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This listing includes a pair of 21‑inch front inner tubes designed as standard replacements for a wide range of off‑road, dual‑sport, and vintage motorcycles. Because tire manufacturers use different sizing systems, each tube in this pair is built to fit several common size designations, making them a versatile choice for multi‑bike garages or riders who want a spare on hand.
Both tubes are suitable for everyday riding, trail use, and long‑distance travel, offering reliable performance and compatibility across multiple inch, metric, and alpha size formats.
Size Compatibility:
- Inch Sizes: 3.00‑21, 2.75‑21
- Metric Sizes: 90/90‑21, 80/100‑21, 90/100‑21
- Alpha Sizes: MH90‑21, MJ90‑21
Common Bike Fitments:
- Compatible with Honda: CRF250L, XR650L, XR250, CRF450RL
- Compatible with Suzuki: DRZ400S/SM, DR650, RM‑Z series
- Compatible with Yamaha: TTR230, YZ250F, WR450F, Tenere 700
- Compatible with Kawasaki: KLR650, KLX300, KX250
- Compatible with Chinese Brands: CSC TT250, Hawk 250, TaoTao, Apollo (21‑inch front models)
Size Reference:
- 3.00‑21: 90/90‑21 (Metric), MJ90‑21 (Alpha)
- 2.75‑21: 80/100‑21 (Metric), MH90‑21 (Alpha)
- MSRP: $24.95
- You Save: $5.00 (20%)
- Brand: Pirate Mfg
- Size: 3.00-21
- Color: Black
- Condition: New
- SKU: HR0361
- Country of Manufacture: CN
- Amazon Shipping Template: Freeship48-Large







