LTWOO RX Disc 2x12 Speed Road Bike Hydraulic Disc Brake Groupset Carbon & Alloy Version Capability with R7170 R8170

RX Road 2x12 Speed Hydraulic Disc Brake Groupset

Notice

The original LTWOO RX Disc packaging is oversized and significantly increases shipping costs (approximately USD 40–50).

To help you save on shipping, we offer a "Without Original Box" option. The price difference reflects the reduced shipping cost only—both options include the same product, accessories, and warranty service. Please purchase with confidence.

Version Guide

The shifters and rear derailleurs come in two versions:

Carbon Fiber:

Lighter and offers finer shifting. Best for experienced riders seeking maximum speed and weight savings.

Aluminum Alloy:

Focuses on tactile feel and durability. Ideal for long-distance riders.

Carbon Fiber Version

Aluminum Alloy Version

Package Components

LTWOO RX Right Shifter ×1 (Shifting cable included)

LTWOO RX Left Shifter ×1 (Shifting cable included)

LTWOO RX Rear Derailleur ×1

LTWOO RX Front Derailleur x1

LTWOO Caliper x2 （Includes Brake Hoses, Flat Mount Adapters & Mounting Hardware）

Shift Lever (Carbon)

Material: Carbon fiber brake lever.

Operation: Dual Shifting Paddles

Shifting Cables: Pre-Installed Cable

1x19 High-Strength Stainless

Precision Die-Cast Head

Weight：~285g / each

Shift Lever (Aluminum)

Material: Aluminum Alloy brake lever.

Operation: Dual Shifting Paddles

Shifting Cables: Pre-Installed Cable

New LTWOO hoods for enhanced grip. Enlarged downshift lever contact area, ideal for long-distance rides.

Weight：~310g / each

Rear Derailleur（Carbon）

Three-spring design delivers balanced cassette engagement, greater adjustability tolerance and simpler setup.

Speed: 12 Speed

Compatible Sprocket: Minimum 11T / Maximum 34T

Pulley Wheels: The Tension Pulley features positive and negative teeth to ensure smooth shifting and prevent chain drop.

Cage Material: Carbon fiber outer cage paired with aluminum inner cage for optimized weight savings and durability.

Weight: ~226g

Rear Derailleur（Aluminum）

Two-spring construction minimizes chain slapping against the frame, enables crisp and responsive gear shifting, simplifies internal components for enhanced robustness and reduces routine maintenance needs.

Speed: 12 Speed

Compatible Sprocket: Minimum 11T / Maximum 34T

Pulley Wheels: The Tension Pulley features positive and negative teeth to ensure smooth shifting and prevent chain drop.

Cage Material: Aluminum alloy inner and outer cages deliver outstanding strength and extended service lifespan.

Weight: ~255g

Front Derailleur

maximum compatible sprocket: 56T

Installation type：Down pull Directly install

Total capacity：16T

Installation angle (°): 61-66

Chain line (mm)：43.5-44.5

Weight：~100g

Excellent Frame Compatibility

The front derailleur features an integrated cable housing stop, making installation easier on frames without a dedicated cable housing mount and improving overall compatibility.

Quick Cable Tension Adjustment

An external tension adjustment screw allows fine-tuning of cable tension without re-clamping the cable or using an inline barrel adjuster, making setup and maintenance faster and more convenient.

Hydraulic Brake Calipers

Manufactured from a single CNC-machined body, the caliper offers increased stiffness and more even force distribution.（Includes hydraulic hose and brake adapter）

Reduced caliper flex under braking

More direct braking force transfer

Consistent and linear braking feel

Improved braking stability and control

Dual-Way Hydraulic Bleeding System

The dual-direction hydraulic oil circuit improves fluid circulation efficiency and helps eliminate trapped air more effectively.

High-Wear-Resistance Bar-Type Brake Pads

Equipped with bar-style composite brake pads designed to balance heat dissipation and wear resistance.