---
product_id: 62896674
title: "Big Roc 57SATB12GN Stem, 28.6X50Mm, 31.8mm Bore, 25.4mm Adaptor, Alloy Green"
brand: "big rock tools"
price: "A$51"
currency: AUD
in_stock: true
reviews_count: 4
url: https://www.desertcart.com.au/products/62896674-big-roc-57satb12gn-stem-28-6x50mm-31-8mm-bore-25
store_origin: AU
region: Australia
---

# Versatile 31.8mm bore + 25.4mm adaptor Striking alloy green finish 28.6x50mm precision fit Big Roc 57SATB12GN Stem, 28.6X50Mm, 31.8mm Bore, 25.4mm Adaptor, Alloy Green

**Brand:** big rock tools
**Price:** A$51
**Availability:** ✅ In Stock

## Summary

> 🚴‍♂️ Elevate your ride with precision and style — don’t just ride, dominate!

## Quick Answers

- **What is this?** Big Roc 57SATB12GN Stem, 28.6X50Mm, 31.8mm Bore, 25.4mm Adaptor, Alloy Green by big rock tools
- **How much does it cost?** A$51 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/62896674-big-roc-57satb12gn-stem-28-6x50mm-31-8mm-bore-25)

## Best For

- big rock tools enthusiasts

## Why This Product

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

## Key Features

- • **Lightweight Yet Robust:** Crafted from premium alloy, this stem balances strength and minimal weight for agile handling.
- • **Trusted Brand Reliability:** Manufactured by Big Roc, a global leader known for precision and durability in cycling components.
- • **Bold Alloy Green Aesthetic:** Stand out on every ride with a vibrant, durable green finish that signals quality and style.
- • **Dual Compatibility Adaptor:** Seamlessly switch between 31.8mm and 25.4mm bars with the included adaptor—versatility meets convenience.
- • **Precision Fit for Peak Performance:** Optimized 28.6 x 50 mm dimensions ensure a secure, responsive connection to your handlebars.

## Overview

The Big Roc 57SATB12GN Stem is a high-quality alloy bicycle stem featuring a 28.6 x 50 mm size, a 31.8 mm handlebar bore with a 25.4 mm adaptor for versatile compatibility, and a standout green finish. Designed for durability and lightweight performance, it’s engineered by Big Roc to enhance control and aesthetics for serious cyclists.

## Description

Br tools provides quality products around the world. We work closely with our manufacturing facilities to design and produce everyday products that make your life better.

## Features

- Material: alloy
- Ext: 28.6 x 50 mm
- Bar bore: 31.8 mm
- w/25.4mm adaptor
- Color: Green

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Big Roc |
| Brand | BIG ROCK TOOLS |
| Item Weight | 1 pounds |
| Product Dimensions | 2 x 9 x 6 inches |
| Item model number | 57SATB12GN |
| Manufacturer Part Number | 57SATB12GN |

## Images

![Big Roc 57SATB12GN Stem, 28.6X50Mm, 31.8mm Bore, 25.4mm Adaptor, Alloy Green - Image 1](https://m.media-amazon.com/images/I/51cqTE6uY3L.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    Actually a great looking stem and a totally affordable price
  

*by S***N on Reviewed in the United States on August 12, 2017*

Actually a great looking stem and a totally affordable price. I meant to weigh it before I mounted it up, but forgot. It did not seem out of line heavy though. It is not really black, but a cool looking dark gray. Bolts threaded without a problem and fork steer tube and handlebars fit without a problem.really great product for generic

### ⭐⭐⭐⭐⭐ 







  
  
    Great stem for the price!
  

*by W***. on Reviewed in the United States on July 24, 2018*

This is a very stem! Much better quality that I assumed it would be from the price. If your on the bench about it just go for it, it’s a no brained at this price.

### ⭐⭐⭐ 







  
  
    It’s cheap
  

*by S***R on Reviewed in the United States on April 6, 2020*

I didn’t trust it enough to keep it on my bike

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**Shop now:** [https://www.desertcart.com.au/products/62896674-big-roc-57satb12gn-stem-28-6x50mm-31-8mm-bore-25](https://www.desertcart.com.au/products/62896674-big-roc-57satb12gn-stem-28-6x50mm-31-8mm-bore-25)

---

*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-03-07*