---
product_id: 610327880
title: "80/100-21 Inner Tube,2.5mm Thickened Motocross Tubes 3.00-21 90/90-21 Heavy Duty Motorcycle Inner Tube,TR4 Straight Valve Stem"
brand: "rutu"
price: "₩106535"
currency: KRW
in_stock: true
url: https://www.desertcart.kr/products/610327880-80-100-21-inner-tube-2-5mm-thickened-motocross-tubes
store_origin: KR
region: South Korea
---

# TR4 straight valve stem included 2.5mm thick heavy-duty tube High butyl rubber for superior air retention 80/100-21 Inner Tube,2.5mm Thickened Motocross Tubes 3.00-21 90/90-21 Heavy Duty Motorcycle Inner Tube,TR4 Straight Valve Stem

**Brand:** rutu
**Price:** ₩106535
**Availability:** ✅ In Stock

## Summary

> 🛞 Ride Tough, Ride Smooth – Never Miss a Beat on the Trail!

## Quick Answers

- **What is this?** 80/100-21 Inner Tube,2.5mm Thickened Motocross Tubes 3.00-21 90/90-21 Heavy Duty Motorcycle Inner Tube,TR4 Straight Valve Stem by rutu
- **How much does it cost?** ₩106535 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/610327880-80-100-21-inner-tube-2-5mm-thickened-motocross-tubes)

## Best For

- rutu enthusiasts

## Why This Product

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

## Key Features

- • **Versatile Fit:** Fits a wide range of 21-inch tires from 2.75-21 to 90/90-21 for ultimate compatibility.
- • **Pro-Grade Protection:** Includes a premium rim strip to shield against spoke-end punctures—ride worry-free.
- • **Unmatched Durability:** 2.5mm thickened tube built to resist motocross punctures and rough terrain.
- • **Enhanced Ride Comfort:** High butyl content rubber ensures better air retention and superior shock absorption.
- • **Complete Ready-to-Install Kit:** Comes with TR4 valve stem, plastic dust cap, rim strip, and spare copper dust cap for hassle-free setup.

## Overview

The RUTU Heavy Duty 80/100-21 Inner Tube features a reinforced 2.5mm thick butyl rubber construction designed for motocross and enduro riders. Compatible with multiple 21-inch tire sizes, it offers superior air retention and shock absorption. The package includes a TR4 valve stem, rim strip, and dust caps, ensuring professional-grade protection and easy installation for a reliable, smooth ride.

## Description

80/100-21 Inner Tube,2.5mm Thickened Motocross Tubes 3.00-21 90/90-21 Heavy Duty Motorcycle Inner Tube,TR4 Straight Valve Stem

## Features

- WIDE COMPATIBILITY :Our reinforced 2.75/3.00-21 inch inner tube fits 2.75-21,3.00-21,80/80-21,80/90-21,90/90-21,80/100-21 tires.
- PUNCTURE RESISTANT:RUTU super heavy duty 2.5mm thick inner tube is built to withstand the rigors of motocross and enduro use.
- HIGHER PERFOMANCE:High butyl content rubber provides better air retenion to prevent air leakage and offers better shock and vibration absorption performance for a smoother ride.
- PROFESSIONAL GRADE: Set includs a dirtbike rim strip made from high-quality rubber material that can effectively protect the inner tube from spoke end punctures.
- PACKAGE INCLUDES:1×2.75/3.00-21 inner tube with TR4 valve stem,1 x plastic dust cap, 1×rim strip,1× spare copper dust cap.Please feel free to contact us with any questions.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | RUTU |
| Brand | RUTU |
| Model | Heavy Duty Inner Tube |
| Manufacturer reference | RTTY539 |
| Manufacturer part number | RTTY539 |
| Rim Diameter | 21 Inches |
| Rim Width | 2.25 Inches |
| Item Weight | 1.09 kg |

## Product Details

- **Brand:** RUTU
- **Valve type:** Schrader
- **Material:** Rubber
- **Bike type:** Mountain Bike
- **Wheel size:** 21 Inches

## Images

![80/100-21 Inner Tube,2.5mm Thickened Motocross Tubes 3.00-21 90/90-21 Heavy Duty Motorcycle Inner Tube,TR4 Straight Valve Stem - Image 1](https://m.media-amazon.com/images/I/617TWoo3ENL.jpg)

## Available Options

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

## Frequently Bought Together

- 80/100-21 Inner Tube,2.5mm Thickened Motocross Tubes 3.00-21 90/90-21 Heavy Duty Motorcycle Inner Tube,TR4 Straight Valve Stem
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**Shop now:** [https://www.desertcart.kr/products/610327880-80-100-21-inner-tube-2-5mm-thickened-motocross-tubes](https://www.desertcart.kr/products/610327880-80-100-21-inner-tube-2-5mm-thickened-motocross-tubes)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-01-31*