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For any modelcar driver/mechanic, is fundamental to know the ratio and/or rollout on the car setup, for optimal performance of the battery and motor.

With RcRatio, you can calculate quickly and easily the values for ratio, rollout, and max speed. Also you can get the charts for ratio and rollout.

You only need to set some values like spur, pinion and internal ratio to get the data.

Also you can save your settings for later reference.

It works for speeds on MPH and KMH, you only need to set up on the settings menu.

It's on english and spanish.