---
product_id: 437207524
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: "1148 Lei"
currency: RON
in_stock: true
reviews_count: 8
url: https://www.desertcart.ro/products/437207524-exa-form-900i-30-9mm-31-6mm-internal-routing-dropper
store_origin: RO
region: Romania
---

# Multiple length & travel options for perfect fit 7075 aluminum alloy for lightweight durability Smooth remote lever for instant height adjustment 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:** 1148 Lei
**Availability:** ✅ In Stock

## Summary

> 🚵‍♂️ Elevate your ride with precision and style—drop in, stand out!

## 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?** 1148 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/437207524-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

- • **Customizable Travel & Length:** Select from 100/120/150mm travel and 345/395/445mm lengths to match your unique ride style.
- • **Precision Fit in Two Diameters:** Choose between 30.9mm or 31.6mm to guarantee a perfect, rattle-free installation.
- • **Effortless On-the-Fly Adjustments:** Remote lever lets you instantly adapt seat height without missing a beat on the trail.
- • **Premium 7075 Aluminum Alloy Build:** Ultra-strong yet lightweight construction ensures durability without weighing you down.
- • **Seamless Internal Routing Compatibility:** Designed exclusively for internal cable routing frames—clean, sleek, and future-ready.

## Overview

The EXA Form 900i dropper post is engineered for internal routing MTB and e-bike frames, offering two diameter options (30.9mm and 31.6mm) and customizable travel lengths (100-150mm) with three post lengths (345-445mm). Crafted from robust 7075 aluminum alloy, it features a smooth remote lever for quick seat height adjustments on the fly, combining durability, lightweight design, and seamless integration for the modern rider.

## Description

The 900-i boasts features typically only found on higher end droppers such as aluminum alloy construction, sealed cartridge, forged head parts, 1-piece mast and of course, It functions as a smooth, reliable dropper post.

## 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 |
|---------------|-------|
| Manufacturer | JFOYH BIKE |
| UPC | 774144171987 |
| Item Package Dimensions L x W x H | 16.89 x 2.87 x 2.83 inches |
| Package Weight | 0.74 Kilograms |
| Item Dimensions  LxWxH | 3.94 x 3.94 x 13.58 inches |
| Brand Name | JFOYH |
| Warranty Description | 12-month Limited Wrranty |
| Model Name | 900i |
| Part Number | BIKE DROPPER SEATPOST |
| Included Components | Dropper Post Body, Lever Kit |
| Size | Φ30.9mm Dia x 100mm Tra x 345mm Len |

## Product Details

- **Color:** Black
- **Item Weight:** 0.69 Kilograms
- **Material:** Aluminum
- **Brand:** JFOYH
- **Product Dimensions:** 3.94"W x 13.58"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.

### ⭐⭐⭐⭐⭐ Great post for the budget minded. Highly recommend.
*by B***3 on March 29, 2025*

This dropper functions as described. Six month test has gone well as I ride mainly blue trails with the occasional black 2-3 times a week. Only thing to note is I have to slightly stand and relieve tension from post in order for it to drop easier, ie: slightly stand, engage thumb trigger, sit on post to drop. Great post for the budget minded. Highly recommend. Hope this helps. Happy shopping.

### ⭐⭐⭐⭐ Decent budget dropper
*by A***R on July 1, 2025*

I ordered the 36.1/125mm dropper. It's a direct fitment on my bike. However the installation instructions are difficult to follow. You are much better off finding a video on YouTube - specifically when it comes to getting the right guide cable length. If I followed the recommended instruction for measuring cable length I would have had too much slack inside my frame. The grip mounted control lever seems to be cheaply cast, there are better ones out there. Out of the box, the post is a bit sticky.. you have to cycle it up and down a few times before the seal works free. I also noticed a little bit of slop in the tube, even after everything is clamped down; the riser tube has a bit of play.

## 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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**Shop now:** [https://www.desertcart.ro/products/437207524-exa-form-900i-30-9mm-31-6mm-internal-routing-dropper](https://www.desertcart.ro/products/437207524-exa-form-900i-30-9mm-31-6mm-internal-routing-dropper)

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-24*