---
product_id: 499709554
title: "2Pcs Self-Sealing 20 inch Bike Inner Tubes AV32"
brand: "yunscm"
price: "$73.75"
currency: USD
in_stock: true
reviews_count: 13
category: "Yun Scm"
url: https://www.desertcart.us/products/499709554-2pcs-self-sealing-20-inch-bike-inner-tubes-av32
store_origin: US
region: United States of America
---

# 20-inch diameter fits fat bike tires Operates reliably down to -15°C cold weather Self-sealing tech repairs punctures in 5-8 seconds 2Pcs Self-Sealing 20 inch Bike Inner Tubes AV32

**Brand:** yunscm
**Price:** $73.75
**Availability:** ✅ In Stock

## Summary

> 🚴‍♂️ Seal the deal on every ride — never let a flat slow your momentum!

## Quick Answers

- **What is this?** 2Pcs Self-Sealing 20 inch Bike Inner Tubes AV32 by yunscm
- **How much does it cost?** $73.75 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/499709554-2pcs-self-sealing-20-inch-bike-inner-tubes-av32)

## Best For

- yunscm enthusiasts

## Why This Product

- Trusted yunscm brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Cold-Weather Ready:** Maintains performance and sealant flow even in temperatures as low as -15°C, ideal for year-round riders.
- • **Perfect Fit for Fat Bikes:** Specifically designed for 20" x 4.0/4.5" fat bike tires with 32mm Schrader valve for hassle-free installation.
- • **Ride Flat-Free, Fear-Free:** Self-sealing inner tube automatically repairs small punctures so you never get stranded.
- • **Durability That Goes the Distance:** Butyl rubber construction resists friction and wear, extending tube life and reducing maintenance costs.
- • **Emergency-Ready & Easy to Install:** Quick to fit and compatible with mountain, road, cruiser, and electric bikes—your ultimate backup on remote rides.

## Overview

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.

## Description

Product Description

Review: Inner tubes - Just as described
Review: 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.

## Features

- SIZE: 32mm Schrader Valve. Fits all 20"x4.0/4.5 fat bike tire tubes Installation Precautions:Please check the side of your tire for the tire size your bike uses
- Easy To USE: The Self Sealing Bike Inner Tube is a self-repair for some small holes or very fine cracks.For example, after a long time, some places will leak air quietly,accidentally hit nails and other problems, which are easy to repair.It is worth noting that our self-repairing inner tube can be used within the normal temperature environment and cold days -15 ℃,and it is more conducive to travel in cold weather.
- Safe Bike Tubes: Pre-installed with Sealant to provide maximum puncture protection and prevent flat tires on your bike.The puncture repair fluid circulates through the inner tube, automatically sealing the punctures.After testing, the leak can be repaired within 5~8 seconds under normal conditions.
- Ultra Durable: Our inner tubes have higher puncture resistance , and the 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.
- Please note: Because the Self Sealing fluid is flowing, in order to prevent the liquid from flowing out during operation, please do not concentrate the center of gravity or the liquid near the air nozzle when pumping up
- Installation: 20"x4.0"/4.5" fat bicycle replacement inner tube for easy installation and removal. Check the valve position to ensure that the installation direction is correct
- This inner tube is compatible with the corresponding models of mountain bikes, road bikes, Cruiser bikes, electric bikes
- For long-distance travel or use in remote areas, if a tire leak occurs, using a self-sealing inner tube is a very convenient emergency solution, allowing the vehicle to continue riding to the nearest repair shop for professional repair.
- Note: After a tyre/inner tube puncture, the self-sealing inner tube is only a temporary solution and cannot replace professional tyre repair. If the sealant leaks out or air pressure cannot be maintained, it is recommended to go to a professional tyre repair shop as soon as possible for a complete tyre repair.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| 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 |

## Product Details

- **Brand:** YunSCM
- **Valve type:** Schrader
- **Material:** Butyl Rubber
- **Wheel size:** 20 Inches
- **Item diameter:** 20 Inches

## Images

![2Pcs Self-Sealing 20 inch Bike Inner Tubes AV32 - Image 1](https://m.media-amazon.com/images/I/61nk2qx60cL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Does anyone have any experience with a puncture with these tires? Did they work?**
A: Yeah, I bought these in January and both of them were brought down by holes smaller than a pin hole. Don't waste your time on these.

**Q: What's the Psi for the inner tube**
A: PSI is on the tire not the tube.  Probably 20 to 30.

**Q: In case of a large puncture can these tubes be patched in the normal way?**
A: I don't know, but I would think you could patch them. The tubes look and feel like a normal tube.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Inner tubes
*by J***M on 8 February 2026*

Just as described

### ⭐⭐⭐⭐⭐ Do the job as described
*by M***O on 22 December 2023*

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.

### ⭐⭐⭐⭐ Hopefully they don’t puncture as easily as the original ones. 🤞🤞🤞
*by A***E on 20 March 2026*

Seem to be really good but only just fitted so can’t comment on longevity.

## Frequently Bought Together

- 2-PCS 20x4 Heavy Duty Fat E-Bike Tubes 20 x 4.0/4.5 AV32mm Super Automatic Repair, Self-Sealing, Puncture Resistant Compatible with 20x4 20x4 1/4 20x4.25 20x4.50Bike Bicycle Tire Tubes Schrader Valve
- Fat Bike Tire Liner, Bicycle Tube Flat Protector Compatible with 20"/24"/26"/27.5/29"
- HEB VIPERESS 20x4.0 Fat Tire - Puncture Resistant Ebike Tires, 20x4 Fat Bike Tire for Electric Bike, MTB, Heavy Duty, All Terrain Tire for Street/Trail Riding (Qty 2 - Silver Logo, 20 x 4 Fat Tire)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-10-19*