---
product_id: 474150521
title: "EXA Form 900i 30.9mm/31.6mm Internal Routing Dropper Post with Lever and Cable Kit MTB/Ebike Internal Bike Seatpost 100/120/150mm Travel -345/395/445mm Length"
brand: "jfoyh"
price: "€ 261.91"
currency: EUR
in_stock: true
reviews_count: 8
category: "Jfoyh"
url: https://www.desertcart.es/products/474150521-exa-form-900i-30-9mm-31-6mm-internal-routing-dropper
store_origin: ES
region: Spain
---

# 30.9mm & 31.6mm diameters 7075 aluminum alloy build Smooth remote lever control EXA Form 900i 30.9mm/31.6mm Internal Routing Dropper Post with Lever and Cable Kit MTB/Ebike Internal Bike Seatpost 100/120/150mm Travel -345/395/445mm Length

**Brand:** jfoyh
**Price:** € 261.91
**Availability:** ✅ In Stock

## Summary

> 🚵‍♂️ Elevate your ride, drop the limits.

## Quick Answers

- **What is this?** EXA Form 900i 30.9mm/31.6mm Internal Routing Dropper Post with Lever and Cable Kit MTB/Ebike Internal Bike Seatpost 100/120/150mm Travel -345/395/445mm Length by jfoyh
- **How much does it cost?** € 261.91 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/474150521-exa-form-900i-30-9mm-31-6mm-internal-routing-dropper)

## Best For

- jfoyh enthusiasts

## Why This Product

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

## Key Features

- • **Lightweight Yet Rock-Solid Durability:** Crafted from premium 7075 aluminum alloy, balancing featherlight weight with rugged reliability for every trail.
- • **Customizable Diameter & Length Options:** Choose between 30.9mm or 31.6mm diameters and lengths from 345mm to 445mm to perfectly match your ride.
- • **Effortless On-the-Fly Height Adjustment:** Remote lever lets you instantly adapt seat height mid-ride—stay agile and in control without missing a beat.
- • **Versatile Travel Range for Every Terrain:** Select 100mm, 120mm, or 150mm travel to dial in your dropper post for smooth descents or technical climbs.
- • **Precision Fit for Internal Routing Frames:** Designed exclusively for sleek, cable-hidden setups—upgrade your bike’s aesthetics and performance.

## Overview

The EXA Form 900i dropper post is a high-performance, internally routed bike seatpost available in 30.9mm and 31.6mm diameters. Made from durable 7075 aluminum alloy, it offers multiple length (345mm, 395mm, 445mm) and travel (100mm, 120mm, 150mm) options. Featuring a smooth remote lever for quick seat height adjustments, it’s engineered for riders seeking seamless control and a clean, integrated look on MTB and e-bikes.

## Description

desertcart.com : EXA Form 900i 30.9mm/31.6mm Internal Routing Dropper Post with Lever and Cable Kit MTB/Ebike Internal Bike Seatpost 100/120/150mm Travel -345/395/445mm Length : Sports & Outdoors

Review: Works for 26" bike for pre-teen, first use of day a bit tight - I have a kid that's getting into Mountain Biking, and put it on a 26" XXS Specialized RockHopper. Installation went as well as could be expected. Two main issues: - On the XXS RockHopper, it has a front derailleur, so finding a good spot for the lever took a bit of trial - The seat hydraulics get stuck the first time of the day, so getting it to extend the first time took some trial. Basically, I put a skinny screwdriver through the lever so I could pull it with my right hand, held the shaft with left hand, and held the other end between my feet and tried pushing/pulling until it unlocked. The provided cable was plenty big enough (I cut off over a foot). The lever hardware seems pretty great, and I didn't feel like I was going to strip any screws or break anything. Adjusting the tightness of the cable went really well due to the two adjustment screws (plenty of tightening room). The kid isn't very strong in the thumbs yet, so the first ride of the day he has to use two hands to "unlock" the stuck piston. After that it is incredibly smooth going up and down, and his left thumb is able to push it in okay enough (it's still tough, but it'll get easier as muscles grow). Again, the seat post does seem to get 'stuck' after sitting there for a day, but then goes super smooth the rest of the day. I'm happy with the post and the installation. It seems like good quality for the price I paid. It definitely isn't as good as the one on my own bike (mine has no 'stuck' issue after prolonged periods of inactivity), but good enough for this starter bike or anyone on a budget that wants a post that will last. I'll update this if I ever hit issues.
Review: 👍🏽works great so far. - I just finished installation and test ride and am very pleased with this dropper post. It came with all the bits needed to suit my bike. It releases easily, pops up strong and slides down smoothly. Much better than the Fezzari OEM one. No instructions were included but installation was easy after working through removal of the old post, cable and lever.

## Features

- For Internal Routing Frames Only – This dropper post is specifically designed for bikes with internal cable routing. Please confirm your frame supports internal routing before purchasing.
- Select the Correct Diameter – Available in 30.9mm and 31.6mm. It’s crucial to measure your bike’s seat tube inner diameter and choose the matching size. An incorrect size will not fit.
- Smooth Remote-Control Height Adjustment – Includes a remote lever for quick and precise seat height changes while riding, so you can adapt instantly without stopping.
- Lightweight & Durable Alloy Construction – Crafted from 7075 aluminum alloy for strength and reliability. Weight ranges from approx. 480g (shortest) to 670g (longest) depending on the length.
- Multiple Length & Travel Options – Choose from 345mm/395mm/445mm lengths with 100mm/120mm/150mm travel options to match your bike and riding style.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09YH2PD3K |
| Best Sellers Rank | #57,787 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #16 in Bike Seat Posts |
| Brand | JFOYH |
| Brand Name | JFOYH |
| Color | Black |
| Customer Reviews | 4.2 out of 5 stars 221 Reviews |
| Included Components | Dropper Post Body, Lever Kit |
| Item Dimensions W x H | 1.2"W x 17.5"H |
| Item Weight | 0.73 Kilograms |
| Manufacturer | JFOYH BIKE |
| Material | Aluminum |
| Material Type | Aluminum |
| Product Dimensions | 1.2"W x 17.5"H |
| UPC | 774144172076 |
| Warranty Description | 12-month Limited Wrranty |

## Product Details

- **Color:** Black
- **Item Weight:** 0.73 Kilograms
- **Material:** Aluminum
- **Brand:** JFOYH
- **Product Dimensions:** 1.2"W x 17.5"H

## Images

![EXA Form 900i 30.9mm/31.6mm Internal Routing Dropper Post with Lever and Cable Kit MTB/Ebike Internal Bike Seatpost 100/120/150mm Travel -345/395/445mm Length - Image 1](https://m.media-amazon.com/images/I/61D4iUwD08L.jpg)

## Available Options

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

## Questions & Answers

**Q: What type of lever is included in the package? 1X lever? 2X lever?**
A: It's coming with standard 1x lever.

**Q: Is it coming with cable in housing?**
A: Yes, it's coming with cable in housing, ahout 1500mm.

**Q: How to install this dropper post?**
A: The installation process is simple, we have also shot an installation tutorial for you, please watch our product related videos.

**Q: Is 900i dropper post only for internal routing frame?**
A: Yes, 900i only for internal routinbg frame.

**Q: How Much Rotational Play Is Normal?**
A: 1-3mm of rotation is normal. Without a bit of wiggle room between the stanchion and the mid cap bushing, the dirt and grime that makes its way into your dropper could do some serious damage.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works for 26" bike for pre-teen, first use of day a bit tight
*by M***T on May 15, 2023*

I have a kid that's getting into Mountain Biking, and put it on a 26" XXS Specialized RockHopper. Installation went as well as could be expected. Two main issues: - On the XXS RockHopper, it has a front derailleur, so finding a good spot for the lever took a bit of trial - The seat hydraulics get stuck the first time of the day, so getting it to extend the first time took some trial. Basically, I put a skinny screwdriver through the lever so I could pull it with my right hand, held the shaft with left hand, and held the other end between my feet and tried pushing/pulling until it unlocked. The provided cable was plenty big enough (I cut off over a foot). The lever hardware seems pretty great, and I didn't feel like I was going to strip any screws or break anything. Adjusting the tightness of the cable went really well due to the two adjustment screws (plenty of tightening room). The kid isn't very strong in the thumbs yet, so the first ride of the day he has to use two hands to "unlock" the stuck piston. After that it is incredibly smooth going up and down, and his left thumb is able to push it in okay enough (it's still tough, but it'll get easier as muscles grow). Again, the seat post does seem to get 'stuck' after sitting there for a day, but then goes super smooth the rest of the day. I'm happy with the post and the installation. It seems like good quality for the price I paid. It definitely isn't as good as the one on my own bike (mine has no 'stuck' issue after prolonged periods of inactivity), but good enough for this starter bike or anyone on a budget that wants a post that will last. I'll update this if I ever hit issues.

### ⭐⭐⭐⭐⭐ 👍🏽works great so far.
*by L***. on January 15, 2024*

I just finished installation and test ride and am very pleased with this dropper post. It came with all the bits needed to suit my bike. It releases easily, pops up strong and slides down smoothly. Much better than the Fezzari OEM one. No instructions were included but installation was easy after working through removal of the old post, cable and lever.

### ⭐⭐⭐⭐ Good product
*by T***M on June 17, 2025*

Works great but a lot of trouble instaling

## Frequently Bought Together

- EXA Form 900i 30.9mm/31.6mm Dropper Post with Remote Lever and Cable Kit MTB/Ebike Internal Routing Dropper Seatpost for Mountain Bike(100mm/125mm/150mm Travel)
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*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-03-15*