively. Many young riders notice an immediate improvement in cornering confidence and overall bike maneuverability.
Yes. B2B clients can request samples for evaluation before committing to volume orders. Contact our sales team to arrange sample shipments.
Typical lead time is 15-30 days for standard OEM production, depending on quantity and customization requirements.
