# RC-DD ROLLOUT

> Super easy index calculation with the list of tire diameters

Canonical page: [https://chrome-stats.com/d/com.willplant.ddrollout](https://chrome-stats.com/d/com.willplant.ddrollout)

## Overview

- **ID:** `com.willplant.ddrollout`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** WILL PLANT
- **Category:** TOOLS
- **Downloads:** 239
- **Version:** 1.0.1
- **Last updated:** 2022-06-28
- **First published:** 2022-06-19
- **Publisher country:** JP
- **Data as of:** 2026-09-13
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.willplant.ddrollout)
- **Website:** [https://willplant.tv/](https://willplant.tv/)
- **Privacy policy:** [https://willplant.tv/app-policy/](https://willplant.tv/app-policy/)

## Description

An app designed for index calculation of direct-drive cars is now available!<br><br>This application helps you perform the exponential calculation of machines with variable sponge tire diameters like F1 and 1/12 racing cars.<br><br>* The index means the distance traveled when the motor makes one revolution.<br>If the index is 50, one motor revolution advances 60 mm.<br><br>Unlike the gear ratio, the value changes when the tire becomes smaller.<br><br>Shifting to low gear (high gear ratio), <br>・ Fast acceleration <br>・ Maximum speed does not increase <br>・ The burden on the motor reduced<br>・ Battery load reduced and driving time extends<br><br>Shifting to high gear (low gear ratio),<br>・ Slow acceleration<br>・ Maximum speed increases<br>・ The burden on the motor increased<br>・ Battery load increased and driving time decreases<br><br>Please note that there are recommended gear ratios from the manufacturers of the motor and ESC.<br>Feel free to make use of it for your RC life!

## Rankings

- #1,644,407 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/com.willplant.ddrollout)