---
product_id: 207876881
title: "UPANBIKE Aluminum Alloy Bike Seat Post Length 350mm30.8mm Black for Mountain Bike Fixed Gear Bike Seatpost Four Sizes for You to Choose"
brand: "upanbike"
price: "฿2162"
currency: THB
in_stock: true
url: https://www.desertcart.co.th/products/207876881-upanbike-aluminum-alloy-bike-seat-post-length-350mm30-8mm-black
store_origin: TH
region: Thailand
---

# 4 diameter sizes - tailored precision 350mm length - perfect fit & control 6061 aluminum alloy - ultra durable UPANBIKE Aluminum Alloy Bike Seat Post Length 350mm30.8mm Black for Mountain Bike Fixed Gear Bike Seatpost Four Sizes for You to Choose

**Brand:** upanbike
**Price:** ฿2162
**Availability:** ✅ In Stock

## Summary

> 🚴‍♂️ Elevate your ride with precision and power!

## Quick Answers

- **What is this?** UPANBIKE Aluminum Alloy Bike Seat Post Length 350mm30.8mm Black for Mountain Bike Fixed Gear Bike Seatpost Four Sizes for You to Choose by upanbike
- **How much does it cost?** ฿2162 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/207876881-upanbike-aluminum-alloy-bike-seat-post-length-350mm30-8mm-black)

## 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 Fit Confidence:** Available in four precise diameters (25.4mm, 27.2mm, 28.6mm, 31.6mm) to perfectly match your bike’s needs.
- • **Effortless Installation:** Integral forging and clear safety markings make setup quick, safe, and hassle-free—ride smarter, not harder.
- • **Engineered for Endurance:** Crafted from high-strength 6061 aluminum alloy for unmatched durability and lightweight performance.
- • **Optimized Riding Posture:** 350mm length with a safety line mark ensures ideal saddle height for aerodynamic, forward-leaning rides.
- • **Seamless Saddle Compatibility:** Designed to fit most old-style bike saddles with standard clamp dimensions (saddle clamp sold separately).

## Overview

The UPANBIKE Aluminum Alloy Bike Seat Post is a robust, lightweight 6061 aluminum upgrade designed for mountain and fixed gear bikes. With four diameter options and a 350mm length featuring a safety insertion line, it ensures a perfect fit and optimal riding posture. Its durable construction and compatibility with most saddles make it a must-have for cyclists seeking performance and reliability.

## Description

specification: Material:6601 Aluminum alloy Diamter:25.4 mm 27.2 mm 28.6 mm 31.6 mm Length:350 mm Wall Thickness:3 mm Color:Black Weight:About 170 g Package Included: 1 x Bike Seatpost Characteristic 1.The material of this seatpost is a high strength aluminum alloy 6061,manufactured by integral forging. 2.Easy Installation: It is easy to install the saddle on this seat post. 3.With the general specification of the dimensions of the clamp,it fits most of the saddles (the four sizes commonly used for you). 4. There is a safety line logo, adjustment is easy. 5. By raising the saddle height, a forward leaning riding position is born, even if the air resistance (drag) is reduced.

## Features

- 【PAY ATTENTION】Please do measure the actual required diameter before purchasing. Saddle clamp is not included, please buy the saddle clamp separately if needed.
- 【MATERIAL】Seatpost made of 6061 aluminum alloy,strong and durable.
- 【SIZE】Length:350mm;Diameter:25.4mm 27.2mm 28.6mm 31.6mm;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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | UPANTECH |
| UPC | 767452332928 |
| Bike type | Mountain Bike |
| Color | Black |
| Size | 25.4mm*350mm |
| Material type | Aluminium |
| Batteries included? | No |
| Item model number | 50-188-N |
| Product Dimensions | 2.54 x 2.54 x 35.05 cm; 159 g |
| ASIN | B0789GQ412 |

## Product Details

- **Colour:** Black
- **Item weight:** 0.16 Kilograms
- **Material:** Aluminium
- **Brand:** UPANBIKE
- **Product dimensions:** 25W x 351H millimetres

## Images

![UPANBIKE Aluminum Alloy Bike Seat Post Length 350mm30.8mm Black for Mountain Bike Fixed Gear Bike Seatpost Four Sizes for You to Choose - Image 1](https://m.media-amazon.com/images/I/41cpgcgt8fL.jpg)
![UPANBIKE Aluminum Alloy Bike Seat Post Length 350mm30.8mm Black for Mountain Bike Fixed Gear Bike Seatpost Four Sizes for You to Choose - Image 2](https://m.media-amazon.com/images/I/61XgyyRhkKL.jpg)
![UPANBIKE Aluminum Alloy Bike Seat Post Length 350mm30.8mm Black for Mountain Bike Fixed Gear Bike Seatpost Four Sizes for You to Choose - Image 3](https://m.media-amazon.com/images/I/51pH2gEWuZL.jpg)
![UPANBIKE Aluminum Alloy Bike Seat Post Length 350mm30.8mm Black for Mountain Bike Fixed Gear Bike Seatpost Four Sizes for You to Choose - Image 4](https://m.media-amazon.com/images/I/21OdTCIodML.jpg)
![UPANBIKE Aluminum Alloy Bike Seat Post Length 350mm30.8mm Black for Mountain Bike Fixed Gear Bike Seatpost Four Sizes for You to Choose - Image 5](https://m.media-amazon.com/images/I/61I8Cy9+SKL.jpg)

## Available Options

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

## Questions & Answers

**Q: What is the top dimension of the 25.4mm post.**
A: The top part (the narrower part) for holding the clamp, it's diameter is about 22.15mm.

**Q: Help! 25.4mm is too thin that it falls into the frame and I can’t tighten around the seat post any tighter.  What should I do?**
A: If you're set on keeping this post, you could always purchase shims

**Q: My seat clamp says 25.4-28.6. What does that mean and will this post fit with seat clamp?**
A: The post that i ordered was 27.2 so your clamp can fit into when you tighten it

**Q: Will a 30 fit a 31.8**
A: If you are asking will a 30mm seakt post fit a 31.8 mm ophening in frame- no.

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**Shop now:** [https://www.desertcart.co.th/products/207876881-upanbike-aluminum-alloy-bike-seat-post-length-350mm30-8mm-black](https://www.desertcart.co.th/products/207876881-upanbike-aluminum-alloy-bike-seat-post-length-350mm30-8mm-black)

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-01-26*