# RC Gear Ratio Picker

> RC car gear ratio information and calculator for Tamiya, Kyosho, and Yokomo. (iPhone/iPad app by SIA Inc..)

- Source: https://appshunter.io/ios/app/rc-gear-ratio-picker/id660646168 (this page in markdown: same URL + `.md`)
- Developer: [SIA Inc.](https://appshunter.io/developer/354974421)
- Category: Utilities, Reference
- Price: $0.99 with in-app purchases
- Rating: 1.00/5 from 3 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 7.0 · 1 MB
- Languages: English, Japanese
- Released: 2013-06-28
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/rc-gear-ratio-picker/id660646168/reviews.md

## What is RC Gear Ratio Picker?

RC Gear Ratio Picker is the Utility-App where is convenient for RC fan who can refer to a gear ratio from the Spur and Pinion gear of RC Car.

It has two functions. 

- Gear Ratio Information
  The main chassis of TAMIYA correspond in the present version. 
  The figure of motor mount is also attached about some chassis. 

  Ver 1.0.0 supports following chassis
  -- TAMIYA
    F102 F103 F104 F201
    TA01 TA02 TA03 TA03F PRO TA03R
    TA04
    TA05 TA05 M-Four TA05 VDF TA05 VerII TA05 VerII R 
    TA05-VDF2 Drift Chassis
    TA06 TA06 Pro
    TB01 TB01 evo3 TB01 evo5
    TB02 TB02R
    TL01
    TT01
    TT02 540Motor TT02 380Motor
    TRF414M
    TRF415 TRF415 MS TRF415 MSX TRF415 MSXX
    TRF416 TRF416X
    TRF417
    M03 M04
    WR02
    FF01 FF02
    DF02 DF03
    XV-01 XV-01 PRO XV-01T XV-01TC PRO

- Gear Ratio Calculator
  In the present version, it corresponds to the some chassis of KYOSHO, TAMIYA, and YOKOMO. 

These data is due to be increased one by one. 
If there is a chassis of hope, I will hope to connect from the inquiry form of an application support web site. 

== DISCLIMER ==
This application uses the data which collected information uniquely. 
Therefore, any guarantees, such as the completeness of the contents to offer, accuracy, and safety, are not offered. About the damage that occurred to users, I do not take any responsibility
Please use it by your own judgment, inspection.

## Key features

- Gear Ratio Information
- Gear Ratio Calculator
- Supports Tamiya chassis
- Supports Kyosho and Yokomo chassis
- Motor mount information
- Data for multiple chassis

## Pricing and in-app purchases

Base price: $0.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Cancellation of function restrictions | $0.99 | one-time |


## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/rc-gear-ratio-picker/id660646168/reviews.md

### 1/5 — Worst app I've ever downloaded..

*2014-02-22, version 1.0.0*

It really makes no sense.. Nothing is labeled other than in some code bull.. Please take this app down or make it usuable for all Makes of RCs..

### 1/5 — Useless

*2013-07-27, version 1.0.0*

This app is completely useless unless you purchase the paid app.

### 1/5 — Dont Bother

*2013-07-14, version 1.0.0*

Calc does the same thing.

## Frequently asked questions about RC Gear Ratio Picker

### What is RC Gear Ratio Picker?

RC Gear Ratio Picker is a utility app designed for RC car fans to conveniently reference and calculate gear ratios using spur and pinion gears. It provides information for specific Tamiya chassis and calculation support for Tamiya, Kyosho, and Yokomo models.

### What chassis does RC Gear Ratio Picker support?

The app supports a wide range of Tamiya chassis including F102, F103, TA01, TA04, TA05, TB01, TL01, TT01, and M03, among others. It also corresponds to some chassis from Kyosho and Yokomo for gear ratio calculations.

### How accurate is the data in RC Gear Ratio Picker?

The application uses uniquely collected data. However, the developer offers no guarantees regarding the completeness, accuracy, or safety of the content. Users are advised to use the app at their own judgment and inspection.

### Can I request support for a specific RC chassis?

Yes, if you have a desired chassis that is not currently supported, you can request it through the inquiry form on the application support website. The developer plans to increase the supported chassis data over time.

### What devices is RC Gear Ratio Picker available on?

RC Gear Ratio Picker is available for iPhone, iPad, and iPod touch devices. It is compatible with iOS devices.

### How much does RC Gear Ratio Picker cost?

RC Gear Ratio Picker is a paid application. It is priced at $0.99.

### When was RC Gear Ratio Picker last updated?

The latest version of RC Gear Ratio Picker, 1.2.0, was last updated on May 21, 2014. The app was initially released on June 28, 2013.

### Does RC Gear Ratio Picker have ads?

The provided data does not specify whether RC Gear Ratio Picker contains advertisements. However, it is a paid application, which often implies an ad-free experience.

## Version history (last 1 release)

### 1.2.0 — 2014-05-21

bug fix

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## More apps by SIA Inc.

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All apps by SIA Inc.: https://appshunter.io/developer/354974421

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*