2025 LTWOO eRX Electronic TT Groupset

The LTWOO eRX TT is a fully wired, electronic shifting groupset designed for time trial and triathlon racing. Purpose-built for aerodynamic setups, it features blip-style shifters, a low-profile control unit, and precise 10–12-speed drivetrain compatibility. Carbon components and advanced hydraulic brakes ensure responsive, efficient performance even under pressure.

Key Features:

• Electronic blip control (10–12-speed compatible)
• Carbon fiber rear derailleur cage (11T–32T max range)
• Oversized pulley upgrade option available
• Shimano-compatible hydraulic disc brakes
• Serial Channel bleeding & Egg Roll cooling
• Ideal for TT/Tri cockpits with minimal drag

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🔹 Shifters & Brake Levers

• Type: Electronic Blip System 
• Material: Carbon Fiber
• Side: Left / Right pair
• Braking Mode: Hydraulic disc
• Speed Compatibility: 10–12-speed
• Weight: 296g (pair)
• Notes: Designed for time trial/triathlon setups with dedicated blip ports and minimal cockpit interference

🔹 Electronic Controller

• Control Method: Wired blip input
• Speed Compatibility: 10–12-speed
• Material: Composite plastic
• Compatibility: eRX-specific
• Weight: 109g (pair)
• Notes: Central routing hub for all electronic components in the TT setup

Front Derailleur:

• Speed: 2-speed
• Max Chainring Size: 56T
• Chainline: 43.5–44.5mm
• Weight: 140g
• Shifting: Wired electronic
• Material: Lightweight alloy
• Design: Optimized for smooth chainring transitions in aero setups

Rear Derailleur:

• Speed Compatibility: 10–12-speed
• Max Cassette Range: 11T–32T
• Weight: 270g (292g with oversized pulley wheel)
• Materials: Aluminium body, carbon fiber long cage
• Features: Internal damping and locking, wired electronic shifting, optional oversized pulley for reduced drivetrain friction

Braking System (included)

• Type: Hydraulic Disc
• Rotor Compatibility: 140mm / 160mm
• Caliper Weight: 277g with (with pads) (pair)
• Pad Type: Shimano-compatible
• Cooling Technology: "Egg Roll" fin system
• Maintenance: "Serial Channel" internal bleed system for easier servicing

Why Choose This Groupset?
The LTWOO eRX TT groupset delivers the benefits of precise wired electronic shifting in an aero-focused package. Ideal for time trialists and triathletes, it integrates seamlessly with blip-style shifters while providing excellent gear range support, efficient braking, and the option for oversized pulley wheels for drivetrain optimization.

What’s Included in the Box?

• Rear Derailleur (standard or oversized pulley)
• Front Derailleur
• Brake Levers with Electronic Blips (L/R)
• Hydraulic Calipers (pair)
• Central Electronic Controller
• Mounting Hardware
• User Manual