---
product_id: 47775275
title: "UPANBIKE Bike Seatpost Aluminum Alloy Adjustable Seat Post 400mm Length Diameter 25.4/27.2/28.6//30.9/31.6mm for Mountain Bike Road Bicycle"
brand: "upanbike"
price: "VT8638"
currency: VUV
in_stock: true
url: https://www.desertcart.vu/products/47775275-upanbike-bike-seatpost-aluminum-alloy-adjustable-seat-post-400mm-length
store_origin: VU
region: Vanuatu
---

# Adjustable Diameter 400mm Length Lightweight Alloy UPANBIKE Bike Seatpost Aluminum Alloy Adjustable Seat Post 400mm Length Diameter 25.4/27.2/28.6//30.9/31.6mm for Mountain Bike Road Bicycle

**Brand:** upanbike
**Price:** VT8638
**Availability:** ✅ In Stock

## Summary

> 🚴‍♂️ Elevate Your Ride, Embrace the Adventure!

## Quick Answers

- **What is this?** UPANBIKE Bike Seatpost Aluminum Alloy Adjustable Seat Post 400mm Length Diameter 25.4/27.2/28.6//30.9/31.6mm for Mountain Bike Road Bicycle by upanbike
- **How much does it cost?** VT8638 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/47775275-upanbike-bike-seatpost-aluminum-alloy-adjustable-seat-post-400mm-length)

## 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

- • **Sleek Design:** With a minimalist aesthetic, this seatpost not only performs well but also enhances the overall look of your bike.
- • **Universal Fit:** Designed to replace seatposts on most mountain and road bikes, making it the go-to choice for versatile cyclists.
- • **Elevate Your Ride:** Transform your biking experience with an extra-long 400mm seatpost, perfect for tall riders seeking comfort.
- • **Durable Yet Lightweight:** Crafted from strong aluminum alloy, this seatpost combines durability with a feather-light feel for effortless rides.
- • **Precision Adjustability:** Micro-adjustable clamp allows for precise tilt angle adjustments, ensuring your saddle is always perfectly horizontal.

## Overview

The UPANBIKE Bike Seatpost is a versatile and adjustable aluminum alloy seatpost designed for mountain and road bikes. With a length of 400mm and compatibility with various diameters (25.4/27.2/28.6/30.9/31.6mm), it offers a perfect fit for tall riders seeking comfort and performance. The micro-adjustable clamp allows for precise saddle positioning, ensuring an optimal riding experience.

## Description

UPANBIKE Bike Seatpost Aluminum Alloy Adjustable Seat Post 400mm Length Diameter 25.4/27.2/28.6//30.9/31.6mm for Mountain Bike Road Bicycle

## Features

- To fit frame seatpost hole:27.2mm..(Please do measure the actual required diameter before purchasing).
- Extra long:15.7"(400mm);Help to raise height of saddle,so that tall rider don't have to bent much forward.
- Material:Strong aluminum alloy,tube thickness:2.05~3.05mm,durable and light weight.
- Micro adjustable clamp:you can adjust the tilt angle of the saddle via the clamp to make the saddle horizontal.
- Replacement seatpost for most bike,such as:mountain bike,road bike,and other universal bikes.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Product Dimensions | 1.07"W x 15.75"H |
| Manufacturer | UPANTECH |
| Item Package Dimensions L x W x H | 16.54 x 2.91 x 2.05 inches |
| Package Weight | 0.3 Kilograms |
| Item Dimensions  LxWxH | 1.07 x 1.07 x 15.75 inches |
| Brand Name | UPANBIKE |
| Part Number | 50-187-1-1 |
| Outer Material | aluminum-alloy |

## Product Details

- **Color:** 27.2mm*black
- **Item Weight:** 10.72 ounces
- **Material:** Aluminum
- **Brand:** UPANBIKE
- **Bike Type:** Mountain Bike

## Images

![UPANBIKE Bike Seatpost Aluminum Alloy Adjustable Seat Post 400mm Length Diameter 25.4/27.2/28.6//30.9/31.6mm for Mountain Bike Road Bicycle - Image 1](https://m.media-amazon.com/images/I/51EBaC-LIzS.jpg)
![UPANBIKE Bike Seatpost Aluminum Alloy Adjustable Seat Post 400mm Length Diameter 25.4/27.2/28.6//30.9/31.6mm for Mountain Bike Road Bicycle - Image 2](https://m.media-amazon.com/images/I/51hHQ3YER5S.jpg)
![UPANBIKE Bike Seatpost Aluminum Alloy Adjustable Seat Post 400mm Length Diameter 25.4/27.2/28.6//30.9/31.6mm for Mountain Bike Road Bicycle - Image 3](https://m.media-amazon.com/images/I/61cmygs2U9L.jpg)
![UPANBIKE Bike Seatpost Aluminum Alloy Adjustable Seat Post 400mm Length Diameter 25.4/27.2/28.6//30.9/31.6mm for Mountain Bike Road Bicycle - Image 4](https://m.media-amazon.com/images/I/61TOfqUg57L.jpg)
![UPANBIKE Bike Seatpost Aluminum Alloy Adjustable Seat Post 400mm Length Diameter 25.4/27.2/28.6//30.9/31.6mm for Mountain Bike Road Bicycle - Image 5](https://m.media-amazon.com/images/I/71awyBF6NyS.jpg)

## Available Options

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

## Frequently Bought Together

- UPANBIKE Bike Seatpost Aluminum Alloy Adjustable Seat Post 400mm Length Diameter 25.4/27.2/28.6//30.9/31.6mm for Mountain Bike Road Bicycle
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**Shop now:** [https://www.desertcart.vu/products/47775275-upanbike-bike-seatpost-aluminum-alloy-adjustable-seat-post-400mm-length](https://www.desertcart.vu/products/47775275-upanbike-bike-seatpost-aluminum-alloy-adjustable-seat-post-400mm-length)

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-01-24*