Tamiya 15355 JR PRO High Speed Gear Set - MS Chassis 4:1 Tuning Kit  [15355]

Snapshot of the Tamiya 15355 High Speed Gear Set

The Tamiya 15355 JR PRO High Speed Gear Set is aimed at Mini 4WD enthusiasts wanting sharper launch and roll-out on MS chassis machines. Its 4:1 gearing favours acceleration through flowing and tight sections where speed retention after corners is important.

Fitment Notes and Track Behavior

This gear set is engineered for the Mini 4WD PRO MS chassis only. If you find the factory 3.5:1 gear ratio losing drive on technical tracks, switching to the 4:1 set improves responsiveness. It works best when combined with higher-revving motors such as the REV-Tuned.

Included Parts and Use Cases

The kit contains two G19 (blue) counter gears and two G20 (orange) spur gears. Use these as replacements for aged gears or as part of setup trials to tweak acceleration without replacing the whole car. It is a practical, budget-friendly way to tune your race setup.