---
product_id: 415260358
title: "YunSCM 20x4 Heavy Duty Fat Bike Tubes 102-406 20x4.0 E-Bike Fat Tyre Tubes 20\" Compatible with 20x3.50-4.0 Mountain/Road/e Bike/Bicycle Tube 20x3.5 20 x 4.0| AV32mm Schrader Valve"
brand: "yunscm"
price: "R1717"
currency: ZAR
in_stock: true
reviews_count: 8
url: https://www.desertcart.co.za/products/415260358-yunscm-20x4-heavy-duty-fat-bike-tubes-102-406-20x4
store_origin: ZA
region: South Africa
---

# 200% improved air tightness 20x3.5-4.0 inch universal fit 40% thicker butyl rubber for durability YunSCM 20x4 Heavy Duty Fat Bike Tubes 102-406 20x4.0 E-Bike Fat Tyre Tubes 20" Compatible with 20x3.50-4.0 Mountain/Road/e Bike/Bicycle Tube 20x3.5 20 x 4.0| AV32mm Schrader Valve

**Brand:** yunscm
**Price:** R1717
**Availability:** ✅ In Stock

## Summary

> 🚴‍♂️ Ride Tough, Ride Smart — Never Miss a Mile!

## Quick Answers

- **What is this?** YunSCM 20x4 Heavy Duty Fat Bike Tubes 102-406 20x4.0 E-Bike Fat Tyre Tubes 20" Compatible with 20x3.50-4.0 Mountain/Road/e Bike/Bicycle Tube 20x3.5 20 x 4.0| AV32mm Schrader Valve by yunscm
- **How much does it cost?** R1717 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/415260358-yunscm-20x4-heavy-duty-fat-bike-tubes-102-406-20x4)

## 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

- • **Value 4-Pack:** Includes four tubes with reliable AV32mm Schrader valves—easy to install and ready to keep you rolling.
- • **Built to Last:** Heavy-duty butyl rubber composite resists punctures and abrasion, extending tube life and cutting maintenance costs.
- • **Stay Inflated Longer:** Enhanced air tightness keeps tire pressure stable 200% longer, reducing inflation frequency and boosting ride safety.
- • **Smooth Ride Guaranteed:** Superior shock absorption minimizes vibrations and bumps, delivering maximum comfort on any terrain.
- • **Universal Fit for Fat & E-Bikes:** Compatible with 20x3.5 to 20x4.0 tires, perfect for mountain, road, cruiser, and e-bikes.

## Overview

YunSCM 20x4 Heavy Duty Fat Bike Tubes are engineered with 40% thicker butyl rubber and 200% better air retention, designed to fit a wide range of 20-inch fat and e-bike tires. This 4-pack offers durable, puncture-resistant inner tubes that enhance ride comfort through superior shock absorption, making them the ultimate upgrade for serious cyclists seeking reliability and performance.

## Description

YunSCM 20x4 Heavy Duty Fat Bike Tubes 102-406 20x4.0 E-Bike Fat Tyre Tubes 20" Compatible with 20x3.50-4.0 Mountain/Road/e Bike/Bicycle Tube 20x3.5 20 x 4.0| AV32mm Schrader Valve

## Features

- Compatible Size: 20 x 3.50/3.70/4.0 inch AV(89/102-406) bicycle heavy duty inner tube, enhanced the ductility of the heavy load tyre, so that these inner tubes are ideal for a wide range of applications, compatible with 20x3.5 20x3.6 20x3.7 20x3.8 20x3.9 20x4.0 mountain bikes, road bikes, Cruiser bikes, and e-bikes; and the increased thickness meets the demand for longer mileage and heavier loads of today's popular e-bikes
- High Quality & Durable Tube: The bike tyre tube made of high quality butyl rubber composite material, high performance hose has higher puncture resistance than traditional hoses. The thicker tyre body can withstand more friction and abrasion, which extends the life of the hose and reduces replacement frequency and maintenance costs. And it can be used for a long time
- More Air Tightness: Adopting high elasticity and high quality butyl rubber and EPDM rubber, the thickness is increased by 40%, the air tightness of the inner tube is increased by 200% compared with the ordinary butyl inner tube; the tire can continuously maintain a stable inflation air pressure state after inflation, which dramatically reduces the frequency of inflation, and the good air tightness helps to keep the pressure of the tire stable, which improves the driving safety and efficiency
- 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
- Package Contains: 4PCS heavy duty bike tubes 20 x 3.50/4.0 inch AV32mm Schrader Valve. Easy to install and remove, and check the valve position to ensure that it is installed in the correct direction
- 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 |
|---------------|-------|
| Bike type | Mountain Bike |
| Color | 20x3.50/4.0 89/102-406 |
| Size | 4-Pack |
| Style | riding |
| Material type | Butyl Rubber |
| Wheel size | 2E+1 Inches |
| Included components | NO |
| Batteries included? | No |
| Brand | YunSCM |
| Department | Unisex |
| Manufacturer | YunSCM2021622146 |
| Item model number | YunSCM2021622146 |
| Package Dimensions | 22.4 x 21.69 x 8.1 cm; 1.54 kg |
| ASIN | B097PPTD38 |

## Product Details

- **Brand:** YunSCM
- **Valve type:** Schrader
- **Material:** Butyl Rubber
- **Wheel size:** 2E+1 Inches
- **Item diameter:** 2E+1 Inches

## Images

![YunSCM 20x4 Heavy Duty Fat Bike Tubes 102-406 20x4.0 E-Bike Fat Tyre Tubes 20" Compatible with 20x3.50-4.0 Mountain/Road/e Bike/Bicycle Tube 20x3.5 20 x 4.0| AV32mm Schrader Valve - Image 1](https://m.media-amazon.com/images/I/71MeZSVKkaL.jpg)
![YunSCM 20x4 Heavy Duty Fat Bike Tubes 102-406 20x4.0 E-Bike Fat Tyre Tubes 20" Compatible with 20x3.50-4.0 Mountain/Road/e Bike/Bicycle Tube 20x3.5 20 x 4.0| AV32mm Schrader Valve - Image 2](https://m.media-amazon.com/images/I/61fN9Gfr2JL.jpg)
![YunSCM 20x4 Heavy Duty Fat Bike Tubes 102-406 20x4.0 E-Bike Fat Tyre Tubes 20" Compatible with 20x3.50-4.0 Mountain/Road/e Bike/Bicycle Tube 20x3.5 20 x 4.0| AV32mm Schrader Valve - Image 3](https://m.media-amazon.com/images/I/71x8EIy5XdL.jpg)
![YunSCM 20x4 Heavy Duty Fat Bike Tubes 102-406 20x4.0 E-Bike Fat Tyre Tubes 20" Compatible with 20x3.50-4.0 Mountain/Road/e Bike/Bicycle Tube 20x3.5 20 x 4.0| AV32mm Schrader Valve - Image 4](https://m.media-amazon.com/images/I/61XpSEAxpEL.jpg)
![YunSCM 20x4 Heavy Duty Fat Bike Tubes 102-406 20x4.0 E-Bike Fat Tyre Tubes 20" Compatible with 20x3.50-4.0 Mountain/Road/e Bike/Bicycle Tube 20x3.5 20 x 4.0| AV32mm Schrader Valve - Image 5](https://m.media-amazon.com/images/I/812y8d1fTiL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Inner tube review
*by A***R on 15 May 2025*

Excellent quality, nice and thick as described. Quick delivery. Would recommend

### ⭐⭐⭐⭐⭐ Does the job
*by C***E on 11 June 2025*

Perfect to replace the tube on my e-bike

### ⭐⭐⭐⭐⭐ Inner tube
*by P***H on 8 September 2025*

Super fast delivery as normal, not used yet but seem strong tough tubes

## Frequently Bought Together

- YunSCM 4-Pack 20'' Fat Bike Tyre Tube 20x3.50/4.0 89/102-406 InnerTubes AV32mm Schrader Valve 20" Bicycle Fat Tubes Compatible with 20x3.5 20x3.6 20x3.7 20x3.8 20x3.9 20x4.0 MTB Bike Tyre Tubes
- Slime 10015 Bike Tube Puncture Repair Sealant, Prevent and Repair, Suitable for all Bicycles, Non-Toxic, Eco-Friendly, 237 mL (8oz) bottle, Green
- 1PZ F3T-2X4 Fat Bike Tyre 20 x 4.0 for 20Inch Electric Mountain Bike Snow Bike Beach Bike 20x4.10 20x4.20 20x4.25 20x4.35 20x4.40 20x4.50

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.co.za/products/415260358-yunscm-20x4-heavy-duty-fat-bike-tubes-102-406-20x4](https://www.desertcart.co.za/products/415260358-yunscm-20x4-heavy-duty-fat-bike-tubes-102-406-20x4)

---

*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-02-21*