---
product_id: 404806439
title: "YunSCM 2-Pack 20 inch Tubes 20 x 4.0 Bike Tubes AV32mm Schrader Valve Compatible with 20 x 4 inch Fat tire"
brand: "yunscm"
price: "$180.66"
currency: USD
in_stock: true
reviews_count: 5
category: "Yun Scm"
url: https://www.desertcart.us/products/404806439-yunscm-2-pack-20-inch-tubes-20-x-4-0
store_origin: US
region: United States of America
---

# 6-9 months air retention 20-inch diameter fit 40% thicker heavy-duty rubber YunSCM 2-Pack 20 inch Tubes 20 x 4.0 Bike Tubes AV32mm Schrader Valve Compatible with 20 x 4 inch Fat tire

**Brand:** yunscm
**Price:** $180.66
**Availability:** ✅ In Stock

## Summary

> 🛠️ Upgrade your ride with tubes that work as hard as you do!

## Quick Answers

- **What is this?** YunSCM 2-Pack 20 inch Tubes 20 x 4.0 Bike Tubes AV32mm Schrader Valve Compatible with 20 x 4 inch Fat tire by yunscm
- **How much does it cost?** $180.66 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/404806439-yunscm-2-pack-20-inch-tubes-20-x-4-0)

## 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

- • **Built for the Bold:** Heavy-duty 20x3.5/4.0 tubes engineered for fat tire e-bikes and mountain bikes, ready to conquer any terrain.
- • **Stay Fully Inflated:** Air tightness improved by 200%, maintaining optimal tire pressure for up to 9 months—less pumping, more riding.
- • **Effortless Installation:** Designed with a 32mm Schrader valve and easy-fit sizing for quick tube swaps—get back on the trail faster.
- • **Ride Longer, Replace Less:** 40% thicker butyl rubber boosts puncture resistance and durability, slashing maintenance downtime.
- • **Shock Absorber Extraordinaire:** Superior vibration dampening from premium butyl and EPDM rubber ensures a smooth, comfortable ride on rough roads.

## Overview

The YunSCM 2-Pack 20-inch heavy-duty bike tubes are crafted from 40% thicker butyl rubber with EPDM reinforcement, delivering exceptional puncture resistance and air retention for fat tire e-bikes and mountain bikes. Featuring a 32mm Schrader valve, these tubes maintain tire pressure for 6-9 months, reduce maintenance frequency, and provide superior shock absorption for a smoother ride on diverse terrains.

## Description

Heavy duty inner tube: 20 x 3.5 inches / 4.0 inches AV32 mm (89/102-406) heavy-duty bicycle replacement inner tube, these inner tubes are very suitable for a wide range of applications. Enhanced the extensibility of heavy-duty tires, thereby expanding their application range and compatible with 20x3.5 20x4.0 electric bicycle tires.

Review: Passt wunderbar - Gut und dicke Schlauch
Review: Buen material - Entrega muy rápida y buen producto

## 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.
- Application Scenarios: 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.
- 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.
- 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.
- 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.
- 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08Y8MVG2D |
| Brand | YunSCM |
| Brand Name | YunSCM |
| Compatible Tire Width Maximum | 4 Inches |
| Compatible Tire Width Minimum | 89 Millimetres |
| Customer Reviews | 4.5 out of 5 stars 2,003 Reviews |
| Item Diameter | 4 Inches |
| Item Weight | 0.97 Kilograms |
| Item Width | 4 Inches |
| Manufacturer | YunSCM20210306120 |
| Manufacturer Part Number | YunSCM20210306120 |
| Material | Rubber |
| Material Type | Rubber |
| Model Number | GGG120 |
| Mountain Bike Type | Mountain Bike |
| Number of Items | 2 |
| Size | 20x3.5/4.0 |
| UPC | 750139075553 |
| Unit Count | 2 Count |
| Valve Length | 1.57 Inches |
| Valve Type | Schrader |
| Whats In The Box1 - Whats In The Box3 | 2 pcs 20x3.5/4.0 AV32mm Schrader Valve heavy duty ebike tubes |
| Wheel Size | 20 Inches |

## Product Details

- **Brand:** YunSCM
- **Item Diameter:** 4 inches
- **Material:** Butyl Rubber
- **Valve Type:** Schrader
- **Wheel Size:** 20 inches

## Images

![YunSCM 2-Pack 20 inch Tubes 20 x 4.0 Bike Tubes AV32mm Schrader Valve Compatible with 20 x 4 inch Fat tire - Image 1](https://m.media-amazon.com/images/I/710NEA3H+NL.jpg)
![YunSCM 2-Pack 20 inch Tubes 20 x 4.0 Bike Tubes AV32mm Schrader Valve Compatible with 20 x 4 inch Fat tire - Image 2](https://m.media-amazon.com/images/I/71GxWjkx5vL.jpg)
![YunSCM 2-Pack 20 inch Tubes 20 x 4.0 Bike Tubes AV32mm Schrader Valve Compatible with 20 x 4 inch Fat tire - Image 3](https://m.media-amazon.com/images/I/61aYXrciDgL.jpg)
![YunSCM 2-Pack 20 inch Tubes 20 x 4.0 Bike Tubes AV32mm Schrader Valve Compatible with 20 x 4 inch Fat tire - Image 4](https://m.media-amazon.com/images/I/61qxT9zSOwL.jpg)
![YunSCM 2-Pack 20 inch Tubes 20 x 4.0 Bike Tubes AV32mm Schrader Valve Compatible with 20 x 4 inch Fat tire - Image 5](https://m.media-amazon.com/images/I/717nVkihb6L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Passt wunderbar
*by A***D on 16 May 2026*

Gut und dicke Schlauch

### ⭐⭐⭐⭐⭐ Buen material
*by V***E on 10 July 2025*

Entrega muy rápida y buen producto

### ⭐⭐⭐⭐⭐ Perfetti!
*by Z***M on 29 November 2025*

Arrivati puntuali come sempre. Ottimi!

## Frequently Bought Together

- 2-PCS 20x4 Heavy Duty E-Bike Tubes 20X4.0 AV32mm (89/102-406) Inner Tubes 20" x 4.0" Compatible with 20x3.5/4.0 E-Bike Bicycle Fat Tire Tubes Schrader Valve
- Ultraverse Fat Tire Liners Tube Protection Against Flats, 20, 24 and 26 inch x 4.0 tire Size, Durable Extruded Plastic Shield for Puncture Free Bike Rides – 2 Pack
- ULTRAVERSE 20x4 E-Bike Fat Tire - Robust, High-Performance 20inch Fat Tyre for MTB and Ebikes, Durable All-Terrain Directional Tread, Superior Density for Street & Trail Adventures-2 Unit

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-08-11*