---
product_id: 8757063
title: "SG-3C40 Nexus Sprocket (18T)"
brand: "shimano"
price: "R$243"
currency: BRL
in_stock: true
reviews_count: 8
category: "Shimano"
url: https://www.desertcart.com.br/products/8757063-sg-3c40-nexus-sprocket-18t
store_origin: BR
region: Brazil
---

# compatible with 1/8" & 3/32" chains 18-tooth precision sprocket fits 3-tab coaster brakes & internal hubs SG-3C40 Nexus Sprocket (18T)

**Brand:** shimano
**Price:** R$243
**Availability:** ✅ In Stock

## Summary

> ⚙️ Upgrade your ride with the quiet power of Shimano precision!

## Quick Answers

- **What is this?** SG-3C40 Nexus Sprocket (18T) by shimano
- **How much does it cost?** R$243 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/8757063-sg-3c40-nexus-sprocket-18t)

## 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

- • **Dual Chain Support:** Engineered to fit both 1/8" and 3/32" chains, ensuring smooth integration with your existing drivetrain.
- • **Precision Engineering:** 18-tooth sprocket crafted for quiet, smooth, and efficient power transfer—ditch the noise and ride in style.
- • **Lightweight Durability:** Ultra-light at just 0.01 ounces, this sprocket delivers robust performance without weighing you down.
- • **Seamless Compatibility:** Works flawlessly with Shimano Alfine, Nexus, and any 3-tab coaster brake or internally geared hub for ultimate versatility.
- • **Trusted Shimano Quality:** Backed by Shimano’s legacy and a limited warranty, guaranteeing reliability for your daily rides and weekend adventures.

## Overview

The Shimano SG-3C40 Nexus Sprocket (18T) is a high-quality, lightweight sprocket designed for compatibility with 3-tab coaster brakes and internally geared hubs. It supports both 1/8" and 3/32" chains, ensuring versatile use across Shimano Alfine and Nexus systems. Engineered for smooth, quiet operation, this sprocket is a trusted replacement part that enhances drivetrain performance and durability.

## Description

Shimano Alfine and nexus cogs work with either a 1/8 or 3/32 chain. Will also fit any 3 tabbed coaster brake or internally gear hub.

Review: quality sprocket - I bought a cruiser bike with a KT coaster brake and KT sprocket. The sprocket was warped and the shape of the teeth was primitive. It was not meshing properly with the chain and making lots of loud ugly noises. The Shimano sprocket was a perfect replacement and everything is working quietly and smoothly.
Review: Four Stars - good

## Features

- Will also fit any 3 tabbed coaster brake or internally gear hub
- Will work with either 1/8" or 3/32" chains
- Shimano Reference Number: SG-3R40

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001GSSO1W |
| Best Sellers Rank | #602,383 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #511 in Bike Cassettes & Freewheels |
| Brand Name | SHIMANO |
| Color | silver |
| Customer Reviews | 4.5 4.5 out of 5 stars (28) |
| Date First Available | September 27, 2008 |
| Included Components | Internally Geared Hub Part |
| Item Dimensions LxWxH | 2.75 x 2.75 x 0.25 inches |
| Item Package Dimensions L x W x H | 3 x 3 x 0.1 inches |
| Item Weight | 0.01 Ounces |
| Manufacturer | Shimano |
| Model Name | Nexus & Alfine Cogs |
| Number of Items | 1 |
| Package Weight | 0.05 Pounds |
| Part Number | Y32203420 |
| Size | 18T |
| Style | Internally Geared Hub Part |
| Suggested Users | unisex-adult |
| Warranty Description | Limited Warranty |

## Images

![SG-3C40 Nexus Sprocket (18T) - Image 1](https://m.media-amazon.com/images/I/917HPmRy6zL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ quality sprocket
*by E***L on July 1, 2023*

I bought a cruiser bike with a KT coaster brake and KT sprocket. The sprocket was warped and the shape of the teeth was primitive. It was not meshing properly with the chain and making lots of loud ugly noises. The Shimano sprocket was a perfect replacement and everything is working quietly and smoothly.

### ⭐⭐⭐⭐ Four Stars
*by L***G on January 21, 2015*

good

### ⭐⭐⭐⭐⭐ Great
*by S***Y on June 25, 2014*

This was one of my early purchases and got me off to a good start delivery on time part perfect cannot fault it everything good, can recommend product and company.

## Frequently Bought Together

- Shimano SG-3C40 Nexus Sprocket (18T)
- Shimano SG-8S31 Alfine/Nexus small parts kit
- SHIMANO Nexus 16 Tooth cog, Black

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**Shop now:** [https://www.desertcart.com.br/products/8757063-sg-3c40-nexus-sprocket-18t](https://www.desertcart.com.br/products/8757063-sg-3c40-nexus-sprocket-18t)

---

*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-03-08*