LTWOO eRX eR9 V3.0 2x 10 11 12-speed Electric / Hydraulic Disc Brake Electronic Groupset, Road Electronic Groupset

LTWOO eRX eR9 V3.0 2x 10 11 12-speed Electric / Hydraulic Disc Brake Electronic Groupset, Road Electronic Groupset

LTWOO eRX eR9 2x 10 11 12-speed Electric / Hydraulic Disc Brake Electronic Groupset, Road Electronic Groupset, Replaceable battery, APP programming carbon fiber aluminumeR9 is alloy, eRX is carbon fiber. this is the main difference between them. Other functions are same between them.

Technical Specifications

Warranty 1 year.

Any time can contact us if any quality defects or technical support need.

The latest version of v3 eRX in 2025

Pulley Material: Injected Carbon Fiber

Bearing Type: Ceramic bearings

Gear shape: wide and narrow teeth

Please make sure that the brake calipers for flat mount and 70mm post mount are compatible with the frame before purchasing.

The LTWOO hydraulic brake calipers are incompatible with 74mm post mount, and no any adapters can achieve this.

• eRX V3 Updates:

  Re-engineered shifters with significantly enhanced grip ergonomics

  Relocated charging port to front derailleur (TYPE-C interface)

  Eliminated water-ingress risks from rear derailleur’s magnetic charging port

  Upgraded to 10,000 RPM motor derailleur:

  Increased thrust force

  Faster response speed

  You can choose 2x12s or 2x11s by connecting to the APP

  Installation video tutorial:https://www.youtube.com/watchv=FaWp7IBWs7s

eRX V3 Updates:

Re-engineered shifters with significantly enhanced grip ergonomics

Relocated charging port to front derailleur (TYPE-C interface)

Eliminated water-ingress risks from rear derailleur’s magnetic charging port

Upgraded to 10,000 RPM motor derailleur:

Increased thrust force

Faster response speed

eR9 V3 Updates:

Relocated charging port to front derailleur (TYPE-C interface)

Eliminated water-ingress risks from rear derailleur’s magnetic charging port

Upgraded to 10,000 RPM motor derailleur:

Increased thrust force

Faster response speed

The only difference between eR9 and eRX is the material of the shifter lever and rear derailleur cage:

eR9 is aluminum,

eRX is carbon fiber mix with aluminum.

Both them are Hydraulic Disc Brake Electronic Groupset

eRX model

2x10-12-speed

The LTWOO flagship road electronic shifting model is designed for competition. It features a lightweight carbon fiber build, easy L-TWOO APP connectivity, and precise shifting. The integrated caliper and DISC hydraulic brakes offer improved heat dissipation. Choose the eRX for a streamlined, high-performance ride.

eR9 model

2x10-12-speed

Designed for top performance and reliability. Made from high-strength aluminum alloy with a lightweight design. Supports L-TWOO APP connectivity for an easy and efficient ride. The split caliper ensures stability and reliability. Ideal for those new to electronic shifting.

There is no brake oil in the package. As ship oil is difficult by air. Brake oil this groupset use is mineral oil, you can buy brake oil from bike store around your home.

Available Options

Each row below is one available option combination. Choose the complete combination that matches your setup.