---
product_id: 451257580
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: "34511 kr"
currency: ISK
in_stock: true
reviews_count: 13
category: "Jfoyh"
url: https://www.desertcart.is/products/451257580-exa-form-900i-30-9mm-31-6mm-internal-routing-dropper
store_origin: IS
region: Iceland
---

# Multiple length & travel options 7075 aluminum alloy build Smooth remote lever 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:** 34511 kr
**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?** 34511 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/451257580-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:** Crafted from aerospace-grade 7075 aluminum alloy for durability that won’t weigh you down.
- • **Effortless On-the-Fly Adjustments:** Remote lever lets you instantly adapt seat height mid-ride—stay in control without missing a beat.
- • **Versatile Lengths for Every Frame:** Available in 345mm, 395mm, and 445mm lengths to fit everything from nimble trail bikes to aggressive eMTBs.
- • **Tailored Diameter & Travel Options:** Choose between 30.9mm or 31.6mm diameters and 100/120/150mm travel to perfectly match your ride style.
- • **Precision Fit for Internal Routing Frames:** Designed exclusively for sleek, internal cable routing—no messy cables, just clean performance.

## Overview

The EXA Form 900i dropper post is a premium internal routing seatpost engineered for mountain and e-bikes. Featuring aerospace-grade 7075 aluminum alloy construction, it offers multiple diameter, length, and travel options to ensure a perfect fit. Its smooth remote lever enables quick seat height adjustments on the fly, enhancing ride adaptability and control. Designed for riders who demand durability, precision, and a clean, cable-free aesthetic.

## 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.

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 | B09YH2J2T6 |
| Best Sellers Rank | #57,787 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #16 in Bike Seat Posts |
| Brand Name | JFOYH |
| Customer Reviews | 4.2 4.2 out of 5 stars (221) |
| Date First Available | April 21, 2022 |
| Included Components | Dropper Post Body, Lever Kit |
| Item Dimensions LxWxH | 1.22 x 1.22 x 17.52 inches |
| Item Package Dimensions L x W x H | 17.04 x 2.91 x 2.83 inches |
| Manufacturer | JFOYH BIKE |
| Model Name | 900i |
| Package Weight | 0.81 Kilograms |
| Part Number | BIKE DROPPER SEATPOST |
| Size | Φ30.9mm Dia x 150mm Tra x 445mm Len |
| UPC | 774144172045 772168460025 |
| Warranty Description | 12-month Limited Wrranty |

## Product Details

- **Brand:** JFOYH
- **Color:** Black
- **Item Weight:** 0.81 Kilograms
- **Material:** Aluminum
- **Product Dimensions:** 1.22"W x 17.52"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/519w3738ekL.jpg)
![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 2](https://m.media-amazon.com/images/I/61BDX2UGmUL.jpg)
![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 3](https://m.media-amazon.com/images/I/61D4iUwD08L.jpg)
![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 4](https://m.media-amazon.com/images/I/61aiiMqvKKL.jpg)
![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 5](https://m.media-amazon.com/images/I/71o8VNeN2PL.jpg)

## Available Options

This product comes in different **Size, Model** 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)
- Andeshunk Mountain Bike Crankset Hollow Integrated Crank axle Modified Single disc Crank 32T 34 36T

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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-03-04*