---
product_id: 631493650
title: "Motorcycle Silver 21.1mm (0.83\") Aluminum Threadless QUILL STEM Adapter Bike Bicycle"
brand: "motorcycle"
price: "¥8008"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/631493650-motorcycle-silver-21-1mm-0-83-aluminum-threadless-quill-stem
store_origin: JP
region: Japan
---

# 28.6mm OD 21.1mm ID Aluminum Alloy Motorcycle Silver 21.1mm (0.83") Aluminum Threadless QUILL STEM Adapter Bike Bicycle

**Brand:** motorcycle
**Price:** ¥8008
**Availability:** ✅ In Stock

## Summary

> 🚴‍♂️ Upgrade Your Adventure with Style!

## Quick Answers

- **What is this?** Motorcycle Silver 21.1mm (0.83") Aluminum Threadless QUILL STEM Adapter Bike Bicycle by motorcycle
- **How much does it cost?** ¥8008 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/631493650-motorcycle-silver-21-1mm-0-83-aluminum-threadless-quill-stem)

## Best For

- motorcycle enthusiasts

## Why This Product

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

## Key Features

- • **Easy Installation:** Quick and hassle-free setup to get you back on the road.
- • **Elevate Your Ride:** Transform your bike's performance with this lightweight aluminum adapter.
- • **Durable & Lightweight:** Crafted from high-quality aluminum for strength without the weight.
- • **Precision Engineering:** Designed for a perfect fit with a 21.1mm inner diameter.
- • **Versatile Compatibility:** Seamlessly integrates with 1 1/8" stem clamps.

## Overview

The Motorcycle Silver 21.1mm Aluminum Threadless Quill Stem Adapter is a high-quality, lightweight solution designed to enhance your bike's performance. With a precise 21.1mm inner diameter and compatibility with 1 1/8" stem clamps, this adapter is perfect for cyclists looking to elevate their ride. Made from durable aluminum alloy, it ensures both strength and ease of installation, making it an essential upgrade for any biking enthusiast.

## Description

Motorcycle Silver 21.1mm (0.83") Aluminum Threadless QUILL STEM Adapter Bike Bicycle

## Features

- Aluminum Threadless Quill Stem Adapter (For Ahead)
- Fork Steerer Inside Diameter: 21.1mm/ 0.83"
- Ahead Diameter (Stem Clamp): 28.6mm (1 1/8")
- 28.6mm (Upper part) tap down to 21.1mm (Lower part)
- Aluminum Alloy

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Frame Material | Aluminum |
| Material Type | Aluminum |
| Brand | Motorcycle |
| Manufacturer | Motorcycle |
| Manufacturer reference | Motorcycle |
| Package Dimensions | 14.99 x 2.54 x 2.54 cm; 154.22 g |
| ASIN | B08P1JPP4Y |

## Images

![Motorcycle Silver 21.1mm (0.83") Aluminum Threadless QUILL STEM Adapter Bike Bicycle - Image 1](https://m.media-amazon.com/images/I/71REkoqnJ2L.jpg)

## Frequently Bought Together

- Silver 21.1mm (0.83") Aluminum Threadless QUILL STEM Adapter Bike Bicycle
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- 31.8 Stem 45mm Bike Stem Wake Mountain Bike Stem Short Handlebar Stem for Most Bicycle, Road Bike, MTB, BMX, Fixie Gear, Cycling (Aluminum Alloy, Black Blue Gold Red)

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**Shop now:** [https://www.desertcart.jp/products/631493650-motorcycle-silver-21-1mm-0-83-aluminum-threadless-quill-stem](https://www.desertcart.jp/products/631493650-motorcycle-silver-21-1mm-0-83-aluminum-threadless-quill-stem)

---

*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-14*