EDS TX Electronic Rear Derailleur

Driven by a built-in 800mAh rechargeable battery at 8.4V, the EDS TX rear derailleur shifts instantly on a button press — zero cable lag, zero stretch over time. Compatible with 7 to 14-speed cassettes from 10T to 36T, speed configuration set entirely through the WHEELTOP app. The standard pulley wheel uses a 12-tooth positive/negative tooth profile for quieter, more secure chain engagement. Charges through a magnetic Pogopin connector — snap it on, no port covers, no corrosion.

7-14 Speed, Set in the App

Unlike mechanical derailleurs locked to a fixed speed count, the EDS TX lets you define your speed range and per-gear position through the WHEELTOP app — matching it precisely to whatever 7-14 speed, 10-36T cassette you're running.

Carbon Fiber Hollow OSPW Pulley Wheels

Oversized pulley wheel systems (OSPW) reduce the chain's wrap angle around each pulley, which means less chain articulation per revolution and measurably lower friction across the full drivetrain. The EDS TX OSPW rear derailleur runs the same 800mAh electronic platform as the standard TX, upgraded with carbon fiber hollow oversized pulley wheels — lighter than standard, stiffer under load, and noticeably smoother under hard pedaling effort.

Same Platform. Carbon Fiber Upgraded Pulleys.

The TX OSPW shares the same 800mAh battery, Pogopin charging, BLE/ANT+ wireless, and app configuration as the standard TX rear derailleur. The performance gain comes entirely from the carbon fiber hollow oversized pulley wheel system — no learning curve, no setup difference.

Why Oversized? The Chain Wrap Angle Difference.

At 12 teeth, the OSPW pulleys are physically larger than a conventional jockey wheel — letting the chain bend through a gentler arc at each engagement. Less arc per revolution means less per-link articulation friction across every pedal stroke. The hollow carbon fiber construction removes mass from the pulley body without sacrificing torsional stiffness, keeping the drivetrain quieter and more responsive under load.

Precise Front Shifting on Demand

The EDS TX front derailleur runs on its own built-in 600mAh rechargeable battery and shares the same 8.4V system, magnetic Pogopin charging, and BLE/ANT+ wireless link as the rear unit. Pair both derailleurs to the WHEELTOP app for synchronized setup, gear mapping, and live status — front and rear shift in concert with a single button press from the lever.

Shift with a Button. Brake with the Lever.

A press of the shift button sends the command wirelessly straight to the derailleur — no cable pull, no mechanical play to wear in. Each lever runs on a single CR2032 button battery, swappable in seconds without tools. The Rim Brake Carbon Fiber, Disc Brake Carbon Fiber, and OSPW Carbon builds use carbon fiber lever bodies; the Disc Brake Aluminum build uses an aluminum lever body for a more planted, budget-friendly feel.

① Derailleur Cage

② Brake Lever

Build 1

Rim Brake — Carbon Fiber

Carbon fiber lever body paired with rim brake calipers. Available in 1X (single chainring, no FD) or 2X (double chainring, FD included). The lightest of the standard builds — ideal for riders on classic rim-brake road frames.

Build 2

Disc Brake — Carbon Fiber

Carbon fiber lever body with hydraulic disc brake calipers included — full ceramic pistons, CNC unibody construction. Available in 1X (single chainring, no FD) or 2X (double chainring, FD included). Best all-round build for modern disc-mount road and gravel frames.

Build 3

Disc Brake — Aluminum

Aluminum lever body with the same hydraulic disc brake calipers included. Available in 1X (single chainring, no FD) or 2X (double chainring, FD included). A more rugged, value-oriented option for disc-mount frames. Comes with standard 12T pulleys.

Upgrade

Build 4

OSPW — Carbon Fiber Hollow

Replaces the standard 12T pulleys with carbon fiber hollow oversized pulley wheels. Currently offered on Rim Brake and Disc Brake Carbon Fiber builds, each in 1X or 2X.

CNC Unibody. Built to Run Cool.

The caliper body is CNC-machined from aluminum alloy as a single unit, ensuring rigidity and long-term safety under hard braking. Shark-fin heat sinks on the caliper body increase surface area for better heat dissipation, slowing down thermal fade on long descents. A unidirectional oil circuit prevents brake fluid from flowing backward, keeping lever feel sharp and response quick.

Full Ceramic Pistons

Full ceramic pistons resist high heat and hold a consistent bite point ride after ride — no fade, no spongy lever after a long climb or fast descent.

Per-Gear Fine Adjustment

Dial in every sprocket individually. If one gear feels off, adjust it directly in the app without touching the bike - a precision that cable systems simply can't match.