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

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Availability: In Stock.
Fulfilled by Amazon

Arrives Saturday, May 9
Order within 17 hours and 29 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


Item Weight: 1.49 Kilograms


Manufacturer: TUSK


Model Number:


Manufacturer Part Number:


Material Type: Butyl Rubber


Valve Type: Schrader


Wheel Size: 29 Inches


Compatible Tire Width Minimum: 80 Millimeters


Compatible Tire Width Maximum: 80 Millimeters


Bike Type: Offroad


Item Diameter: 21 Inches


Item Width: 80 Millimeters


Valve Length: 4 Inches


Size: 29"


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, May 9

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.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Best tube on the market
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

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

  • UHD 4mm tube. It works
UHD Tube. It works.
Reviewed in the United States on January 20, 2026 by Clyde D. Causey

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

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

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

  • Thicker than a snicker
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

  • Very durable!
This was the best inner tube I’ve ever purchased. It was easy to install and is incredibly durable. I was racing my bike at the track and landed a jump wrong and popped the tire off the rim. I rode two more laps with the tire off the rim and when I went to look at it I found that the inner tube was still holding air. After putting the tire back on the inner tube continued to hold air. ... show more
Reviewed in the United States on August 12, 2024 by PDL98

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