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
Tuesday, May 26
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.
- 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.
- 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.
- 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.
- 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.
- 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 Kilograms
Manufacturer: YunSCM20210306120
Model Number: GGG120
Manufacturer Part Number: YunSCM20210306120
Warranty Description: 180 days
Item Type Name: 20x3.5/4.0
Included Components: 2 pcs 20x3.5/4.0 AV32mm Schrader Valve heavy duty ebike tubes
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:
Tuesday, May 26
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
- Compatibility - I used this to replace the tube in the Front Tire of my AddMotor 'HEROTRI M-365X'. I expect, it will fit the back tires equally well. - Durability - The tubes seem hefty & durable, maybe even more so than the original tube I replaced. I expect that the thick butyl rubber construction will make this replacement outlast the original. - Ease of Installation - Everything fit great & installed easily. The whole process took less than 30 minutes. This install was much easier than my previous experiences with my mountain bike & electric scooter. I had been a bit nervous before the installation due to the electric motor being located in the front wheel, but it was not an issue. Big thanks to AddMotor engineers for making the replacement quick and easy with an unpluggable powerline to the front motor. - Tools - 3/4" Wrench Tire Levers Zip Tie I used a 3/4" wrench to remove the wheel. I used a cheap pair of tire levers that I found in my garage to help remove & replace the tire. I'd suggest getting an inexpensive pair, or using a couple of flat head screwdrivers. Not a lot of force was required, but they defiantly made the job a lot easier. Also, I used a zip-tie to help secure the power cable after re-installation.
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Reviewed in the United States on November 29, 2023 by WillyB
Great innertube. Very heavy duty.
Reviewed in the United States on March 23, 2026 by SANDIEGO
Solid intertube still got a flat
Reviewed in the United States on April 25, 2026 by Raymond Mansell
Just installed the tube on my rad runner plus that is a 22-in rim it fits it inflated and we'll see how it rides . I see some people leaving bad reviews that have rad runners these tires are not made for the rat runner. I did have to use one of these tubes cuz I'm waiting for an order to come from rad power bikes. I first inflated it to 30 lb which was the recommended for the tube that comes with the bike. When I went down the street it simply blew the sidewalls off the tire and locked up my front wheel. I lowered the pressure to 10 I took a ride it was a little mushy. I put the pressure up the 20 lb and that seems to be the perfect fit so far I'll update.
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Reviewed in the United States on December 31, 2021 by Chuck friggen Noris
On the trail, this tube felt durable and dependable. I’ve dropped the tire pressure into a range that would usually pinch-flat thinner tubes on rocks or roots, these tubes handled it with no problem. Riding in snow and sand, the wheel stayed stable and predictable.
Reviewed in the United States on February 9, 2026 by Drew Durkee
These work as expected. No complaints They look too small for the tire when you first inflate them (just enough to get them to stay on the rims). But once you get the tire on, they fill the tire completely. Getting the tire on and off is not easy, but we managed using a thin, but strong piece of plastic as a tire iron to avoid scratching the paint on the wheel.
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Reviewed in the United States on July 28, 2025 by S. Johnson
They're thick heavy duty with great grip. I can lean into a curve, big time. Thank you. I will be buying them again
Reviewed in the United States on January 26, 2026 by Richard mcintyre
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