---
product_id: 366006822
title: "PLATT Bicycle Seatpost Shim Aluminum Alloy Bike Seat Post Tube Adapter"
brand: "platt"
price: "$23.03"
currency: USD
in_stock: true
url: https://www.desertcart.us/products/366006822-platt-bicycle-seatpost-shim-aluminum-alloy-bike-seat-post-tube
store_origin: US
region: United States of America
---

# Lightweight, corrosion-resistant aluminum alloy 27.2mm to 33.9mm fit adapter 100mm extended length for superior support PLATT Bicycle Seatpost Shim Aluminum Alloy Bike Seat Post Tube Adapter

**Brand:** platt
**Price:** $23.03
**Availability:** ✅ In Stock

## Summary

> 🚴‍♂️ Upgrade your ride, not your gear—fit, strength, and style in one sleek shim!

## Quick Answers

- **What is this?** PLATT Bicycle Seatpost Shim Aluminum Alloy Bike Seat Post Tube Adapter by platt
- **How much does it cost?** $23.03 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/366006822-platt-bicycle-seatpost-shim-aluminum-alloy-bike-seat-post-tube)

## Best For

- platt enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Crafted from premium aluminum alloy for unmatched strength and anti-corrosion durability.
- • **Seamless Size Upgrade:** Effortlessly convert your 27.2mm seatpost to fit a 33.9mm frame—no new seatpost needed.
- • **Extended Support Length:** 100mm shim length offers enhanced stability and secure seatpost fit inside your frame.
- • **Lightweight Performance:** Adds minimal weight while maximizing your bike’s comfort and ride quality.
- • **Universal Compatibility:** Perfect for mountain bikes, eliminating the hassle of repurchasing seatposts when upgrading frames.

## Overview

The PLATT Bicycle Seatpost Shim is a high-quality aluminum alloy adapter designed to convert a 27.2mm seatpost to fit a 33.9mm bike frame. Measuring 100mm in length, it provides superior support and durability while being lightweight and corrosion-resistant, making it an essential upgrade for mountain bike enthusiasts seeking a hassle-free fit solution.

## Description

Full description not available

## Features

- MATERIAL:This Bike Seatpost Shim is Made of High Quality Aluminum Alloy, it is Lightweight,Strong ,Durable and Great Anti-corrosion.
- SIZE: 27.2 to 33.9 ，Use this Bicycle Seatpost Shim,The 27.2 Seatpost can be converted into the 33.9 Seatpost.
- LEGHTH: 100mm , Our shims are made to 100mm length and are longer than other shims on the market, giving your seat post much better support inside the frame.
- TIP:Please Check or Measure the O.D of the Original Seatpost, OR Measure the I.D of the Bike Frame Seat Tube.Then make a Right Choice.
- APPLICATION:This Seatpost Shim can easily adjust the diameter of the bicycle seat post to fit a larger frame , eliminating the trouble of repurchasing the bike seatpost.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| UPC | 721703542344 |
| Bike type | Mountain Bike |
| Color | Black |
| Size | 27.2 I.D/33.9 O.D |
| Material type | Aluminium |
| Batteries included? | No |
| Item model number | ZUK-057 |
| Package Dimensions | 27.6 x 18 x 11.6 cm; 60 g |
| ASIN | B0965F1BB4 |

## Product Details

- **Colour:** Black
- **Item weight:** 0.06 Kilograms
- **Material:** Aluminium
- **Brand:** PLATT
- **Manufacturer:** PLATT

## Images

![PLATT Bicycle Seatpost Shim Aluminum Alloy Bike Seat Post Tube Adapter - Image 1](https://m.media-amazon.com/images/I/61adAe6VX+S.jpg)

## Available Options

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

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**Shop now:** [https://www.desertcart.us/products/366006822-platt-bicycle-seatpost-shim-aluminum-alloy-bike-seat-post-tube](https://www.desertcart.us/products/366006822-platt-bicycle-seatpost-shim-aluminum-alloy-bike-seat-post-tube)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-10-06*