---
product_id: 85828697
title: "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"
brand: "upanbike"
price: "€ 39.90"
currency: EUR
in_stock: true
reviews_count: 10
url: https://www.desertcart.pt/products/85828697-bike-seat-post-aluminum-alloy-extra-long-17-7inch-450mm
store_origin: PT
region: Portugal
---

# 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

**Brand:** upanbike
**Price:** € 39.90
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** 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 by upanbike
- **How much does it cost?** € 39.90 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/85828697-bike-seat-post-aluminum-alloy-extra-long-17-7inch-450mm)

## Best For

- upanbike enthusiasts

## Why This Product

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

## Description

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

## Features

- About this item
- To fit frame seatpost hole:30.9mm     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

## Images

![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 - Image 1](https://m.media-amazon.com/images/I/51ImJ4lnkbL.jpg)

## Available Options

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

## Customer Reviews

### ⭐ 







  
  
    Terrible, weak post
  

*by S***. on Reviewed in the United States on May 20, 2018*

I went riding for 20 mins on my MTB and I started to feel something weird on this new seat post. I checked it out and it started to bend. I decided to turn back and the bend only got worst.I had the post on position 8, far from the minimum insertion point. I'm 225 lbs but I was only doing fire roads, no single trails. Terrible product, returning

### ⭐⭐⭐⭐⭐ 







  
  
    Excellent company to deal with !!
  

*by M***N on Reviewed in the United States on June 27, 2020*

I'm giving a positive review of this company and this product.  Even though there was an issue with my seat post, it was because I'm 6'4" and fully dressed, I'm pushing 300 lbs.  But I can't knock this product.  It's well made and even little things like the insert markings are quality.  The adjustment range is great, and there is some meat to the teeth where the seat level adjusts.  Not just slight bumps like others I have seen that can jump under pressure.  Once you cinch this one down, your seat stays put.  Also, even though it was outside the 30 warranty before I had issues, they responded immediately and issued a refund so I could order a more robust model.  So if you're looking for a great pillar for a good price, and you're not over 290 lbs, I say this is a great choice !!!

### ⭐⭐⭐⭐⭐ 







  
  
    It was the perfect solution for me.
  

*by A***R on Reviewed in the United States on April 22, 2019*

My existing Specialized seatpost had a two screw system.  The screws were too thin and eventually would break.  So even though the two screw system is better for adjustments, I can’t trust them anymore.  This seat post is longer, lighter, and looks better than the more expensive one it replaces.  I like the single chunky strong looking screw that holds the seat on.  It’s not as adjustable, but it does the job better than I expected.

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**Shop now:** [https://www.desertcart.pt/products/85828697-bike-seat-post-aluminum-alloy-extra-long-17-7inch-450mm](https://www.desertcart.pt/products/85828697-bike-seat-post-aluminum-alloy-extra-long-17-7inch-450mm)

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-02-09*