---
product_id: 50763959
title: "M:Part Threadless Shim Stem Adapter 1-18in 28.6mm - 1in25.4mm - Black, 28.6-25.4 Bike part"
brand: "m part"
price: "$U1406"
currency: UYU
in_stock: true
url: https://www.desertcart.uy/products/50763959-m-part-threadless-shim-stem-adapter-1-18in-28-6mm
store_origin: UY
region: Uruguay
---

# Sleek black finish Fits 25.4mm to 28.6mm Aluminium construction M:Part Threadless Shim Stem Adapter 1-18in 28.6mm - 1in25.4mm - Black, 28.6-25.4 Bike part

**Brand:** m part
**Price:** $U1406
**Availability:** ✅ In Stock

## Summary

> 🚴‍♂️ Elevate Your Cycling Game!

## Quick Answers

- **What is this?** M:Part Threadless Shim Stem Adapter 1-18in 28.6mm - 1in25.4mm - Black, 28.6-25.4 Bike part by m part
- **How much does it cost?** $U1406 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/50763959-m-part-threadless-shim-stem-adapter-1-18in-28-6mm)

## Best For

- m part enthusiasts

## Why This Product

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

## Key Features

- • **Durable Design:** Crafted from high-quality aluminium for long-lasting performance.
- • **Sleek Aesthetics:** Features a stylish black anodised finish with precision laser etching.
- • **Transform Your Ride:** Easily adapt your steerer tube from 25.4mm to 28.6mm for enhanced compatibility.
- • **Lightweight Innovation:** Weighs only 40.82g, ensuring minimal impact on your bike's overall weight.
- • **Versatile Compatibility:** Unlock a wider selection of stems designed for 1-1/8 inch steerer tubes.

## Overview

The M Part Cycling SPT100 Threadless Shim Stem Adapter is a precision-engineered accessory that allows cyclists to convert a 25.4mm steerer tube to a 28.6mm size. Made from durable aluminium, this lightweight shim features a sleek black anodised finish and is designed for optimal compatibility with a variety of stems, enhancing your cycling experience.

## Description

M:Part Threadless Shim Stem Adapter 1-18in 28.6mm - 1in25.4mm - Black, 28.6-25.4 Bike part

## Features

- A split aluminium shim that fits over a 25.4 mm (1 inch) steerer tube changing the outer dimension to 28.6 mm (1-1/8 inch)
- Allows the use of a stem designed to fit 1-1/8 inch steerer tubes where greater choice is available
- Black anodised finish with laser etched detail
- 1in - 1-1/8in (25.4mm - 28.6mm)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Color | Black |
| Size | One Size |
| Style | Spares |
| Material composition | Alloy |
| Material type | Aluminium |
| Sport | Cycling |
| Brand | M Part |
| Department | Cycling |
| Manufacturer | Madison |
| Item model number | SPT100 |
| Product Dimensions | 3 x 2.54 x 0.1 cm; 40.82 g |
| ASIN | B000NORTAM |

## Product Details

- **Colour:** Black
- **Brand:** M Part
- **Product dimensions:** 30L x 25W millimetres
- **Manufacturer:** Madison
- **Global Trade Identification Number:** 05027726021664

## Images

![M:Part Threadless Shim Stem Adapter 1-18in 28.6mm - 1in25.4mm - Black, 28.6-25.4 Bike part - Image 1](https://m.media-amazon.com/images/I/71OfXk-TfdL.jpg)

## Frequently Bought Together

- M Part Cycling Spt100 M Part Threadless Shim Stem Adapter 1 18in 28 6mm 1in25 4mm Black 6 25 4, Black, O S UK
- GoHZQ 6 Pcs Headset Spacers 1 1/8", Aluminium Alloy Headset Spacers for Bikes, 28.6mm MTB Road Bike Stem Spacers 2mm/3mm/5mm/3x10mm Black
- Deda Elementi Men's Spada Quill Stem Adapter, Black, 22.2mm / 25.4mm

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.uy/products/50763959-m-part-threadless-shim-stem-adapter-1-18in-28-6mm](https://www.desertcart.uy/products/50763959-m-part-threadless-shim-stem-adapter-1-18in-28-6mm)

---

*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-03-15*