---
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: "₨34600"
currency: LKR
in_stock: true
reviews_count: 6
category: "Upanbike"
url: https://www.desertcart.lk/products/261005990-upanbike-bike-bicycle-mtb-replacement-extra-long-seatpost-seat-post
store_origin: LK
region: Sri Lanka
---

# 450mm extra long length adjustable saddle tilt clamp 6061 T6 aluminum alloy 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:** ₨34600
**Availability:** ✅ In Stock

## Summary

> 🚴‍♂️ Ride taller, ride smarter — the UPANBIKE seatpost that fits your ambition!

## 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?** ₨34600 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/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

- • **Universal Compatibility:** Designed to replace seatposts on mountain, road, and universal bikes—upgrade your bike effortlessly.
- • **Customizable Saddle Angle:** Adjustable clamp lets you fine-tune your saddle tilt for optimal riding performance and comfort.
- • **Durable Lightweight Build:** Crafted from premium 6061 T6 aluminum alloy combining strength with minimal weight (449g).
- • **Elevate Your Ride Comfort:** Extra long 17.7" (450mm) seatpost perfectly suited for taller riders who demand ergonomic posture.
- • **Precision Fit for Every Frame:** Available in multiple diameters (25.4mm to 31.6mm) with slightly undersized measurements for a snug, slip-free fit.

## Overview

The UPANBIKE MTB replacement seatpost offers an extra-long 450mm length made from durable 6061 T6 aluminum alloy. It fits a wide range of bike frames with diameters from 25.4mm to 31.6mm, featuring a slightly undersized design for secure installation. Its adjustable saddle clamp allows precise tilt customization, making it ideal for taller riders seeking enhanced comfort and performance across mountain, road, and universal bikes.

## 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 (795) |
| 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/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 2](https://m.media-amazon.com/images/I/71vWPCQyH9L.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/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 4](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 5](https://m.media-amazon.com/images/I/61fffLiQceS.jpg)

## Available Options

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

## 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
- Wittkop Bike Seat I Bicycle Seat for Men and Women, Waterproof Bike Saddle with Innovative 5-Zone-Concept I Exercise Bike Seat for BMX, MTB & Road
- Velmia Bicycle Saddle - Comfortable Saddle for Men and Women - 3 Zone Concept - Waterproof Bicycle Seat with Ergonomic Design

---

## 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.lk/products/261005990-upanbike-bike-bicycle-mtb-replacement-extra-long-seatpost-seat-post](https://www.desertcart.lk/products/261005990-upanbike-bike-bicycle-mtb-replacement-extra-long-seatpost-seat-post)

---

*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-03-13*