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🚴♂️ Seal the deal on every ride — never let a flat slow your momentum!
YunSCM’s 20-inch self-sealing fat bike inner tubes feature a 32mm Schrader valve and are engineered for 20"x4.0/4.5" tires. Pre-filled with advanced sealant, they automatically repair punctures within seconds, ensuring uninterrupted rides even in cold conditions down to -15°C. Crafted from durable butyl rubber, these tubes offer enhanced puncture resistance and longevity, making them an essential upgrade for fat bike enthusiasts seeking reliability and peace of mind on every journey.
| ASIN | B08MQ4P879 |
| Best Sellers Rank | 10,635 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 139 in Cycling Tubes |
| Bike Type | Compatible with This Size Range of Bicycle Tires |
| Brand | YunSCM |
| Brand Name | YunSCM |
| Compatible Tire Width Maximum | 45 Millimetres |
| Compatible Tire Width Minimum | 40 Millimetres |
| Country Of Origin | China |
| Customer Reviews | 4.2 out of 5 stars 2,135 Reviews |
| Item Diameter | 20 Inches |
| Item Weight | 1.46 Kilograms |
| Item Width | 4 Inches |
| Item diameter | 20 Inches |
| Item width | 4 Inches |
| Manufacturer | YunSCM |
| Manufacturer Part Number | YunSCM2020110402 |
| Material | Butyl Rubber |
| Material Type | Butyl Rubber |
| Model Number | 20x4.0/4.5 |
| Number of Items | 2 |
| Size | 20x4.0/4.5 |
| UPC | 750139075393 |
| Valve Length | 0.85 Inches |
| Valve Type | Schrader |
| Valve type | Schrader |
| Wheel Size | 20 Inches |
| Wheel size | 20 Inches |
J**M
Inner tubes
Just as described
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**E
Hopefully they don’t puncture as easily as the original ones. 🤞🤞🤞
Seem to be really good but only just fitted so can’t comment on longevity.
I**S
Perfect fit
Item fitted my ENGWE L20 perfectly . Fast delivery from Amazon
T**.
Self sealing fails to seal
I am disappointed with the performance of these inner tubes. Initial setup required replacing a defective valve that refused to inflate. Furthermore, after two months of riding, the self-sealing feature failed to seal a standard nail puncture. Given that less expensive tubes have lasted longer, I cannot recommend this product for durability or puncture protection or self sealing promis.
M**.
Ideal product
Excellent
S**L
👌👌👌
Good
I**L
Cycle tubes
As described no problems
T**Y
fuerte, buena qualidad
cumple todo
J**T
Guter Schlauch
Die Schläuche lassen sich gut einbringen und aufpumpen . Bis jetzt keine Probleme oder Platten gehabt.
J**U
Bien satisfait.
Caoutchouc épais et bonne résistance, je suis très satisfait de ces chambres à air.
K**A
Worth the money
Fit very well. Tools attached are very handy
A**A
El producto es lo buscado
Producto como se publicita, un poco caro, pero bien.
Trustpilot
5 days ago
3 weeks ago