L-TWOO

L-TWOO

L-TWOO

6 ratings
7 reviews
Free

Details

  • Released
  • Updated
  • November 14, 2021
  • June 18, 2026

Features

L-TWOO screenshot #1 for iPhone
L-TWOO screenshot #2 for iPhone
L-TWOO screenshot #3 for iPhone
L-TWOO screenshot #4 for iPhone
L-TWOO screenshot #5 for iPhone
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About

This app manages electronic bicycle shifters, allowing users to select parameters, adjust gears, and fine-tune cable distance. It also supports firmware upgrades for bicycle drive-train components.

Electronic shifter hardware management
Parameter selection for derailleurs
Gear adjustment
Fine-tune cable distance
Firmware upgrades
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What's New in L

2.8.6

June 18, 2026

1. Added automatic half-gear function for front derailleur. 2. Added support for internal gear hub devices. 3. Optimized the firmware update function.

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User reviews

중국구동계

충전기꽃고 자는데 과충전돼서 한달동안 자전거도 못타고 세관은 돈내라하고 십만원이상 지출했는데도 충전이 8프로를 넘기지 못함 중국꺼는 쓰면 안됌 시마노 105.
나 스램 라이벌로 갈아타야함

LTWOO eR9 not discoverable via Bluetooth in LTWOO App

I’m using an LTWOO eR9 electronic groupset installed on my Java Vega bike. Unfortunately, the shifter/derailleur system cannot be found in the LTWOO app via Bluetooth, even though I followed the setup instructions step by step.

What I tried (based on the manual):
• Installed the latest version of the LTWOO app
• Enabled Bluetooth on my phone and granted all required permissions (Bluetooth / Location)
• Kept the phone close to the bike (within 1 meter)
• Fully charged the eR9 battery and confirmed the system powers on
• Tried multiple times to search/add the device in the app
• Restarted the phone and switched Bluetooth off/on
• Tried again in a different area (to avoid interference)

Result:
The eR9 system never appears in the app’s Bluetooth device search list, so I cannot pair or configure it.
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An absolute catastrophe

One star is too much.

I wanted to buy the LTWOO Ae Bicycle Electronic Derailleur Wireless Shifter Lever and test the app beforehand.

The app starts in Chinese, and I couldn't find anywhere to change it to English.

Absolutely unusable and useless.

Zero! Goose 🥚 for product support!

I felt like a 12 year old responded to my emails for assistance. I only received the most basic information. Since L-Twoo is not willing to put educated people to help and answer e mails. Any product you buy you will not be able to use. It will be a waste of money for the consumers.. This is the standard practice for all of China. They can produce products but can not help or explain rendering their products useless or unusable.. Go a different route and save your time and money and aggravation.
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User friendly

It was easy to set up the groupset and to make small adjustments to it.

The only thing I can’t seem to figure out is how to check the battery level for my shifters. Hopefully this gets added in future updates.

Developer apps

FAQ

What is L-TWOO?

L-TWOO is a brand specializing in the design and production of bicycle drive-train components, particularly electronic shifters. The eStep APP is their hardware management platform for these components.

What can I do with the L-TWOO app?

With the eStep APP, you can select parameters for your electronic shifter based on your bicycle's rear and front derailleurs, adjust gears, fine-tune cable distance, and upgrade firmware.

Is the L-TWOO app free to use?

Yes, the eStep APP is available for free. It does not have any associated costs for download or use.

What devices does the L-TWOO app support?

The eStep APP is supported on iPhones and iPods. It is designed to work with these Apple mobile devices.

How often is the L-TWOO app updated?

The latest version of the eStep APP is 2.8.1, last updated on February 9, 2026. This indicates a recent update, suggesting ongoing development.

What is the age rating for the L-TWOO app?

The eStep APP has an age rating of 4+. This means it is suitable for users aged four and above.

Does L-TWOO have ads?

No, the eStep APP does not contain advertisements. Users can manage their electronic shifters without interruption.

What is the user sentiment for the L-TWOO app?

The eStep APP has an average rating of 3.5 stars from 6 ratings. This suggests a mixed but generally positive user reception.