{"id":642,"date":"2026-05-25T02:20:06","date_gmt":"2026-05-25T02:20:06","guid":{"rendered":"http:\/\/motobikemas.com\/product\/90-100-21-heavy-duty-motorcycle-mousse-rally-enduro-racing\/"},"modified":"2026-05-27T04:21:47","modified_gmt":"2026-05-27T04:21:47","slug":"90-100-21-schwerlast-motorrad-mousse-rallye-enduro-rennen","status":"publish","type":"product","link":"https:\/\/motobikemas.com\/de\/produkt\/90-100-21-schwerlast-motorrad-mousse-rallye-enduro-rennen\/","title":{"rendered":"90\/100-21 Hochleistungs-Motorradmousse f\u00fcr Rallye- und Enduro-Rennen"},"content":{"rendered":"<h2>Professional 90\/100-21 Heavy Duty Motorcycle Mousse for Rally &amp; Enduro Racing Front Wheels<\/h2>\n<p>The Motobike Mas 90\/100-21 heavy duty motorcycle mousse is a rugged closed-cell nitrile rubber foam tire insert engineered for the front wheels of rally racing, extreme enduro, and adventure motorcycles operating in the most demanding off-road conditions. With a 90 mm section width and 100% aspect ratio, the 90\/100-21 provides a taller sidewall profile compared to standard 90\/90-21 tires \u2014 delivering additional cushioning, rock deflection, and impact absorption for high-speed desert racing and multi-day rally events.<\/p>\n<p>This heavy duty front mousse insert completely replaces the inner tube to eliminate dangerous front pinch flats, reduce unsprung rotating mass, and deliver consistent steering precision across thousands of kilometers of demanding terrain. Available in Medium, Standard, and Heavy-Duty density formulations, the 90\/100-21 mousse is built specifically for rally and extreme enduro applications where reliability and durability are paramount.<\/p>\n<p>Als B2B-Hersteller mit Sitz in Tianjin, China, bietet Motobike Mas OEM-Eigenmarken, kundenspezifische H\u00e4rteformulierungen und direkte Gro\u00dfhandelspreise f\u00fcr H\u00e4ndler, Distributoren und Rennteams weltweit.<\/p>\n<hr \/>\n<h2>Technische Daten<\/h2>\n<table>\n<tbody>\n<tr>\n<td><strong>Gr\u00f6\u00dfe<\/strong><\/td>\n<td>90\/100-21<\/td>\n<\/tr>\n<tr>\n<td><strong>Ausstattung<\/strong><\/td>\n<td>90\/100-21 front tires (rally, enduro, adventure front wheel)<\/td>\n<\/tr>\n<tr>\n<td><strong>Material<\/strong><\/td>\n<td>Geschlossenzelliger Nitrilgummischaum<\/td>\n<\/tr>\n<tr>\n<td><strong>Dichte-Optionen<\/strong><\/td>\n<td>Medium, Standard, Heavy-Duty<\/td>\n<\/tr>\n<tr>\n<td><strong>Gewicht<\/strong><\/td>\n<td>Approx. 1.1-1.3 kg<\/td>\n<\/tr>\n<tr>\n<td><strong>Reduzierung der rotierenden Masse<\/strong><\/td>\n<td>Bis zu 40% vs. Schlauch + Schwerlast-Felgenschloss<\/td>\n<\/tr>\n<tr>\n<td><strong>Effektiver Druck \u00c4quivalent<\/strong><\/td>\n<td>8-12 psi<\/td>\n<\/tr>\n<tr>\n<td><strong>Nutzungsdauer<\/strong><\/td>\n<td>300-800 racing miles typical (rally endurance-rated)<\/td>\n<\/tr>\n<tr>\n<td><strong>Herkunftsland<\/strong><\/td>\n<td>Tianjin, China<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h2>Wichtigste Vorteile<\/h2>\n<h3>Complete Front Flat Prevention for Rally Events<\/h3>\n<p>In rally racing \u2014 where a single front flat can end a multi-day event \u2014 flat prevention is non-negotiable. The 90\/100-21 heavy duty mousse eliminates front pinch flats, puncture flats, and valve stem failures entirely. For Dakar rally competitors, cross-country endurance racers, and extreme enduro riders, this means the confidence to push through rock fields, whoop sections, and high-speed gravel without fear of front-end failure.<\/p>\n<h3>Enhanced Impact Absorption from Tall Profile<\/h3>\n<p>The 90\/100-21&#8217;s 100% aspect ratio provides a taller sidewall than standard 90\/90-21 front tires. This additional sidewall height acts as a secondary cushioning layer, absorbing square-edge impacts and reducing deflection off rocks and ruts. Combined with the foam mousse&#8217;s inherent damping, the 90\/100-21 setup delivers the most compliant front end available for extreme terrain.<\/p>\n<h3>Reduced Rotating Mass for High-Speed Stability<\/h3>\n<p>By eliminating the inner tube and heavy-duty rim lock, the 90\/100-21 mousse reduces unsprung rotating mass at the front wheel by up to 40%. At rally speeds exceeding 140 km\/h, this reduction minimizes gyroscopic effect, allowing quicker steering inputs and reducing rider fatigue during marathon special stages.<\/p>\n<h3>Consistent Performance Across Temperature Extremes<\/h3>\n<p>Rally racing subjects equipment to extreme temperature variation \u2014 from cold morning starts to afternoon heat, from high mountain passes to desert floors. Unlike pneumatic tires where pressure fluctuates dramatically with temperature, a mousse insert delivers identical damping and steering characteristics regardless of ambient conditions.<\/p>\n<h3>Zero Maintenance During Multi-Day Events<\/h3>\n<p>Once installed, the 90\/100-21 rally mousse requires zero maintenance for the life of the tire. No air pressure checks between special stages, no valve stem inspections at refueling stops, no gauges or pumps in the tool kit. For rally teams and endurance riders, this eliminates a significant logistical concern and reduces service time between stages.<\/p>\n<hr \/>\n<h2>Leitfaden f\u00fcr H\u00e4rteoptionen<\/h2>\n<p>Rally and extreme enduro applications demand careful density selection. The 90\/100-21 is offered with a Heavy-Duty option optimized for the extreme loads of high-speed desert racing.<\/p>\n<table>\n<tbody>\n<tr>\n<th>Dichte<\/th>\n<th>Wirksamer Druck<\/th>\n<th>Bestes Terrain<\/th>\n<th>Gewicht des Fahrers<\/th>\n<\/tr>\n<tr>\n<td><strong>Mittel<\/strong><\/td>\n<td>8-10 psi<\/td>\n<td>Technical enduro, muddy rally, mixed terrain<\/td>\n<td>Unter 75 kg<\/td>\n<\/tr>\n<tr>\n<td><strong>Standard<\/strong><\/td>\n<td>9-11 psi<\/td>\n<td>All-around rally, cross-country, desert<\/td>\n<td>75-95 kg<\/td>\n<\/tr>\n<tr>\n<td><strong>Heavy-Duty<\/strong><\/td>\n<td>10-12 psi<\/td>\n<td>High-speed desert, rocky terrain, extended durability<\/td>\n<td>\u00dcber 90 kg<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Selection Guide for 90\/100-21 Rally Mousse<\/h3>\n<ul>\n<li><strong>Medium w\u00e4hlen<\/strong> for technical enduro and slower-speed rally sections where maximum front-end traction is needed. Ideal for lighter riders and extreme enduro applications.<\/li>\n<li><strong>Standard w\u00e4hlen<\/strong> as the default for all-around rally racing and cross-country events \u2014 the best balance of steering precision, bump absorption, and durability.<\/li>\n<li><strong>Choose Heavy-Duty<\/strong> for Dakar-style desert racing, high-speed gravel, and rocky terrain where maximum durability and impact resistance are required. The Heavy-Duty formulation uses a denser foam compound for extended service life under extreme loads.<\/li>\n<\/ul>\n<hr \/>\n<h2>Kompatibilit\u00e4t<\/h2>\n<p>This 90\/100-21 heavy duty mousse insert fits all standard 90\/100-21 front tires. The 90\/100-21 size is less common than standard 90\/90-21 or 80\/100-21 sizes but is used on select rally, adventure, and enduro motorcycles where a taller front profile is specified.<\/p>\n<h3>Rally Motorcycles<\/h3>\n<ul>\n<li>KTM 450 Rally Factory Replica<\/li>\n<li>Honda CRF450 Rally<\/li>\n<li>Husqvarna FR 450 Rally<\/li>\n<li>GasGas RC 450F Rally<\/li>\n<li>Hero 450 Rally<\/li>\n<li>Sherco 450 SEF Rally<\/li>\n<li>Custom rally builds based on enduro platforms<\/li>\n<\/ul>\n<h3>Enduro \/ Cross-Country<\/h3>\n<ul>\n<li>KTM 300 XC-W \/ 350 EXC-F \/ 500 EXC-F<\/li>\n<li>Husqvarna TE 300 \/ FE 350 \/ FE 501<\/li>\n<li>Beta RR 300 \/ RR 350 \/ RR 430 \/ RR 480<\/li>\n<li>Sherco SE 300 \/ SE 500 \/ SE 700<\/li>\n<li>GasGas EC 250 \/ EC 300<\/li>\n<\/ul>\n<h3>Adventure Bikes (21-inch Front)<\/h3>\n<ul>\n<li>Honda CRF450RL<\/li>\n<li>KTM 890 Adventure R (select tire fitments)<\/li>\n<li>Husqvarna Norden 901 (select tire fitments)<\/li>\n<\/ul>\n<hr \/>\n<h2>90\/100-21 vs. 90\/90-21 vs. 80\/100-21 \u2014 Front Mousse Comparison<\/h2>\n<table>\n<tbody>\n<tr>\n<th>Spezifikation<\/th>\n<th>90\/100-21<\/th>\n<th>90\/90-21<\/th>\n<th>80\/100-21<\/th>\n<\/tr>\n<tr>\n<td><strong>Breite des Abschnitts<\/strong><\/td>\n<td>90 mm<\/td>\n<td>90 mm<\/td>\n<td>80 mm<\/td>\n<\/tr>\n<tr>\n<td><strong>Bildseitenverh\u00e4ltnis<\/strong><\/td>\n<td>100%<\/td>\n<td>90%<\/td>\n<td>100%<\/td>\n<\/tr>\n<tr>\n<td><strong>Sidewall Height<\/strong><\/td>\n<td>Tallest \u2014 max cushioning<\/td>\n<td>Standard<\/td>\n<td>Tall<\/td>\n<\/tr>\n<tr>\n<td><strong>Lenkgef\u00fchl<\/strong><\/td>\n<td>Plush, absorbs impacts<\/td>\n<td>Balanced grip &amp; feel<\/td>\n<td>Quickest turn-in<\/td>\n<\/tr>\n<tr>\n<td><strong>Durability Rating<\/strong><\/td>\n<td>Heavy-duty \/ Rally rated<\/td>\n<td>Standard<\/td>\n<td>Standard<\/td>\n<\/tr>\n<tr>\n<td><strong>Am besten f\u00fcr<\/strong><\/td>\n<td>Rally, extreme enduro, desert<\/td>\n<td>All-around enduro, off-road<\/td>\n<td>Motocross, Supercross<\/td>\n<\/tr>\n<tr>\n<td><strong>Mousse Gewicht<\/strong><\/td>\n<td>1.1-1.3 kg<\/td>\n<td>1,0-1,2 kg<\/td>\n<td>0,9-1,1 kg<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h2>Maintenance and Service Life (Rally Rating)<\/h2>\n<h3>Erwartete Lebenserwartung<\/h3>\n<p>The 90\/100-21 heavy duty mousse is endurance-rated for 300-800 racing miles \u2014 significantly longer than standard mousse inserts due to its Heavy-Duty density option and optimized compound formulation for sustained high-speed operation.<\/p>\n<h3>Anzeichen, dass es ersetzt werden muss<\/h3>\n<ul>\n<li>Mousse f\u00fchlt sich sp\u00fcrbar weicher oder schwammiger an als neu<\/li>\n<li>Sichtbare Risse, fehlende Teile oder Verformungen<\/li>\n<li>Vague steering feel \u2014 reduced front-end confidence<\/li>\n<li>\u00dcberm\u00e4\u00dfige Hitze w\u00e4hrend der Anwendung (die Mousse sollte warm, nicht hei\u00df sein)<\/li>\n<li>After major rally events \u2014 pro-active replacement recommended<\/li>\n<\/ul>\n<h3>Tipps zur Lagerung<\/h3>\n<ul>\n<li>K\u00fchl, trocken und vor direkter Sonneneinstrahlung gesch\u00fctzt lagern<\/li>\n<li>Nicht zusammengedr\u00fcckt oder gefaltet lagern<\/li>\n<li>Von Ozonquellen fernhalten (Elektromotoren, Schwei\u00dfger\u00e4te)<\/li>\n<li>Haltbarkeit in versiegelter Verpackung: 3-5 Jahre<\/li>\n<\/ul>\n<hr \/>\n<h2>Einbauanleitung (Vorderrad)<\/h2>\n<ol>\n<li>Entfernen Sie den vorhandenen Vorderreifen und Schlauch vollst\u00e4ndig von der Felge<\/li>\n<li>Den Sitzbereich der 21-Zoll-Vorderradfelge gr\u00fcndlich reinigen<\/li>\n<li>Mousse-Schmiermittel gro\u00dfz\u00fcgig in der Karkasse des Vorderreifens auftragen<\/li>\n<li>Apply lubricant to the 90\/100-21 mousse insert itself<\/li>\n<li>Mousse in den Reifen einf\u00fchren und dabei gleichm\u00e4\u00dfig um die Karkasse herum arbeiten<\/li>\n<li>Montieren Sie einen Wulst mit Hilfe eines Reifeneisens auf die Felge.<\/li>\n<li>Den zweiten Wulst vorsichtig aufsetzen, damit die Mousse nicht eingeklemmt wird.<\/li>\n<li>Das Vorderrad einbauen und dabei sicherstellen, dass die Achse und die Abstandshalter richtig ausgerichtet sind.<\/li>\n<\/ol>\n<p><strong>Das ist wichtig:<\/strong> Never use petroleum-based lubricants on mousse inserts \u2014 they degrade nitrile rubber. Use only water-based mousse lubricant. For rally applications, ensure the mousse is fully seated before high-speed use \u2014 any imbalance will be felt through the handlebars at speed.<\/p>\n<hr \/>\n<h2>Rally Application Note<\/h2>\n<p>The 90\/100-21 heavy duty mousse is specifically formulated for the demands of rally racing and extreme endurance events. Unlike standard mousse inserts designed for motocross motos lasting 20-30 minutes, this mousse is engineered to maintain consistent performance over multi-hour special stages and multi-day events. The Heavy-Duty density option uses a specialized compound formulation that resists heat buildup during prolonged high-speed operation \u2014 the primary cause of mousse failure in rally applications.<\/p>\n<p>For Dakar Rally and similar events, Motobike Mas recommends the Heavy-Duty density option combined with fresh tire installation before the event start. Pre-running tires with mousse inserts for 50-100 km before the event allows the mousse to settle and conform to the tire casing for optimal performance.<\/p>\n<hr \/>\n<h2>B2B-Gro\u00dfhandel - Warum eine Partnerschaft mit Motobike Mas?<\/h2>\n<p>Motobike Mas ist ein in Tianjin, China, ans\u00e4ssiger Hersteller von Mousse-Eins\u00e4tzen f\u00fcr Off-Road-Motorrad-Rennreifen. Wir beliefern H\u00e4ndler, Distributoren, Rennteams und Aftermarket-Marken weltweit mit Direktpreisen und vollst\u00e4ndiger Anpassung.<\/p>\n<table>\n<tbody>\n<tr>\n<td><strong>Werkspreisgestaltung<\/strong><\/td>\n<td>Direkter Gro\u00dfhandel - keine Zwischenh\u00e4ndler<\/td>\n<\/tr>\n<tr>\n<td><strong>OEM \/ Eigenmarke<\/strong><\/td>\n<td>Individuelles Branding, Verpackung und Farben<\/td>\n<\/tr>\n<tr>\n<td><strong>Kundenspezifische Formulierungen<\/strong><\/td>\n<td>Adjust density and material properties including rally-specific endurance formulations<\/td>\n<\/tr>\n<tr>\n<td><strong>MOQ<\/strong><\/td>\n<td>Kontakt f\u00fcr Mindestbetr\u00e4ge<\/td>\n<\/tr>\n<tr>\n<td><strong>Versand<\/strong><\/td>\n<td>See (FOB Tianjin), Luftfracht, DDP verf\u00fcgbar<\/td>\n<\/tr>\n<tr>\n<td><strong>Proben<\/strong><\/td>\n<td>Vorproduktionsmuster zur Bewertung<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h2>Verwandte Produkte<\/h2>\n<ul>\n<li><a href=\"https:\/\/motobikemas.com\/de\/produkt\/80-100-21-profi-enduro-mousse-off-road-motorrad-vorderradreifen\/\">80\/100-21 Profi-Enduro-Mousse<\/a> \u2014 Classic MX front mousse for lighter steering feel<\/li>\n<li><a href=\"https:\/\/motobikemas.com\/de\/produkt\/90-90-21-off-road-motorrad-mousse-insert-enduro-vorderreifen\/\">90\/90-21 Mousse-Einsatz f\u00fcr Off-Road-Motorr\u00e4der<\/a> \u2014 Standard front mousse for enduro front wheels<\/li>\n<li><a href=\"https:\/\/motobikemas.com\/de\/produkt\/100-90-19-hochleistungs-motorradmousse-fur-motocross-reifen\/\">100\/90-19 Hochleistungs-Motorradmousse<\/a> - Hinterradmousse f\u00fcr MX und Enduro<\/li>\n<li><a href=\"https:\/\/motobikemas.com\/de\/produkt\/110-90-19-motocross-mousse-insert-mx-dirt-bike-racing\/\">110\/90-19 Motocross Mousse Einsatz<\/a> - Hinterradmousse f\u00fcr Full-Size MX-Bikes<\/li>\n<\/ul>\n<hr \/>\n<h2>H\u00e4ufig gestellte Fragen<\/h2>\n<h3>What is a 90\/100-21 tire size used for?<\/h3>\n<p>The 90\/100-21 is a less common front tire size used primarily on rally racing motorcycles and select extreme enduro applications. Its 100% aspect ratio provides a taller sidewall profile compared to standard 90\/90-21 tires, offering additional impact absorption and cushioning for high-speed desert terrain and rocky rally stages.<\/p>\n<h3>Is 90\/100-21 compatible with standard 21-inch rims?<\/h3>\n<p>Yes. The 90\/100-21 fits the same 21-inch rim diameter as standard 80\/100-21 and 90\/90-21 front tires. The difference is in the tire&#8217;s section width and aspect ratio, not the rim diameter.<\/p>\n<h3>Can I use a 90\/100-21 mousse in a 90\/90-21 tire?<\/h3>\n<p>No. Mousse inserts are size-specific. A 90\/100-21 mousse must be used with a 90\/100-21 tire. Using the wrong size mousse will result in improper fitment, reduced performance, and potential safety issues.<\/p>\n<h3>How is the Heavy-Duty formulation different from Standard?<\/h3>\n<p>The Heavy-Duty formulation uses a denser nitrile rubber foam compound with higher heat resistance, making it suitable for prolonged high-speed operation in desert and rally conditions. It offers extended service life at the cost of slightly firmer effective pressure (10-12 psi equivalent).<\/p>\n<h3>Bietet Motobike Mas vor Gro\u00dfbestellungen Muster an?<\/h3>\n<p>Ja. B2B-Kunden k\u00f6nnen Muster zur Bewertung anfordern, bevor sie sich zu einer Gro\u00dfbestellung verpflichten. Wenden Sie sich an unser Vertriebsteam, um den Versand von Mustern zu vereinbaren.<\/p>\n<h3>Wie lange ist die Vorlaufzeit f\u00fcr OEM-Bestellungen?<\/h3>\n<p>Die typische Vorlaufzeit f\u00fcr die Standard-OEM-Produktion betr\u00e4gt 15-30 Tage, abh\u00e4ngig von der Menge und den kundenspezifischen Anforderungen.<\/p>","protected":false},"excerpt":{"rendered":"<p>The Motobike Mas 90\/100-21 heavy duty motorcycle mousse is a nitrile rubber foam tire insert for rally &amp; enduro racing front wheels. Tall-profile, Heavy-Duty option available. Eliminates front pinch flats. B2B wholesale from Tianjin, China.<\/p>","protected":false},"featured_media":607,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[18],"product_tag":[148,163,158,150,151,152,165,154,155,149,153,162,161,156,164,157,166,45,159,160],"class_list":["post-642","product","type-product","status-publish","has-post-thumbnail","product_cat-motorcycle-mousse","product_tag-90-100-21","product_tag-adventure-front-tire","product_tag-baja-compatible","product_tag-dakar-preparation","product_tag-desert-racing","product_tag-endurance-mousse","product_tag-extreme-enduro-rally","product_tag-extreme-terrain","product_tag-heat-resistant-foam","product_tag-heavy-duty-insert","product_tag-high-speed-stability","product_tag-honda-crf450-rally","product_tag-ktm-450-rally","product_tag-long-distance","product_tag-marathon-stage","product_tag-multi-day-event","product_tag-navigation-road-book","product_tag-rally-mousse","product_tag-rally-raid","product_tag-special-stage","first","instock","shipping-taxable","product-type-simple"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.1 (Yoast SEO v25.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>90\/100-21 Heavy Duty Motorcycle Mousse for Rally &amp; Enduro Front Tires | Motobike Mas<\/title>\n<meta name=\"description\" content=\"B2B wholesale 90\/100-21 heavy duty motorcycle mousse for rally &amp; enduro racing front tires. 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