3Racing SAK-D4841/PK Sakura D4 1.9 Rear Gear Ratio Upgrade - Race Spec  [SAK-D4841/PK]

Race Oriented Rear Gear for Tuning Precision

The 3Racing Sakura D4 Rear Gear Transmission in a 1.9 ratio is developed to assist focused setup changes on the Sakura D4 chassis. Targeted at competitive drivers, this rear gear supports precise gearing choices to refine traction and exit acceleration while maintaining mechanical reliability under track loads.

How the 1.9 Ratio Affects Setup

A 1.9 ratio alters the torque curve in favour of improved midrange output, which helps with traction management and corner exit acceleration. Use it as part of a setup package to balance gearing with suspension and tyre choices for consistent lap performance.

Fitment Considerations and Quick Checks

Install the gear directly into the Sakura D4 rear transmission and verify backlash and mesh using standard gauges. After fitting, perform initial shakedown runs and monitor drivetrain noise, motor current, and temperature to ensure the ratio change does not overstress other components.