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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 Sunday, Mar 22
Order within 13 hours and 59 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: ‎TUSK


Valve Type: ‎Schrader


Material: ‎Butyl Rubber


Wheel Size: ‎29 Inches


Item Diameter: ‎21 Inches


Item Width: ‎80 Millimeters


Compatible Tire Width Minimum: ‎80 Millimeters


Valve Length: ‎4 Inches


Item Weight: ‎1.49 Kilograms


Manufacturer: ‎TUSK


Size: ‎29"


Compatible Tire Width Maximum: ‎80 Millimeters


Item Package Dimensions L x W x H: ‎12.71 x 8.31 x 4.69 inches


Package Weight: ‎1.59 Kilograms


Brand Name: ‎TUSK


Number of Items: ‎1


Part Number:


Date First Available: May 6, 2022


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Mar 22

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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  • Financing through Apple Pay
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

  • 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

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

  • Good quality
Sturdy quality and fast shipping
Reviewed in the United States on July 15, 2025 by Meagan harrington

  • Best offroad tube
The best bang tubes for the buck unless you want to go mousse
Reviewed in the United States on October 1, 2025 by Brett S

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

  • 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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