---
product_id: 61328793
title: "UPANBIKE Aluminum Alloy 25.4mm 27.2mm 28.6mm 31.6mm Bike Seat Post Length 350mm Black for Mountain Bike Fixed Gear Bike Seatpost"
brand: "upanbike"
price: "$28.94"
currency: USD
in_stock: true
reviews_count: 13
url: https://www.desertcart.us/products/61328793-upanbike-aluminum-alloy-25-4mm-27-2mm-28-6mm-31
store_origin: US
region: United States of America
---

# Length: 350mm 6061 Aluminum Alloy Diameter: 25.4mm UPANBIKE Aluminum Alloy 25.4mm 27.2mm 28.6mm 31.6mm Bike Seat Post Length 350mm Black for Mountain Bike Fixed Gear Bike Seatpost

**Brand:** upanbike
**Price:** $28.94
**Availability:** ✅ In Stock

## Summary

> 🚲 Ride in Style and Safety!

## Quick Answers

- **What is this?** UPANBIKE Aluminum Alloy 25.4mm 27.2mm 28.6mm 31.6mm Bike Seat Post Length 350mm Black for Mountain Bike Fixed Gear Bike Seatpost by upanbike
- **How much does it cost?** $28.94 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/61328793-upanbike-aluminum-alloy-25-4mm-27-2mm-28-6mm-31)

## Best For

- upanbike enthusiasts

## Why This Product

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

## Key Features

- • **🔒 Safety First:** Equipped with a safety line mark to ensure secure installation.
- • **🖤 Sleek Aesthetic:** Classic black finish that complements any bike style.
- • **🛠️ Universal Fit:** Compatible with most old-style bikes and saddle clamps for versatile use.
- • **⚡ Lightweight Performance:** Weighing only 170g, it enhances agility without compromising strength.
- • **🚴‍♂️ Elevate Your Ride:** Transform your biking experience with a robust and lightweight seat post.

## Overview

The UPANBIKE Aluminum Alloy Bike Seat Post is a durable and lightweight solution for mountain and fixed gear bikes. Measuring 350mm in length and 25.4mm in diameter, this seat post is crafted from high-quality 6061 aluminum alloy, ensuring both strength and performance. Designed for compatibility with most old-style bikes, it features a safety line mark for secure installation. Upgrade your biking experience with this essential component!

## Description

UPANBIKE Aluminum Alloy 25.4mm 27.2mm 28.6mm 31.6mm Bike Seat Post Length 350mm Black for Mountain Bike Fixed Gear Bike Seatpost

## Features

- 【MATERIAL】Seatpost made of 6061 aluminum alloy,strong and durable.
- 【SIZE】Length:350mm;Diameter:25.4mm;Thickness of the tube:3mm.
- 【USE&FIT】Seatpost used for for most old style bike,and the bike saddle with clamp.
- 【SAFE LINE MARK】There is a safe line mark on the seat post. Please insert at least above the minimum safety line.
- 【PAY ATTENTION】Please do measure the actual required diameter before purchasing. Saddle clamp is not included, please buy the saddle clamp separately if needed.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Bike type | Mountain Bike |
| Color | Black |
| Size | 25.4mm*350mm |
| Material type | Aluminium |
| Batteries included? | No |
| Brand | UPANBIKE |
| Manufacturer | UPANTECH |
| Manufacturer reference | 50-188 |
| Package Dimensions | 36.5 x 5.7 x 3.7 cm; 170 g |
| ASIN | B0789FK58M |

## Product Details

- **Colour:** Black
- **Material:** Aluminium
- **Brand:** UPANBIKE
- **Bike type:** Mountain Bike
- **Manufacturer:** UPANTECH

## Images

![UPANBIKE Aluminum Alloy 25.4mm 27.2mm 28.6mm 31.6mm Bike Seat Post Length 350mm Black for Mountain Bike Fixed Gear Bike Seatpost - Image 1](https://m.media-amazon.com/images/I/51nTqJBmEiL.jpg)
![UPANBIKE Aluminum Alloy 25.4mm 27.2mm 28.6mm 31.6mm Bike Seat Post Length 350mm Black for Mountain Bike Fixed Gear Bike Seatpost - Image 2](https://m.media-amazon.com/images/I/613mnEYCzVL.jpg)
![UPANBIKE Aluminum Alloy 25.4mm 27.2mm 28.6mm 31.6mm Bike Seat Post Length 350mm Black for Mountain Bike Fixed Gear Bike Seatpost - Image 3](https://m.media-amazon.com/images/I/41D6zLqrXlL.jpg)
![UPANBIKE Aluminum Alloy 25.4mm 27.2mm 28.6mm 31.6mm Bike Seat Post Length 350mm Black for Mountain Bike Fixed Gear Bike Seatpost - Image 4](https://m.media-amazon.com/images/I/41J+YX5FnTL.jpg)
![UPANBIKE Aluminum Alloy 25.4mm 27.2mm 28.6mm 31.6mm Bike Seat Post Length 350mm Black for Mountain Bike Fixed Gear Bike Seatpost - Image 5](https://m.media-amazon.com/images/I/51m6BYuSonL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Perfect
  

*by A***C on Reviewed in the United Kingdom on 25 February 2024*

Well made and perfect fitSeams very durable and good quality 👍🏻

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Upanbike Alloy Seatpost, better than I remembered
  

*by P***Y on Reviewed in the United Kingdom on 7 January 2019*

I am VERY happy with this purchase (however, I should qualify that by pointing out that at this time of writing I haven’t yet fitted this to my bike so I have given a four star rating rather than five).I like the weight (it’s very light).The graphics mean It’s very attractive. My only gripe is that I think the measurement scale should run at least an inch (25.4mm) higher and preferrably two inches.To match my bike I wanted the Seatpost to be a bit more shiny/glossy so I sprayed it with lacquer.There’s not much more to say about such a basic product.UPDATE (2021.03.27)I like this product even more now, because today for the first time in over two years I had to remove the seatpost. I was VERY VERY surprised to find that there wasn't a shim in the seat tube; you see, my seat tube is made for 28.6mm seatposts which means that posts are either too big or they are much smaller (usually 27.2 mm) and require a shim which I don't like using coz the vast majority are poorly designed (either too short to run down past the top tube, as they should for proper support, or slightly the wrong size (contrary to their written specs) or they don't have a slit so that they pinch nicely when you tighten the seatpost clamp).The seatpost I bought (and I had forgotten this) was exactly the right size, 28.6 mm. So I came back here to Amazon to check and found that this seatpost is made in ALL of the common sizes, so pretty much any bike you have can be supported by one of these seatposts. That's great.It's also a testimony to the product that I had forgotten what its specs were; in other words, it's a product that nicely gets on with doing the job for which it was intended without annoyingly drawing attention to itself.I am now gonna increase my review score from 4 stars to 5 stars.

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    Great seat post
  

*by M***W on Reviewed in the United Kingdom on 2 May 2018*

Good quality aluminium seat post, with a tough black finish, and - nicely - a centimetre scale printed on it, so that you can adjust it, then put it back to where it was before!

---

## 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.us/products/61328793-upanbike-aluminum-alloy-25-4mm-27-2mm-28-6mm-31](https://www.desertcart.us/products/61328793-upanbike-aluminum-alloy-25-4mm-27-2mm-28-6mm-31)

---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-01-28*