---
product_id: 261005990
title: "UPANBIKE Bike Bicycle MTB Replacement Extra Long Seatpost Seat Post 17.7inch (450mm) φ 25.4 27.2 28.6 30.4 30.9 31.6mm"
brand: "upanbike"
price: "€ 52.02"
currency: EUR
in_stock: false
reviews_count: 6
category: "Upanbike"
url: https://www.desertcart.ie/products/261005990-upanbike-bike-bicycle-mtb-replacement-extra-long-seatpost-seat-post
store_origin: IE
region: Ireland
---

# 450mm extra long length Adjustable saddle tilt clamp 6061 T6 aluminum durable build UPANBIKE Bike Bicycle MTB Replacement Extra Long Seatpost Seat Post 17.7inch (450mm) φ 25.4 27.2 28.6 30.4 30.9 31.6mm

**Brand:** upanbike
**Price:** € 52.02
**Availability:** ❌ Out of Stock

## Summary

> 🚴‍♂️ Elevate your ride, dominate every trail!

## Quick Answers

- **What is this?** UPANBIKE Bike Bicycle MTB Replacement Extra Long Seatpost Seat Post 17.7inch (450mm) φ 25.4 27.2 28.6 30.4 30.9 31.6mm by upanbike
- **How much does it cost?** € 52.02 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/261005990-upanbike-bike-bicycle-mtb-replacement-extra-long-seatpost-seat-post)

## 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

- • **Custom Comfort Angle:** Adjustable clamp lets you fine-tune your saddle tilt for maximum riding comfort and control.
- • **Ride Tall, Ride Proud:** Extra-long 17.7-inch seatpost elevates your saddle for a perfect ergonomic fit—no more bending forward.
- • **Universal Compatibility:** Fits most mountain, road, and hybrid bikes with multiple diameter options from 25.4mm to 31.6mm.
- • **Precision Fit Every Time:** True-to-size diameters with slight undersizing ensure a snug, slip-free insertion into your bike frame.
- • **Built to Last, Light to Carry:** Crafted from premium 6061 T6 aluminum for unbeatable strength without the weight penalty.

## Overview

The UPANBIKE MTB Replacement Seatpost is a 450mm extra-long, lightweight aluminum seatpost designed for tall riders seeking ergonomic comfort. Featuring precise diameter sizing for a secure fit and an adjustable saddle clamp, it fits a wide range of bike types and frame sizes, delivering durable performance and customizable comfort.

## Description

Note: The diameter number is for frame seatpost hole, the seatpost measures a little smaller than the diameter number marked on the seatpost. e.g.: a 25.4mm seatpost measures about 25.0mm~25.2mm only, not exactly 25.4mm. Replacement Seatpost, extended extra long length. Material : 6061 T6 Aluminum Length: 450mm Tube Outter diameter: 25.4mm, 27.2mm,28.6mm,30.4mm,30.8mm,31.6mm Package includes: 1 seatpost

Review: Cheap and Good - You get what you paid for. Looks cheap but it gets the job done. Ive been using this for 2 years. No problem or whatsoever. Its good seatpost
Review: The seat post is long 450mm 30.9 diameter and light. The matte finish grips into the seat tube perfectly so no slip.. There’s a graduation on the back so it’s easy to set back to your favourite height. I have mine set at 5 for street and 2 for off road. The seat clamp was easy to set and only one bolt. Only drawback is the prominent logo “upanbike”. Nothing screams “performance” quite like upanbike. All in all it’s good value. Im 6-4 with about a 40” pedal reach.

## Features

- To fit frame seatpost hole:30.4mm
- Important note: real measure of the seatpost diameter is a little smaller than the number marks on it. e.g.:25.4mm one may measures about 25.0~25.2mm only
- Extra long: 17.7" (45cm); Help to raise height of saddle, so that tall rider don't have to bent much forward
- Replacement seatpost for most bike, mountain bike, road bike, universal bikes
- Clamp is adjustable for the saddle tilt angle

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07235VJ52 |
| Batteries Included? | No |
| Bike Type | Mountain Bike |
| Brand | UPANBIKE |
| Color | Black 450*30.4mm |
| Customer Reviews | 4.6 4.6 out of 5 stars (794) |
| Date First Available | 18 May 2018 |
| Is Discontinued By Manufacturer | No |
| Manufacturer | UPANTECH |
| Manufacturer reference | 50-128-3 |
| Material Type | Aluminum |
| Product Dimensions | 3.05 x 3.05 x 45.01 cm; 449 g |
| Size | 30.4*450mm |

## Product Details

- **Brand:** UPANBIKE
- **Colour:** Black 450*30.4mm
- **Manufacturer:** UPANTECH
- **Material:** Aluminum
- **UPC:** 761560662052

## Images

![UPANBIKE Bike Bicycle MTB Replacement Extra Long Seatpost Seat Post 17.7inch (450mm) φ 25.4 27.2 28.6 30.4 30.9 31.6mm - Image 1](https://m.media-amazon.com/images/I/51-ZZdv2rBS.jpg)
![UPANBIKE Bike Bicycle MTB Replacement Extra Long Seatpost Seat Post 17.7inch (450mm) φ 25.4 27.2 28.6 30.4 30.9 31.6mm - Image 2](https://m.media-amazon.com/images/I/51jLTL8bdUL.jpg)
![UPANBIKE Bike Bicycle MTB Replacement Extra Long Seatpost Seat Post 17.7inch (450mm) φ 25.4 27.2 28.6 30.4 30.9 31.6mm - Image 3](https://m.media-amazon.com/images/I/61fffLiQceS.jpg)
![UPANBIKE Bike Bicycle MTB Replacement Extra Long Seatpost Seat Post 17.7inch (450mm) φ 25.4 27.2 28.6 30.4 30.9 31.6mm - Image 4](https://m.media-amazon.com/images/I/61l0ryzHfqS.jpg)
![UPANBIKE Bike Bicycle MTB Replacement Extra Long Seatpost Seat Post 17.7inch (450mm) φ 25.4 27.2 28.6 30.4 30.9 31.6mm - Image 5](https://m.media-amazon.com/images/I/717DJjbybxS.jpg)

## Customer Reviews

### ⭐⭐⭐⭐ Cheap and Good
*by R***L on 23 November 2023*

You get what you paid for. Looks cheap but it gets the job done. Ive been using this for 2 years. No problem or whatsoever. Its good seatpost

### ⭐⭐⭐⭐⭐ Review
*by G***Y on 28 May 2023*

The seat post is long 450mm 30.9 diameter and light. The matte finish grips into the seat tube perfectly so no slip.. There’s a graduation on the back so it’s easy to set back to your favourite height. I have mine set at 5 for street and 2 for off road. The seat clamp was easy to set and only one bolt. Only drawback is the prominent logo “upanbike”. Nothing screams “performance” quite like upanbike. All in all it’s good value. Im 6-4 with about a 40” pedal reach.

### ⭐⭐⭐⭐ Review
*by S***R on 14 January 2021*

Does what it supposed to do

## Frequently Bought Together

- UPANBIKE Bike Seat Post Aluminum Alloy Extra Long 17.7inch(450mm) Replacement Bicycle Seatpost φ 25.4 27.2 28.6 30.4 30.9 31.6mm
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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-05*