---
product_id: 400798280
title: "Shimano 2 Ports Junction, EW-JC302, SD300 Port X 2"
brand: "shimano"
price: "171.45 DT"
currency: TND
in_stock: true
reviews_count: 8
category: "Shimano"
url: https://www.desertcart.tn/products/400798280-shimano-2-ports-junction-ew-jc302-sd300-port-x-2
store_origin: TN
region: Tunisia
---

# Advanced E-tube signal tech 2-port seamless connectivity Weatherproof durable build Shimano 2 Ports Junction, EW-JC302, SD300 Port X 2

**Brand:** shimano
**Price:** 171.45 DT
**Availability:** ✅ In Stock

## Summary

> ⚡ Power your ride with flawless shifts and zero downtime!

## Quick Answers

- **What is this?** Shimano 2 Ports Junction, EW-JC302, SD300 Port X 2 by shimano
- **How much does it cost?** 171.45 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/400798280-shimano-2-ports-junction-ew-jc302-sd300-port-x-2)

## Best For

- shimano enthusiasts

## Why This Product

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

## Key Features

- • **All-Weather Durability:** Crafted from premium plastic and aluminum to withstand any ride, rain or shine.
- • **Universal Compatibility:** Perfectly engineered for road, mountain, and commuter bikes—upgrade your ride effortlessly.
- • **Next-Level Signal Precision:** Harness Shimano’s E-tube technology for ultra-reliable, lightning-fast electronic shifting.
- • **Streamlined Dual-Port Design:** Minimize cable clutter with two efficient connection ports for flawless integration.
- • **Future-Proof Firmware Updates:** Stay ahead with seamless Di2 system checker updates, ensuring peak performance every time.

## Overview

The Shimano EW-JC302 2-Port Junction Box is a robust, weather-resistant electronic shifting hub designed for seamless integration with Shimano Di2 systems. Featuring advanced E-tube technology and firmware compatibility, it ensures precise signal transmission and easy updates, making it an essential upgrade for road, mountain, and commuter cyclists seeking reliable, clutter-free connectivity.

## Description

Internal 2-Port Junction for EW-SD300Updated with new electric wire SD300

Review: Connector needed - Cable plus connector pair to update software. Worked well.
Review: Works and saves a trip to the bike shop - Worked perfectly to update the firmware on my DI2 9200 shifters. I connected the cable from the front mech to the upgrade cable with this connector and the ETube app saw the shifter and updated it. Easy peasy.

## Features

- Constructed from , durable plastic and cable management materials, the EW-JC302 Di2 Junction Box ensures reliable performance and longevity in all weather conditions.
- Engineered for seamless integration with 's Electronic shifting systems, this junction box provides robust connectivity with two ports for efficient wiring and minimal cable clutter.
- Featuring advanced E-tube technology, the EW-JC302 allows for precise signal transmission between front and rear derailleurs, cockpit controls, and the battery, optimizing shifting performance and reliability.
- Designed for road, mountain, and commuter bikes, this junction box offers a clean, streamlined aesthetic while supporting easy installation and maintenance for a variety of cycling disciplines.
- Includes firmware compatibility management, ensuring smooth synchronization with all Di2 components through firmware updates via the Di2 system checker, preventing malfunctions and enhancing performance.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B093NL1K8H |
| Best Sellers Rank | #106,702 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #45 in Cycling Electronics |
| Brand | SHIMANO |
| Brand Name | SHIMANO |
| Capacity | 1 fluid ounces |
| Color | Black |
| Customer Reviews | 4.5 out of 5 stars 49 Reviews |
| Finish Type | Natural |
| Included Components | Junction Box |
| Installation Type | Screw-In |
| Manufacturer | Shimano |
| Material | Aluminum |
| Model Number | EW-JC302 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | IEWJC302 |
| Style | Junction Box |
| UPC | 192790597188 |
| Unit Count | 1 Count |
| Warranty Description | Limited Warranty |

## Product Details

- **Brand:** SHIMANO
- **Color:** black
- **Material:** Aluminum
- **Case Material:** Aluminum
- **Mounting Type:** Handlebar Mount

## Images

![Shimano 2 Ports Junction, EW-JC302, SD300 Port X 2 - Image 1](https://m.media-amazon.com/images/I/41wkeRM-cyL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Connector needed
*by G***N on February 2, 2026*

Cable plus connector pair to update software. Worked well.

### ⭐⭐⭐⭐⭐ Works and saves a trip to the bike shop
*by A***R on November 17, 2025*

Worked perfectly to update the firmware on my DI2 9200 shifters. I connected the cable from the front mech to the upgrade cable with this connector and the ETube app saw the shifter and updated it. Easy peasy.

### ⭐⭐⭐⭐⭐ Worked
*by L***I on July 12, 2025*

I updated the firmware in my Ultrega 12-speed Di2 shifters using this junction and a Di2 cable "SHIMANO 2Nd Gen E-Tube Di2 Wire Ew-Sd300, 1400Mm". I'm a bit disappointed in Shimano that a wired connection is needed to update, though.

## Frequently Bought Together

- SHIMANO 2 PORT JUNCTION EW JC302 SD300 PORT X 2
- SHIMANO 2Nd Gen E-Tube Di2 Wire
- SHIMANO Cycling Y7HE40000 TL-EW300 Cable Tool - Replacement Spare Parts for Bike

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**Shop now:** [https://www.desertcart.tn/products/400798280-shimano-2-ports-junction-ew-jc302-sd300-port-x-2](https://www.desertcart.tn/products/400798280-shimano-2-ports-junction-ew-jc302-sd300-port-x-2)

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-09-20*