---
product_id: 43252157
title: "Big Roc 57SATB12P Stem, 28.6X50Mm, 31.8mm Bore, 25.4mm Adaptor, Alloy Purple"
brand: "big rock tools"
price: "€ 77.49"
currency: EUR
in_stock: true
reviews_count: 9
url: https://www.desertcart.sk/products/43252157-big-roc-57satb12p-stem-28-6x50mm-31-8mm-bore-25
store_origin: SK
region: Slovakia
---

# Durable lightweight alloy in standout purple 31.8mm bore with 25.4mm adaptor 28.6x50mm precision fit Big Roc 57SATB12P Stem, 28.6X50Mm, 31.8mm Bore, 25.4mm Adaptor, Alloy Purple

**Brand:** big rock tools
**Price:** € 77.49
**Availability:** ✅ In Stock

## Summary

> 💜 Ride Bold, Ride Precise – The Purple Power Stem You Can't Miss!

## Quick Answers

- **What is this?** Big Roc 57SATB12P Stem, 28.6X50Mm, 31.8mm Bore, 25.4mm Adaptor, Alloy Purple by big rock tools
- **How much does it cost?** € 77.49 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/43252157-big-roc-57satb12p-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

- • **Versatile Compatibility:** 31.8 mm bore with a 25.4 mm adaptor lets you effortlessly upgrade or customize your setup without compromise.
- • **Stand Out with Bold Purple:** Make your bike uniquely yours with a vibrant purple finish that signals confidence and style on every ride.
- • **Lightweight Yet Rugged Alloy:** Crafted from premium alloy, this stem balances strength and weight for agile handling and long-lasting durability.
- • **Trusted Quality from Big Roc:** Backed by a global brand known for precision and reliability, ensuring your gear performs as hard as you do.
- • **Precision Fit for Peak Performance:** Optimized 28.6 x 50 mm dimensions ensure a secure, vibration-free connection for your bike's handlebar.

## Overview

The Big Roc 57SATB12P Stem is a high-quality bicycle stem crafted from durable alloy, featuring a 28.6 x 50 mm size with a 31.8 mm bore and a 25.4 mm adaptor for versatile handlebar compatibility. Its lightweight design and striking purple color make it a stylish and reliable upgrade for cycling enthusiasts seeking performance and individuality.

## 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: Purple

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Big Roc |
| Brand | BIG ROCK TOOLS |
| Item Weight | 7.5 ounces |
| Product Dimensions | 2 x 9 x 6 inches |
| Item model number | 57SATB12P |
| Manufacturer Part Number | 57SATB12P |

## Images

![Big Roc 57SATB12P Stem, 28.6X50Mm, 31.8mm Bore, 25.4mm Adaptor, Alloy Purple - Image 1](https://m.media-amazon.com/images/I/61+IoU9yn0L.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    Orange stem
  

*by A***R on Reviewed in the United States 🇺🇸 on November 20, 2021*

Goes good with my neon orange bike. I also purchased orange pedals.

### ⭐⭐⭐⭐⭐ 







  
  
    Fits perfectly and the adapter works super well!
  

*by W***. on Reviewed in the United States 🇺🇸 on May 14, 2020*

I'm a shorter guy and needed to pull my stem in quite a bit to give me a more upright riding position. This stem did just the trick and fits the aesthetic of my bike really well. The adapter works great and holds my 25.4mm bars in place, even putting my full weight on them - no slipping whatsoever!

### ⭐⭐⭐⭐ 







  
  
    works well for a commuter bike.
  

*by K***H on Reviewed in the United States 🇺🇸 on June 16, 2014*

I bought this stem to account for a gary fisher paragon 29er's exceptionally long top tube.  I have a 25.4 diameter handlebar and the shims to make it fit (it is designed for 31.8) work great!.  No complaints for this stem.  paint seems to be of good quality and no problems with slippage.

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**Shop now:** [https://www.desertcart.sk/products/43252157-big-roc-57satb12p-stem-28-6x50mm-31-8mm-bore-25](https://www.desertcart.sk/products/43252157-big-roc-57satb12p-stem-28-6x50mm-31-8mm-bore-25)

---

*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-03-12*