---
product_id: 468759490
title: "EXA Form Upgraded Speed Up 27.2mm/30.9mm/31.6mm Cable-Less Hydraulic Dropper Seatpost, 100mm/120mm/125mm/150mm Travel Dropper Post for MTB/E-Bike/Road Bike"
brand: "coomeng"
price: "฿10161"
currency: THB
in_stock: true
reviews_count: 13
category: "Coo Meng"
url: https://www.desertcart.co.th/products/468759490-exa-form-upgraded-speed-up-27-2mm-30-9mm-31
store_origin: TH
region: Thailand
---

# 3 diameter options for perfect fit Lightweight 7075 aluminum alloy build Cable-less hydraulic system for sleek install EXA Form Upgraded Speed Up 27.2mm/30.9mm/31.6mm Cable-Less Hydraulic Dropper Seatpost, 100mm/120mm/125mm/150mm Travel Dropper Post for MTB/E-Bike/Road Bike

**Brand:** coomeng
**Price:** ฿10161
**Availability:** ✅ In Stock

## Summary

> 🚵‍♂️ Elevate your ride, ditch the cables, own the trail!

## Quick Answers

- **What is this?** EXA Form Upgraded Speed Up 27.2mm/30.9mm/31.6mm Cable-Less Hydraulic Dropper Seatpost, 100mm/120mm/125mm/150mm Travel Dropper Post for MTB/E-Bike/Road Bike by coomeng
- **How much does it cost?** ฿10161 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/468759490-exa-form-upgraded-speed-up-27-2mm-30-9mm-31)

## Best For

- coomeng enthusiasts

## Why This Product

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

## Key Features

- • **Effortless Installation:** No cables or housing needed—just insert, lock, and ride. Minimal setup, maximum performance.
- • **Tailored Fit, Every Ride:** Choose from 27.2mm, 30.9mm, or 31.6mm diameters to match your frame perfectly—no compromises.
- • **Durability Meets Lightness:** Crafted from premium 7075 aluminum alloy, combining rugged strength with featherlight weight for all-day rides.
- • **Seamless Height Adjustment:** Hydraulic dropper with simple lever pull lets you fine-tune seat height on the fly for ultimate trail control.
- • **Infinite Travel, Infinite Possibilities:** Available in 100mm to 150mm travel options, giving you the freedom to conquer any terrain with confidence.

## Overview

The EXA Form Upgraded Speed Up Dropper Seatpost offers a cable-less hydraulic system in three diameter sizes (27.2mm, 30.9mm, 31.6mm) and multiple travel lengths (100mm to 150mm). Made from durable yet lightweight 7075 aluminum alloy, it installs easily without cables or housing and provides smooth, infinitely adjustable seat height control—perfect for MTB, E-Bike, and road bike enthusiasts seeking streamlined performance and versatility.

## Description

desertcart.com : EXA Form Upgraded Speed Up 31.6mm Cable-Less Hydraulic Dropper Seatpost, 100mm Travel Dropper Post for MTB/E-Bike/Road Bike-31.6mm*383mm : Sports & Outdoors

Review: Great simple office chair dropper, I own two and love them - Love this post so far. It is simple to install and works as expected. I am heavy enough that I have no trouble putting it down. I can even put it down while standing next to the bike and pushing it down with my hand. I don't need to apply too much pressure to push it down even when just pushing on the seat. I own the 100mm version for my 2008 Kona Jake 58 cm and a 120mm for my 2010 Kona Jake 56cm. This allows me to go from max height for my chimp-like short legs and still be able to go all the way down to the collar which puts the seat about 1.5" from the top tube for max flexibility on descents. You can really have the best of both worlds with this. The only downside to this is that you must take a hand off the bars to raise/lower it so it is best on trails that I have memorized as I can lower where it isn't too rough ahead of the section I want it down for. As a rider who is new to droppers, I have no issue most of the time if I can't drop it as I am used to getting up over the seat if need be but it sure is nice to get it down about halfway for most things. This keeps the nose of the seat where I have pretty good control with my legs on the sides of the seat. For small jumps all of the way down is best. This is simple and effective and requires no extra cables which I appreciate. I try hard to keep it clean and hope that they last a long time.
Review: Great Manual Dropper Post - I am using the dropper post on my 2010 Specialized Stumpjumper. The frame configuration doesn’t permit any internal routing, and since I have a front derailleur (3x) set up, I didn’t want to add another lever. Anyway, once I got use to the manual post seat control everything clicked. I mostly do trails, cross country, etc., not much downhill, so I can often “set and forget:” the seat height. This was an inexpensive upgrade which works great for my use.

## Features

- 3 Diameters Are Available: 27.2mm, 30.9mm, 31.6mm are all available for sale, it is very important to choose the correct diameter of seatpost according to the inner diameter of your bike frame. If you are not sure how to choose, please feel free to contact us for help.
- Easy Installation: no cables or housing, just gently insert the purchased seat tube into the frame, and then lock it. IMPORTANT: Insertion is required to the minimum insertion depth scale.
- Simple Operation: Just pull the lever and sit to adjust seat height.
- Infinitely Adjustable: Seat height can be set anywhere in travel range.
- Durable and Lightweight: Hydraulic dropper integrated inside 7075 alloy tube.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B9KBTCB1 |
| Best Sellers Rank | #60,486 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #34 in Bike Seat Posts |
| Bike Type | Road Bike |
| Brand Name | CooMeng |
| Color | Diameter: 31.6mm |
| Customer Reviews | 4.2 4.2 out of 5 stars (239) |
| Item Dimensions W x H | 1.24"W x 15.08"H |
| Item Type Name | Dropper Post |
| Item Weight | 0.75 Kilograms |
| Manufacturer | CooMeng |
| Manufacturer Part Number | Speed Up 31.6mm*383mm*100mm |
| Material Type | Aluminum |
| Model Number | Diameter: 31.6mm |
| UPC | 602581929857 |
| Warranty Description | Non-artificial damage, one year warranty. |

## Product Details

- **Brand:** CooMeng
- **Color:** Diameter: 31.6mm
- **Item Weight:** 0.75 Kilograms
- **Material:** Aluminum
- **Product Dimensions:** 1.24"W x 15.08"H

## Images

![EXA Form Upgraded Speed Up 27.2mm/30.9mm/31.6mm Cable-Less Hydraulic Dropper Seatpost, 100mm/120mm/125mm/150mm Travel Dropper Post for MTB/E-Bike/Road Bike - Image 1](https://m.media-amazon.com/images/I/51tdztlWYmL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great simple office chair dropper, I own two and love them
*by A***R on October 28, 2025*

Love this post so far. It is simple to install and works as expected. I am heavy enough that I have no trouble putting it down. I can even put it down while standing next to the bike and pushing it down with my hand. I don't need to apply too much pressure to push it down even when just pushing on the seat. I own the 100mm version for my 2008 Kona Jake 58 cm and a 120mm for my 2010 Kona Jake 56cm. This allows me to go from max height for my chimp-like short legs and still be able to go all the way down to the collar which puts the seat about 1.5" from the top tube for max flexibility on descents. You can really have the best of both worlds with this. The only downside to this is that you must take a hand off the bars to raise/lower it so it is best on trails that I have memorized as I can lower where it isn't too rough ahead of the section I want it down for. As a rider who is new to droppers, I have no issue most of the time if I can't drop it as I am used to getting up over the seat if need be but it sure is nice to get it down about halfway for most things. This keeps the nose of the seat where I have pretty good control with my legs on the sides of the seat. For small jumps all of the way down is best. This is simple and effective and requires no extra cables which I appreciate. I try hard to keep it clean and hope that they last a long time.

### ⭐⭐⭐⭐⭐ Great Manual Dropper Post
*by M***. on February 12, 2026*

I am using the dropper post on my 2010 Specialized Stumpjumper. The frame configuration doesn’t permit any internal routing, and since I have a front derailleur (3x) set up, I didn’t want to add another lever. Anyway, once I got use to the manual post seat control everything clicked. I mostly do trails, cross country, etc., not much downhill, so I can often “set and forget:” the seat height. This was an inexpensive upgrade which works great for my use.

### ⭐⭐⭐⭐ Works.
*by R***S on March 3, 2025*

After doing a lot of research, this is the cheapest decent office chair style dropper post I could find. The first one was pretty difficult to get it to drop, even with all my weight on it (180lbs.), so I sent it back and got another one, which was definitely easier, but sometimes I still have to pogo stick up and down a little bit to get it to drop, even after putting some stanchion lube on it. I read a lot of reports of the cheaper dropper post failing/breaking, but after some pretty extensive testing, this one's been pretty solid. For the price point, I definitely recommend it. It gets the job done. Did you find this review helpful?

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**Shop now:** [https://www.desertcart.co.th/products/468759490-exa-form-upgraded-speed-up-27-2mm-30-9mm-31](https://www.desertcart.co.th/products/468759490-exa-form-upgraded-speed-up-27-2mm-30-9mm-31)

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-04-28*