YUNSCM 2-PCS 20x4 Heavy Duty Fat Tire Tubes Schrader Valve Premium Butyl Rubber 20 Bike Tubes Compatible with 20x3.5/4.0 89/102-406 E-Bike/Mountain Bike/Street Bike Bicycle Tire Tubes

- 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.

Great product, would definitely buy again.

They're thick heavy duty with great grip. I can lean into a curve, big time. Thank you. I will be buying them again

Had to replace tube on ebike. These seem decent. Only rode about 20 miles so far on it. Regardless of tube I'm thinking of putting the puncture proof insert inside of my rear tire that goes in between tire and tube.

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.

I've been a long-time buyer from YUNACM. I recently ordered some tubes for my bike, but they were defective. When I reached out about it, they told me to send my address and assured me they'd send me new ones. They did, and they arrived two days before the delivery date! I'm super excited and I highly recommend this seller.

Pretty beefy, get some flatout quickstrike off road formula if you have 20x4 or higher wheels 20 to 23 psi and you will ride pretty good.

Everything worked great, it came one day later , but that was fine with me.

No issues, inflated fine. Stays inflated. Doesn’t leak. Ideal!

Entrega muy rápida y buen producto

Arrivati puntuali come sempre. Ottimi!

Bonne qualité à première vu

Jag har inte provat det nu men vid sommar.