🚴♂️ Seal the deal, ditch the flats, and own every trail!
YunSCM’s 2-pack 20" inner tubes are designed for fat tire bikes (20x4.0-4.5 inches) featuring a 32mm Schrader valve and built-in self-sealing technology that automatically repairs small punctures within seconds. Made from durable butyl rubber, these tubes perform reliably even in cold weather (0 to -15°C) and offer hassle-free installation, backed by a 180-day quality guarantee.
| Bike type | Compatible with This Size Range of Bicycle Tires |
| Size | 20x4.0-4.5" |
| Material type | Butyl Rubber |
| Wheel size | 20 Inches |
| Batteries included? | No |
| Brand | YunSCM |
| Manufacturer | YunSCM |
| Item model number | 20x4.0/4.5 |
| Package Dimensions | 25.5 x 24.99 x 6.1 cm; 1.51 kg |
| ASIN | B08MQ4P879 |
A**
Just as expected
I love it
A**Y
Value for money
Well made heavy duty inner tubes, close inspection of seams and valve attachment show strong joints .I use them on 16x4 fat tyre e-trike and so far the pre installed anti puncture material has not been tested, but no noticeable balance issues with it.
M**O
Do the job as described
I can now say officially after my first puncture they work as described. Was out on a ride, could hear tyre going down so pulled out my battery powered portable air inflator (another handy tool) and re inflated to desired psi. Off I cycled, had another 10 miles to get home and the tyre stayed up all the way so it does work thank the Lord. Obviously once not riding the tyre went down again as it needed repairing but it got me home and that's a blessing. I'd recommend highly. 👌 this was for a 20x4.0 fat tyre bike.
A**D
Seller what you advertise
After replacing my tube with this new product I thought would last long without puncher or if I get puncher would self repair unfortunately after 7 months riding my bicycle I got puncher as to any tube I had to go to cyclist shop for the repair dnt bother to buy this tube the information been giving here untrue
J**S
Bike tube
Good
N**A
Good quality
There is definitely some liquid in it like slime
G**
Excellent quality
Good product excellent quality
A**M
Unbalanced feeling
I believe it’s caused by the sealant inside, the bike shakes a lot
Trustpilot
5 days ago
2 weeks ago
