---
product_id: 316243044
title: "YUNSCM 2-PCS 20x4 Heavy Duty Fat Tire Tubes Schrader Valve Premium Butyl Rubber 20 Bike Tubes Compatible with 20x3.5/4.0 89/102-406 E-Bike/Mountain Bike/Street Bike Bicycle Tire Tubes"
brand: "yunscm"
price: "A$72"
currency: AUD
in_stock: true
reviews_count: 13
category: "Yun Scm"
url: https://www.desertcart.com.au/products/316243044-yunscm-2-pcs-20x4-heavy-duty-fat-tire-tubes-schrader
store_origin: AU
region: Australia
---

# 6-9 months air retention 20-inch wheel fit 40% thicker butyl rubber YUNSCM 2-PCS 20x4 Heavy Duty Fat Tire Tubes Schrader Valve Premium Butyl Rubber 20 Bike Tubes Compatible with 20x3.5/4.0 89/102-406 E-Bike/Mountain Bike/Street Bike Bicycle Tire Tubes

**Brand:** yunscm
**Price:** A$72
**Availability:** ✅ In Stock

## Summary

> 🛞 Upgrade your ride with unstoppable durability and comfort!

## Quick Answers

- **What is this?** YUNSCM 2-PCS 20x4 Heavy Duty Fat Tire Tubes Schrader Valve Premium Butyl Rubber 20 Bike Tubes Compatible with 20x3.5/4.0 89/102-406 E-Bike/Mountain Bike/Street Bike Bicycle Tire Tubes by yunscm
- **How much does it cost?** A$72 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/316243044-yunscm-2-pcs-20x4-heavy-duty-fat-tire-tubes-schrader)

## 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 fat tire tubes engineered for e-bikes and mountain bikes, ready to conquer any terrain.
- • **Unmatched Durability:** 40% thicker premium butyl rubber boosts puncture resistance and extends tube life, slashing maintenance downtime.
- • **Long-Lasting Air Seal:** Superior air tightness holds pressure 200% longer, keeping your ride smooth and worry-free for up to 9 months.
- • **Effortless Installation:** Designed for quick, hassle-free tube replacement with Schrader valve compatibility—get back on the road faster.
- • **Shock Absorber Extraordinaire:** High-elasticity rubber absorbs bumps and vibrations, delivering a cushioned, comfortable ride every time.

## Overview

The YUNSCM 2-PCS 20x4 Heavy Duty Fat Tire Tubes feature premium butyl rubber construction with 40% increased thickness and enhanced air tightness, designed specifically for 20-inch e-bikes, mountain, and street bikes. Compatible with tire widths from 3.5 to 4.0 inches, these tubes offer superior puncture resistance, maintain air pressure for 6-9 months, and provide excellent shock absorption for a smooth, reliable ride.

## Description

desertcart.com : YUNSCM 2-PCS 20x4 Heavy Duty Fat Tire Tubes Schrader Valve Premium Butyl Rubber 20 Bike Tubes Compatible with 20x3.5/4.0 89/102-406 E-Bike/Mountain Bike/Street Bike Bicycle Tire Tubes : Sports & Outdoors

Review: Great replacement for AddMotor 'HEROTRI M-365X' front or rear - - Compatibility - I used this to replace the tube in the Front Tire of my AddMotor 'HEROTRI M-365X'. I expect, it will fit the back tires equally well. - Durability - The tubes seem hefty & durable, maybe even more so than the original tube I replaced. I expect that the thick butyl rubber construction will make this replacement outlast the original. - Ease of Installation - Everything fit great & installed easily. The whole process took less than 30 minutes. This install was much easier than my previous experiences with my mountain bike & electric scooter. I had been a bit nervous before the installation due to the electric motor being located in the front wheel, but it was not an issue. Big thanks to AddMotor engineers for making the replacement quick and easy with an unpluggable powerline to the front motor. - Tools - 3/4" Wrench Tire Levers Zip Tie I used a 3/4" wrench to remove the wheel. I used a cheap pair of tire levers that I found in my garage to help remove & replace the tire. I'd suggest getting an inexpensive pair, or using a couple of flat head screwdrivers. Not a lot of force was required, but they defiantly made the job a lot easier. Also, I used a zip-tie to help secure the power cable after re-installation.
Review: Great product, would definitely buy again. - Great product, would definitely buy again.

## Features

- Designed for E-bike 20 "X4.0" Heavy Duty inner tubes: 20"x3.5/4.0 (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.
- 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.
- 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.
- 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.
- This heavy duty inner tube is compatible with the corresponding models of mountain bikes, road bikes, Cruiser bikes, electric 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.
- 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 |
| Best Sellers Rank | #13,108 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #41 in Bike Tubes |
| Brand | YunSCM |
| Brand Name | YunSCM |
| Color | 20x3.50/4.0 89/102-406 |
| Compatible Tire Width Maximum | 4 Inches |
| Compatible Tire Width Minimum | 3.5 Inches |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,884) |
| Date First Available | March 8, 2021 |
| Item Diameter | 4 Inches |
| Item Dimensions LxWxH | 3.15 x 2.76 x 1.18 inches |
| Item Package Dimensions L x W x H | 9.96 x 6.26 x 3.15 inches |
| Item Weight | 0.97 Kilograms |
| Item Width | 4 Inches |
| Manufacturer | YunSCM20210306120 |
| Material | Butyl Rubber |
| Model Name | 20x3.5/4.0 |
| Model Year | 2022 |
| Package Weight | 0.97 Kilograms |
| Part Number | YunSCM20210306120 |
| Size | 20x3.5/4.0 |
| Style | Riding |
| Suggested Users | unisex |
| UPC | 750139075553 |
| Valve Length | 1.57 Inches |
| Valve Type | Schrader |
| 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-PCS 20x4 Heavy Duty Fat Tire Tubes Schrader Valve Premium Butyl Rubber 20 Bike Tubes Compatible with 20x3.5/4.0 89/102-406 E-Bike/Mountain Bike/Street Bike Bicycle Tire Tubes - Image 1](https://m.media-amazon.com/images/I/71p23hT+lqL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great replacement for AddMotor 'HEROTRI M-365X' front or rear
*by W***B on November 29, 2023*

- Compatibility - I used this to replace the tube in the Front Tire of my AddMotor 'HEROTRI M-365X'. I expect, it will fit the back tires equally well. - Durability - The tubes seem hefty & durable, maybe even more so than the original tube I replaced. I expect that the thick butyl rubber construction will make this replacement outlast the original. - Ease of Installation - Everything fit great & installed easily. The whole process took less than 30 minutes. This install was much easier than my previous experiences with my mountain bike & electric scooter. I had been a bit nervous before the installation due to the electric motor being located in the front wheel, but it was not an issue. Big thanks to AddMotor engineers for making the replacement quick and easy with an unpluggable powerline to the front motor. - Tools - 3/4" Wrench Tire Levers Zip Tie I used a 3/4" wrench to remove the wheel. I used a cheap pair of tire levers that I found in my garage to help remove & replace the tire. I'd suggest getting an inexpensive pair, or using a couple of flat head screwdrivers. Not a lot of force was required, but they defiantly made the job a lot easier. Also, I used a zip-tie to help secure the power cable after re-installation.

### ⭐⭐⭐⭐⭐ Great product, would definitely buy again.
*by J***Y on December 1, 2025*

Great product, would definitely buy again.

### ⭐⭐⭐⭐⭐ They're well worth the money
*by R***E on January 26, 2026*

They're thick heavy duty with great grip. I can lean into a curve, big time. Thank you. I will be buying them again

## 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 Australia*
*Store origin: AU*
*Last updated: 2026-02-15*