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2-PCS 20x3 Self-Sealing Fat Bike Tubes 20 x 3.0 AV32mm (76/89-406) Super Automatic Repair, Puncture Resistant Compatible with 20x3.0/3.5 E-Bike Bicycle Tire Tubes Schrader Valve

  • Based on 332 reviews
Condition: New
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Availability: In Stock.
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Arrives Sunday, Aug 9
Order within 23 hours and 3 minutes
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Features

  • SIZE: 32mm Schrader Valve. Fits all 20"x3.0/3.5 fat bike tire tubes Installation Precautions; Please check the side of your tire for the tire size your bike uses
  • Easy To USE: The Self Sealing Bike Inner Tube is a self-repair for some small holes or very fine cracks.For example,after a long time, some places will leak air quietly, accidentally hit nails and other problems, which are easy to repair.It is worth noting that our self-repairing inner tube can be used within the normal temperature environment and cold days -15 C, and it is more conducive to travel in cold weather
  • Safe Bike Tubes: Pre-installed with Sealant to provide maximum puncture protection and prevent flat tires on your bike.The puncture repair fluid circulates through the inner tube, automatically sealing the punctures.After testing, the leak can be repaired within 5~8 seconds under normal conditions.
  • Universal fit for Mountain, Road, BMX, Electric, and City bikes: Designed specifically for 20-inch wheels, this tube is the perfect spare or upgrade for junior mountain bikes (MTB), e bikes, BMX freestyle, city commuters, and folding bikes. Whether tackling rugged trails or smooth roads, it delivers reliable performance across all riding styles.
  • Ultra Durable: Our inner tubes have higher puncture resistance , and the body can withstand more friction and wear, thus extending the service life of the tube, reducing replacement frequency and maintenance costs. And in long-term use.
  • Please note: Because the Self Sealing fluid is flowing, in order to prevent the liquid from flowing out during operation, please do not concentrate the center of gravity or the liquid near the air nozzle when pumping up
  • Installation: 20"x3.0"/3.5" fat bicycle replacement inner tube for easy installation and removal. Check the valve position to ensure that the installation direction is correct

Brand: YunSCM


Valve Type: Schrader


Material: Butyl Rubber


Wheel Size: 20 inches


Item Diameter: 20 inches


Brand Name: YunSCM


UPC: 716852452255


Item Weight: 1.34 kg


Manufacturer: YunSCM


Included Components: 2 pcs 20x3.0/3.5 AV32mm Schrader Valve bike tubes


Model Number: YunSCM040


Manufacturer Part Number: YunSCM040


Warranty Description: 180 days


Valve Type: Schrader


Wheel Size: 20 inches


Compatible Tire Width Minimum: 7.6 centimeters


Compatible Tire Width Maximum: 8.9 centimeters


Bike Type: Compatible with This Size Range of Bicycle Tires


Item Diameter: 20 inches


Item Width: 3 inches


Valve Length: 32 millimeters


Size: 20x3.0/3.5


Material Type: Butyl Rubber


Frequently asked questions

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

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Top Amazon Reviews


  • Reliable
Best bike tubes out there
Reviewed in the United States on July 12, 2026 by Clackstar

  • Great Quality and Dependable
I bought these inner tubes for my 20x3.0 bike tires, and they’ve been working great. The installation was simple, the tubes fit perfectly, and they inflated without any issues. After several rides, they have held air consistently with no noticeable leaks. The rubber feels durable, and they seem well made for everyday use. Overall, this is a great value for the price, and I would definitely purchase them again when I need replacements. ... show more
Reviewed in the United States on July 30, 2026 by Tani Acosta

  • Inner tubes
It arrived on time. Inner tube is pretty thick and was easy to install pretty cheap for two inner tubes.
Reviewed in the United States on July 25, 2026 by MrCleans125

  • Terrible buy, self sealing fail.
These tubes were awful. I'm notice the use of the past tense? Yeah. .h Both tubes have gotten holes, and forget any of that "self sealing"crap. First off, just installing the tube was a pain. They are filled with that green fix-a-flat goo. And it's basically just liquid glue. My rear tire was punctured today, no nail or anything was found. Just a tiny hole that was spraying this awful sticky green slime all over the place. I finally managed to switch out the damaged tube for the new one. Now my bike is covered in slime, it's gotten in my gears , my brakes and my tools. I air up the tire the correct psi and begin my journey home. I make it about 1 miles whrn my bike began to fishtail and I realized that my tire was flat again! So now I'm left with no other options but the attempt to patch this "self sealing" slime tube. IMO not worth the hassle, stick with the plain Jane regular bicycle tubes, these are not as advertised and worthless if what you need is efficiency. Wish I could get my money back or exchange for regular tubes. ... show more
Reviewed in the United States on April 8, 2025 by Nicholas Wall

  • EV bike tires
They did what they were supposed to do
Reviewed in the United States on April 30, 2026 by Iris B.

  • On tims
No problems at all
Reviewed in the United States on June 28, 2026 by Alfredo perez

  • Puncture proof is the best way to ride
This is the best inner tube on the market
Reviewed in the United States on June 11, 2026 by francine dorsey

  • Great product
Great product, fit perfectly. Have no issues.
Reviewed in the United States on May 2, 2026 by Robert Allard

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