Heavy Duty 20x4 E-Bike Tubes 20 x 4.0 Bike Inner Tubes Compatible with 20x3.5/4.0 Ebikes & Electric Bicycle & Mountain Bikes & Street Bicycle Fat Tire Tubes Schrader Valve 2-PCS
Condition: New
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Availability:
In Stock.
Arrives
Monday, Aug 17
Features
- Designed for E-bike 20x4.0 Heavy Duty inner tubes: 20x3.5/4.0 (89/102-406) Schrader Valve heavy-duty fat inner tube, we design the most suitable thick inner tube for e-bike according to the demand, which can easily meet the demand of 20"x4.0". In fact, its width can be extended to 5.0"+, in order to ensure quality, we conservatively used in the 3.5/4.0 range to ensure its life and air tightness, and reduce the frequency of wear and replacement.
- Application Scenarios: This heavy duty ebike inner tube is compatible with the corresponding models of mountain bikes, road bikes, cruiser bikes, e bikes, electric mountain bikes; At the same time, the increase in thickness can meet the needs of the longer driving range and load of the prevailing electric bicycles.
- HEAVY DUTY- Ultra Durable: Our heavy duty inner tubes have higher puncture resistance than ordinary inner tubes, and the thicker 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.
- Excellent shock absorption ability: The heavy, strong, highly durable butyl rubber made from these inner tubes is a perfect shock absorber to reduce vibration and eliminate the shock caused by bumps and rough surfaces on the road or pavement. Heavy Duty butyl rubber for maximum ride comfort - upgrade your ride experience.
- HEAVY DUTY - Air Tightness: Using high elasticity and high quality butyl rubber and EPDM rubber, the thickness is increased by 40%, and the air tightness of the inner tube is increased by 200% than that of the ordinary butyl inner tube; After inflation, the tire can maintain a higher air pressure for 6-9 months, greatly reducing the inflation frequency. Good air tightness helps keep tire pressure stable, thus improving driving safety.
- Installation: 20''x3.5''/4.0" bicycle heavy duty replacement inner tube for easy installation and removal. Check the valve position to ensure that the installation direction is correct.
- Tip: Before installing the inner tube, please put the inner tube into the water for inspection, if there are bubbles, it means that it has been damaged, you can contact us. Check the valve position to ensure that the installation direction is correct. Note: The inflatable inner tube should avoid puncture by sharp objects.
Brand: YunSCM
Valve Type: Schrader
Material: Butyl Rubber
Wheel Size: 20 inches
Item Diameter: 4 inches
Brand Name: YunSCM
UPC: 750139075553
Item Weight: 0.97 kg
Manufacturer: YunSCM20210306120
Included Components: 2 pcs 20x3.5/4.0 AV32mm Schrader Valve heavy duty ebike tubes
Item Type Name: 20x3.5/4.0
Model Number: GGG120
Manufacturer Part Number: YunSCM20210306120
Warranty Description: 180 days
Valve Type: Schrader
Wheel Size: 20 inches
Compatible Tire Width Minimum: 3.5 inches
Compatible Tire Width Maximum: 4 inches
Bike Type: Compatible with This Size Range of Bicycle Tyres
Item Diameter: 4 inches
Item Width: 4 inches
Valve Length: 1.57 inches
Size: 20x3.5/4.0
Material Type: Butyl Rubber
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Aug 17
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
I've bought these before and they're solid. Durable, easy to install, and they hold air great. No issues. Happy with them. Recommended!
Reviewed in the United States on July 12, 2026 by Tedyu
These were advertised as "heavy duty" 20x4 inner tubes. When I opened the box and took one out, I was very pleased at its heft and weight. It was much weightier than the tubes that the bike came with (that kept getting punctures!) I had had several flats in the front and finally one on the rear that I could not repair (it was pretty big!) So, in searching for hefty tubes, I found at least one other brand at a higher price point and read a few of the reviews. I went back to the "Amazon Choice" that had come up earlier and am glad I made that choice! They fit fine and were easy enough to install. I mean to say, it's changing a tube on a bike, something that I had done many times when I was young! I was pretty worried about these, if they would hold up, if they were heavy, heavy duty enough for the type of riding I do! Well, so far, I've put about twenty miles on them over the same graveled and muddy road surfaces that blew out the first ones after about a mile or two. No punctures to report. Well, not yet anyways. Only time and continued riding around the graveled and muddy trails will tell on that! I'm glad I got them is the bottom line. They fit fine, seem to be heavy duty enough, and were easy enough to install.
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Reviewed in the United States on March 1, 2025 by Uncle Al 54
These are the best intertubes for ebikes. Bikes. I bought tons of tires. Researched and couldnt tell which is the best and ride my ebike 70 miles a day. These are thick rubber. The seams dont pop little holes like others. Leave this review as it might help someone see 👀 These are a great brand. Thick. Fairly cheap packaged well. Came fast. I will be buying more. I researched the best brands but still couldn't find the right thick tires that aren't super expensive. And these are it. Schrader valves are the best I have read. And these suckers are durable. I spent almost 100 dollars on tubes. To finally find a good brand. And already bought more. These are great interubes for ebikes!! Bikes!! Recommend and thought I would leave a review as I spent 100 dollars on cheap tubes that the seams Crack and cheap rubber. These are the way to go!! All the way!
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Reviewed in the United States on July 21, 2026 by Amazon Customer
Good quality
Reviewed in the United States on July 27, 2026 by Rick Santiago
I am very pleased with these tires. We have used them for our E bike bikes for the kids. They seem to hold Air very well. They are heavy duty and not a cheap material. The tire itself looks great. They were easy for my husband to install and are used for both on and off-road driving. They’re very versatile for use. The two is lightweight, but the material is thicker.
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Reviewed in the United States on May 28, 2026 by Amazon Customer
Did what it was supposed to do. Nice thick inner tube, wasn’t flimsy like the stick one I had and you can tell this one is of great quality. Very pleased with this purchase.
Reviewed in the United States on July 14, 2026 by jeremy dozier
holing up well on my ebike. regularly loaded to 350# and so far im a few hundred miles in on the new tube. purchased for a ride1up Revv1. worked perfectly
Reviewed in the United States on June 25, 2026 by Kyle
I bought these YUNSCM 20x4 heavy duty e-bike tubes for my 20x4 Vipress fat tires, expecting solid performance. The set arrived quickly, well packaged, and the first tube installed perfectly. It’s holding air, riding smooth, and feels durable. The second tube, however, failed within 24 hours. Installation went fine, and it initially held air. The next morning, the front tire was completely flat. After removal, I found the leak at the base of the valve stem — the fused area where the stem joins the tube body. This is a high-stress spot, and in my case, the bonding failed. I had already added 8 oz of Slime sealant, which is great for punctures but rarely works on valve stem area leaks. Sure enough, the sealant oozed out at the stem area without sealing the leak. The tube was unusable, and I lost the sealant, which can’t be recovered. That’s not just a bad tube — that’s wasted time and money. This was clearly a manufacturing defect, not normal wear. The valve stem joint needs precise bonding, and it seems quality control missed this one. Since the other tube works perfectly, I suspect it was a one-off defect, but it still shows inconsistency in production. If you ride regularly, reliability matters. A failed tube means either canceling plans or scrambling for a replacement. It’s frustrating when you think your bike is ready, only to find it flat the next morning. For delivery riders like me, it’s more than an inconvenience — it’s lost work. Tips for buyers: Inspect the stem joint before installing. Inflate slightly and let it sit for a few hours before mounting. Wait to add sealant until you know the tube is sound — it’s too expensive to waste. Verdict: 3 stars. One tube is excellent, the other failed almost immediately. If both had been perfect, this would be a 5-star review. If both failed, it would be 1 star. The inconsistency makes these a gamble. When they work, they’re solid, thick, and ride well. But until quality control improves, you’re taking a chance on whether you get two good tubes or one that leaks at the stem and ruins your sealant.
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Reviewed in the United States on August 11, 2025 by Mudd