---
product_id: 517900809
title: "EXA Form Hydraulic Dropper Seat Post 27.2mm/30.9mm/31.6mm Cordless 100mm/120mm/125mm/150mm, Travel Drip Bar for MTB/E-Bike/Road Bike"
brand: "coomeng"
price: "C$16212"
currency: NIO
in_stock: true
reviews_count: 9
category: "Coo Meng"
url: https://www.desertcart.ni/products/517900809-exa-form-hydraulic-dropper-seat-post-27-2mm-30-9mm
store_origin: NI
region: Nicaragua
---

# 3 diameter options for perfect fit Lightweight 7075 aluminum build Hydraulic cartridge with self-rebound EXA Form Hydraulic Dropper Seat Post 27.2mm/30.9mm/31.6mm Cordless 100mm/120mm/125mm/150mm, Travel Drip Bar for MTB/E-Bike/Road Bike

**Brand:** coomeng
**Price:** C$16212
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate your ride with cordless hydraulic finesse!

## Quick Answers

- **What is this?** EXA Form Hydraulic Dropper Seat Post 27.2mm/30.9mm/31.6mm Cordless 100mm/120mm/125mm/150mm, Travel Drip Bar for MTB/E-Bike/Road Bike by coomeng
- **How much does it cost?** C$16212 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/products/517900809-exa-form-hydraulic-dropper-seat-post-27-2mm-30-9mm)

## 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

- • **Adjust On-The-Fly:** Easily tweak your seat height mid-ride with a simple lever pull—maximize comfort and control instantly.
- • **Featherlight Strength:** Crafted from aerospace-grade 7075 aluminum, this dropper post balances durability with ultra-lightweight performance.
- • **Seamless Fit, Zero Hassle:** Choose from 27.2mm, 30.9mm, or 31.6mm diameters for a flawless frame match—no adapters needed.
- • **Cordless Hydraulic Precision:** Enjoy smooth, cable-free height adjustments with a self-rebounding hydraulic cartridge—ride-ready anytime.
- • **Upgrade Your Ride Experience:** No cables, no fuss—just pure, responsive dropper action that transforms your MTB, E-bike, or road bike.

## Overview

The EXA Form Hydraulic Dropper Seat Post offers a cable-free, hydraulic cartridge system with self-rebound for smooth, on-demand seat height adjustments. Available in three diameters (27.2mm, 30.9mm, 31.6mm) and multiple travel lengths (100mm to 150mm), it fits a wide range of bikes. Made from lightweight yet strong 7075 aluminum, it ensures durability without added weight, making it an ideal upgrade for mountain, e-bikes, and road bikes seeking hassle-free, precise seat positioning.

## Description

Speed Up upgraded to hydraulic cartridge and can rebound by itself when press the lever in 2022. It can stop any height within the travel. FeaturesModel: Manual Lever ControlAdvantage: No side-play, ultra-lightweightType: Hydraulic cartridge, rebound up automaticly when press the lever.Travel: 100mm/120mm/125 mm/150 mmDiameter: 27.2mm, 30.9mm, 31.6mm.Seatpost with other diameters (eg: 28.6mm, 30.0mm, 30.4mm, 33.9mm) can be used as needed, and the corresponding adapter can be purchased separately.

Review: Dropper post. 30.9x100mm - I am very pleased that I bought this item. It works very well and adjusts to allow mounting and dismounting of my mountain bike easier. The build quality is excellent. Fitting the item is basically a no brained as if you order the correct size just slides into the frame easily and you obviously have no cable to install and attach. I ordered the 30.9mm with a drop of 100mm and it fits and works brilliantly.
Review: Fuss free dropper post - Having purchased my first cable system dropper (used item), I just couldn't being myself to fit a scratched up Roxshox to a new bike, and also wasn't sure about the routing through the frame... after a week or so investigating, I liked the look of one of these "office chair" type posts, and so glad I bought this dropper! Works perfectly, no routing, no remote, just reach easily for the release with weight on it and down it goes. Couldn't be happier. Review for the 125mm version. *edit.. It died after around ten months, but my bike wasn't being used for a fairly big chunk of that, so not the most durable product. In fairness, given the ridiculous prices of similar products it's something to weigh up. I may purchase another one, because when it was working, it was great

## Features

- 3 diameters are available: 27.2mm, 30.9mm and 31.6mm. are all available for sale. It is very important to choose the correct diameter of the seat post according to the inner diameter of your bicycle frame. -
- Easy installation: no cables or housings, just carefully insert the purchased seat tube into the frame and then fix it. Important: The slot must be made up to the minimum insertion depth.
- Easy to use: simply pull the lever and sit down to adjust the seat height.
- Fully adjustable: the seat height can be adjusted throughout the ride.
- STRONG AND LIGHTWEIGHT: Hydraulic dropper seat post integrated into a 7075 aluminum tube.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B9KCY1RV |
| Batteries included? | No |
| Best Sellers Rank | 80,479 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 93 in Cycling Seat Posts |
| Bike type | Mountain Bike |
| Color | Diameter: 30.9 mm |
| Customer Reviews | 4.2 4.2 out of 5 stars (220) |
| Date First Available | 1 Sept. 2022 |
| Department | Unisex |
| Item model number | Diameter: 30.9mm |
| Manufacturer | CooMeng |
| Material type | Aluminium |
| Product Dimensions | 10.01 x 10.01 x 38.3 cm; 730 g |
| Size | Length 383mm X Travel 100mm |
| UPC | 602581929826 |

## Product Details

- **Brand:** CooMeng
- **Colour:** Diameter: 30.9 mm
- **Item weight:** 0.73 Kilograms
- **Material:** Aluminium
- **Product dimensions:** 10W x 38.3H centimetres

## Images

![EXA Form Hydraulic Dropper Seat Post 27.2mm/30.9mm/31.6mm Cordless 100mm/120mm/125mm/150mm, Travel Drip Bar for MTB/E-Bike/Road Bike - Image 1](https://m.media-amazon.com/images/I/518i9rTBy1L.jpg)
![EXA Form Hydraulic Dropper Seat Post 27.2mm/30.9mm/31.6mm Cordless 100mm/120mm/125mm/150mm, Travel Drip Bar for MTB/E-Bike/Road Bike - Image 2](https://m.media-amazon.com/images/I/51tdztlWYmL.jpg)
![EXA Form Hydraulic Dropper Seat Post 27.2mm/30.9mm/31.6mm Cordless 100mm/120mm/125mm/150mm, Travel Drip Bar for MTB/E-Bike/Road Bike - Image 3](https://m.media-amazon.com/images/I/61NYGGebcsL.jpg)
![EXA Form Hydraulic Dropper Seat Post 27.2mm/30.9mm/31.6mm Cordless 100mm/120mm/125mm/150mm, Travel Drip Bar for MTB/E-Bike/Road Bike - Image 4](https://m.media-amazon.com/images/I/61OR9JkAAAL.jpg)
![EXA Form Hydraulic Dropper Seat Post 27.2mm/30.9mm/31.6mm Cordless 100mm/120mm/125mm/150mm, Travel Drip Bar for MTB/E-Bike/Road Bike - Image 5](https://m.media-amazon.com/images/I/61SoaoLUmyL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Dropper post. 30.9x100mm
*by M***. on 3 August 2025*

I am very pleased that I bought this item. It works very well and adjusts to allow mounting and dismounting of my mountain bike easier. The build quality is excellent. Fitting the item is basically a no brained as if you order the correct size just slides into the frame easily and you obviously have no cable to install and attach. I ordered the 30.9mm with a drop of 100mm and it fits and works brilliantly.

### ⭐⭐⭐⭐⭐ Fuss free dropper post
*by R***D on 3 December 2024*

Having purchased my first cable system dropper (used item), I just couldn't being myself to fit a scratched up Roxshox to a new bike, and also wasn't sure about the routing through the frame... after a week or so investigating, I liked the look of one of these "office chair" type posts, and so glad I bought this dropper! Works perfectly, no routing, no remote, just reach easily for the release with weight on it and down it goes. Couldn't be happier. Review for the 125mm version. *edit.. It died after around ten months, but my bike wasn't being used for a fairly big chunk of that, so not the most durable product. In fairness, given the ridiculous prices of similar products it's something to weigh up. I may purchase another one, because when it was working, it was great

### ⭐⭐⭐⭐⭐ Well worth it
*by A***W on 3 May 2025*

Here's a potential review for a dropper post: *Dropper Post Review* I'm really impressed with this dropper post! The installation was straightforward, and the adjustment mechanism is smooth and reliable. I love how easily I can change the saddle height on the fly, which has been a game-changer for my rides. The build quality feels solid, and the design is sleek. It's been a great addition to my bike, giving me more flexibility and control on different terrain. - Easy to install and adjust - Reliable and smooth operation - Great build quality Overall, I'd definitely recommend this dropper post to anyone looking to upgrade their bike's functionality. It's been a worthwhile investment for me, and I think it will be for others too.

## Frequently Bought Together

- 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
- WTB Volt Bike Saddle - Comfortable Medium Thickness Padding, Contoured Shape with a Flex-Tuned Shell - Lightweight MTB Saddle for Optimal Support & Performance
- ROCKBROS MTB Pedals Mountain Bike Pedals Lightweight Nylon Fiber Bicycle Platform Pedals for BMX MTB 9/16"

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*Product available on Desertcart Nicaragua*
*Store origin: NI*
*Last updated: 2026-01-27*