Whether you’re tackling muddy trails or cruising gravel roads, the 90/90‑21 Off‑Road / Dual-Sport Tire delivers dependable grip and stability. This size is commonly found on off-road-oriented bikes like Honda CRF, KTM, Husqvarna, and WR models.
Key Features & Benefits:
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Size: 90 mm width, 90% aspect ratio, 21″ rim diameter
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Tread Pattern: Deep, widely spaced knobs for superior traction on soft and loose surfaces
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Application: Designed for front use, fits most adventure, enduro, and trail bikes
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Construction: Tube-type/tubeless options available; usually tubed in raw trail use
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Ride Performance: Excellent off-road braking and cornering grip with stable steering feedback
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User Setup Tips: A slightly narrower front tire (like 80/100-21) may ride more smoothly, but a 90/90 improves durability and float over sand and soft conditions Reddit+15Reddit+15Illinois Minuteman Project+15
🧭 Rider Insights
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Many riders use the Dunlop D606 rear / Pirelli MT21 front combo for mixed off-road/gravel conditions Reddit+6Reddit+6Reddit+6
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The MT21 front (90/90-21) is praised for stability on pavement and confidence on dirt, though heavier and slightly noisier on-road RedditReddit
⚠️ Fitment Advice
Check your motorcycle’s rim width and fork clearance before upgrading to 90/90-21—some bikes with tight fork spacing may require confirmation for fitment. On dual-sport setups, this size is typically well supported across ktm, honda, and Yamaha models.
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