---
product_id: 4729637
title: "JT Sprockets JTR1842.42 42T Steel Rear Sprocket , black"
brand: "jt"
price: "488 kr"
currency: DKK
in_stock: true
reviews_count: 5
category: "Jt"
url: https://www.desertcart.dk/products/4729637-jt-sprockets-jtr1842-42-42t-steel-rear-sprocket-black
store_origin: DK
region: Denmark
---

# Heat-treated C49 high carbon steel 42 teeth precision cut 10-step quality control JT Sprockets JTR1842.42 42T Steel Rear Sprocket , black

**Brand:** jt
**Price:** 488 kr
**Availability:** ✅ In Stock

## Summary

> ⚡ Shift into high gear with JT Sprockets — where precision meets power!

## Quick Answers

- **What is this?** JT Sprockets JTR1842.42 42T Steel Rear Sprocket , black by jt
- **How much does it cost?** 488 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/4729637-jt-sprockets-jtr1842-42-42t-steel-rear-sprocket-black)

## Best For

- jt enthusiasts

## Why This Product

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

## Key Features

- • **Upgrade Your Ride:** Transforms your bike’s gearing for comfortable cruising speeds up to 70 MPH—leave stock limitations behind.
- • **Quality You Can Trust:** Undergoes 10 rigorous quality control checks before shipping to guarantee flawless performance.
- • **Race-Ready Durability:** Crafted from premium C49 high carbon steel for unmatched strength and longevity.
- • **Hand-Finished Perfection:** Each sprocket is heat treated and hand finished to exceed industry standards.
- • **Precision Machined Performance:** Accurately engineered sprocket teeth ensure smooth power transfer and optimal ride efficiency.

## Overview

The JT Sprockets JTR1842.42 is a 42-tooth rear sprocket made in the USA from heat-treated C49 high carbon steel. Designed for durability and precision, it undergoes 10 quality control checks and hand finishing to ensure top-tier performance. Ideal for riders seeking to upgrade their bike’s speed and reliability, this sprocket enables smoother cruising at higher speeds while maintaining long-lasting strength.

## Description

DescriptionJT Sprockets ensures maximum durability and performance through accurate machining and using only the best grade of C49 high carbon steel. Heat treated and hand finished to perfection, all JT Sprockets meet or exceed the highest possible quality standards for the powersports industry. Each sprocket goes through 10 quality control checks before it leaves the factory.

Review: Made my TW200 much more rideable - With the stock 50T sprocket, I was already in top gear at 25 MPH and was uncomfortable go over 45 MPH... With the 42T sprocket I can now comfortably cruise at 65-70 MPH all day. However you will need washers to use the stock bolts since this sprocket is thicker than the stock one.
Review: my sprocket review - I love my new JT sprocket- it makes me go fast! Wheeeeee!

## Features

- Country of Origin: United States

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001AVONO2 |
| Best Sellers Rank | #1,442,333 in Automotive ( See Top 100 in Automotive ) #2,090 in Powersports Sprockets |
| Brand | JT |
| Customer Reviews | 4.6 4.6 out of 5 stars (11) |
| Date First Available | December 18, 2009 |
| Exterior | Painted |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1 pounds |
| Item model number | JTR1842.42 |
| Manufacturer | JT Sprockets |
| Manufacturer Part Number | 55-184242 |
| Model | JTR1842.42 |
| Product Dimensions | 8.7 x 7.7 x 5 inches |

## Images

![JT Sprockets JTR1842.42 42T Steel Rear Sprocket , black - Image 1](https://m.media-amazon.com/images/I/51M3m6IrsPL.jpg)
![JT Sprockets JTR1842.42 42T Steel Rear Sprocket , black - Image 2](https://m.media-amazon.com/images/I/51tydnRcu1L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Made my TW200 much more rideable
*by H***A on June 15, 2024*

With the stock 50T sprocket, I was already in top gear at 25 MPH and was uncomfortable go over 45 MPH... With the 42T sprocket I can now comfortably cruise at 65-70 MPH all day. However you will need washers to use the stock bolts since this sprocket is thicker than the stock one.

### ⭐⭐⭐⭐⭐ my sprocket review
*by D***Y on November 23, 2014*

I love my new JT sprocket- it makes me go fast! Wheeeeee!

### ⭐⭐⭐ Wrong size search results
*by K***A on June 16, 2021*

Material seems durable but it was 420, I ordered 428

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**Shop now:** [https://www.desertcart.dk/products/4729637-jt-sprockets-jtr1842-42-42t-steel-rear-sprocket-black](https://www.desertcart.dk/products/4729637-jt-sprockets-jtr1842-42-42t-steel-rear-sprocket-black)

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-02-08*