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Tusk Ultra Heavy Duty 4 mm Motorcycle Inner Tube 80/100×21 - Reinforced Butyl, TR‑4 Valve, Extreme Durability

  • Based on 100 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon

Arrives Wednesday, Oct 21
Order within 12 hours and 39 minutes
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Features

  • Reinforced 4 MM Wall Thickness - gives extra protection in harsh terrain
  • Premium Butyl Rubber Ronstruction - durable, flexible, and reliable
  • Centered TR4 Valve Stem - fits most rims and simplifies inflation
  • Precise 80/10021 Sizing - matches many dualsport front tire dimensions
  • Ideal Spare or Upgrade - built for extreme use and extended reliability

Description

For riders pushing the limits, the Tusk ultra heavy duty 4 mm motorcycle inner tube in size 80/100×21 is engineered for maximum resilience. Its thick, reinforced 4 mm wall helps resist punctures, pinch flats, and rock strikes that thinner tubes can’t survive. Built from quality butyl rubber, this tube offers excellent flexibility under load, dependable air retention, and resistance to aging or environmental stress. The centered TR‑4 valve stem provides compatibility with most rims and ease of inflation. Whether you’re replacing a damaged tube or carrying a backup for grueling trails, this tube is designed to handle the abuse. Use it wherever your riding demands extra peace of mind. Note: Confirm that your tire and rim dimensions match 80/100×21 before installation. Always check rim edges for sharpness or damage to protect your tube.

Brand: TUSK


Valve Type: Schrader


Material: Butyl Rubber


Wheel Size: 29 inches


Item Diameter: 21 inches


Brand Name: TUSK


Number of Items: 1


Item Weight: 3.4 pounds


Manufacturer: TUSK


Model Number:


Manufacturer Part Number:


Material Type: Butyl Rubber


Valve Type: Schrader


Wheel Size: 29 inches


Compatible Tire Width Minimum: 8 centimeters


Compatible Tire Width Maximum: 8 centimeters


Bike Type: Offroad


Item Diameter: 21 inches


Item Width: 8 centimeters


Valve Length: 4 inches


Size: 29"


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Oct 21

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews


  • Good upgrade
Size: 29"
I race cross country, its a good tube, not issues so far.
Reviewed in the United States on May 19, 2026 by Jason

  • Extremely heavy duty
Size: 29"
Exactly what I was looking for in a heavy duty tube.
Reviewed in the United States on February 4, 2026 by SL

  • Best tube on the market
Size: 29"
This tube is awesome. Thick and puncture resistant. No worry’s about pinching while installing.
Reviewed in the United States on November 30, 2025 by Bobby

  • Nice and Thick
Size: 29"
DID not ruin it on installation - holding air nicely.
Reviewed in the United States on May 18, 2025 by db-GIS

  • Thicker than a snicker
Size: 29"
Good tube for the price, obviously super thick, and stiff. Hard to put in, but I honestly think you could run without air and it would be fine still. But I'm not going to actually do that lol
Reviewed in the United States on October 27, 2025 by Greg

  • More weight than stock tube
Size: 29"
Super thick tube
Reviewed in the United States on September 20, 2025 by jason helms

  • Great tube
Size: 29"
Heavy duty tube works well.
Reviewed in the United States on September 7, 2025 by Mike

  • Dou ts how tough they are, I hope not have 2 flats a yr
Size: 29"
They're not as tough as I need them to be for my 72V 10000W emoto, this is the third one in three months ive had to replace because of tearing right next to the valve stem, time to try something different
Reviewed in the United States on July 11, 2026 by J.E.

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