# BMX Gear Calculator

> BMX gear calculator and interactive chart for offline use. (iPhone/iPad app by Shane Jenkins.)

- Source: https://appshunter.io/ios/app/bmx-gear-calculator/id665859954 (this page in markdown: same URL + `.md`)
- Developer: [Shane Jenkins](https://appshunter.io/developer/665859957)
- Category: Utilities, Sports
- Price: $1.99
- Rating: 3.60/5 from 9 App Store ratings · 15 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.0 · 1 MB
- Languages: American English
- Released: 2013-07-02
- Data updated: 2026-08-24
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/bmx-gear-calculator/id665859954/reviews.md

## What is BMX Gear Calculator?

Many years ago at bmxultra.com we started to develop a gear chart and a gear calculator specifically for BMXers that could be used on the web, so no matter where you were, providing you had an internet connection and a browser, you could access them. Of course over the years they have changed somewhat. Now the calculator produces an interactive gear chart, which sounds very complicated but couldn't be easier to use. Not only that though, the calculator can give you exact roll out for Tioga PowerBlock tires and many other popular tires. 

Since we use it a lot ourselves we are very proud of what we have been able to produce and how popular it is.

Every now and then, while at some tracks we found that internet connections on the phone were very slow making the gear calculator a little difficult to use. It's been a long time coming but we finally have our first iPhone/iPad app, the BMX Gear Calculator

- the BMX specific gear calculator that works anywhere, anytime
- no internet connection required
- compare multiple gears in a simple chart on the one screen
- includes:

 Tires Listed

Tioga

PowerBlock 20×1.75
PowerBlock 20×1.60
PowerBlock 20×1.40
PowerBlock 20×1.95
PowerBlock 20×1 3/8
PowerBlock 20×1 1/8
PowerBlock 24×1.40
PowerBlock 24×1.60
PowerBlock 24×1.75
PowerBlock 24×2.1
Comp 3 20×1.75
Comp 3 20×1.50
Comp 3 20×1 3/8
Comp 3 20×1 1/8
Comp 3 24×1.75
Comp 3 25th 20×1.75

ITS

Micro Knobby MK2 20×1.75
Micro Knobby MK2 20×1.50
Micro Knobby MK2 20×1 3/8
Micro Knobby MK2 20×1 1/8
Micro Knobby MK2 20×1
Micro Knobby MK2 24×1.75
Micro Knobby MK2 24×1.50
Micro Knobby MK2 24×1 3/8
Micro Knobby MK2 24×1 1/8
Micro Knobby MK2 24×1

Maxxis

DTH 20×1 1/8
DTH 20×1 3/8
DTH 20×1.75
DTH 20×1.5
DTH 24×1.75
Torch 20×1.75
Torch 20×1.5
Holy Roller 20×1.75
Holy Roller 20×1 3/8
Holy Roller 20×1 1/8
Holy Roller 24×1.85

Alienation

TCS R1 20×1.60
TCS F1 20×1.95
Differential 20×1.75
Graffiti TCS 20×1.85

Kenda

Konversion 20×1.75
Konversion 20×1.65
Konversion 20×1.50
Konversion 24×1.75
Konversion 24×1.50
Kompact Folding 20×1.75
Kontact Folding 20×1.75

VeeRubber

Speedster 20×1 3/8
Speedster 20×1 1/8
Speedster 20×1.50
Speedster 20×1.6
Speedster 20×1.75
MK3 Foldable 20×1
MK3 Foldable 20×1 1/8
MK3 Foldable 20×1 3/8
MK3 Foldable 20×1.50
MK3 Foldable 20×1.75
MK3 Foldable 24×1
MK3 Foldable 24×1 1/8
MK3 Foldable 24×1 3/8
MK3 Foldable 24×1.50
MK3 Foldable 24×1.75
MK3 Foldable 24×1.85

IRC

Siren 20×1 1/8
Siren 20×1 3/8
Siren 20×1.50
Siren 20×1.75
Siren 24×1.75

Arisun

XLR8 Foldable 20×1.50
XLR8 Foldable 20×1.75
XLR8 Foldable 20×1.95
XLR8 20×1 1/8
XLR8 20×1 3/8
XLR8 20×1.50
XLR8 20×1.75
XLR8 20×1.95
XLR8 24×1.75

And if your specific tire is not listed you have two options

Generic sizes

16×1.75
18×1.75
20×1 1/8
20×1 3/8
20×1.50
20×1.75
24×1 1/8
24×1 3/8
24×1.75

Custom

Measure up the outer diameter of your rear wheel and work out your rollout

## Key features

- BMX specific gear calculator
- Offline functionality
- Interactive gear chart
- Accurate roll-out calculations
- Extensive tire size list
- Compare multiple gears

## Chart rankings

- #171 in Top Paid · Utilities (US App Store)

## Recent user reviews (10 of 15)

All indexed reviews: https://appshunter.io/ios/app/bmx-gear-calculator/id665859954/reviews.md

### 1/5 — Not worth it

*2023-03-14*

What’s the point junk

### 1/5 — Layout

*2022-01-09*

Saddened by layout and ease of operation like web page. Also don’t see rollout like on web page. I’ll be heading to web page. $1.99…ehh

### 4/5 — limited

*2021-11-16*

OS20 and 22” are rising in popularity, so many questions on line about gearing... this App has limited os20 tires (tioga only) Also it’s annoying when the tires you have on your bike aren’t listed - But if you have popular race tires, 20” class or 24” cruiser it’s a great

### 5/5 — Great app

*2018-04-15*

I use this app all the tome to check roll outs

### 2/5 — Meh

*2017-07-25*

Use it on my desktop all the time and it's dialed. Was a little bummed to see the app version is missing a ton of tires and sizes.

### 3/5 — Needs update

*2016-08-10*

Hasn't been updated in over two years. Lots of new tires and sizes now that aren't included in the calculator.

### 2/5 — No option to save/load data

*2016-06-20*

Really disappointed. No option to save/load data like the website version has. No point in buying app. Please add this feature to app version. Comes in handy when you have 4 racers in the family. You should have it the other way around, no option to save data for website version and option for paid supporters with app.

### 5/5 — Fantastic

*2014-12-07*

Really good solid app, needs to updated to match the website with the new tires though

### 5/5 — So handy

*2014-05-15*

I got a stack of BMX's including 22" and 24" wheel bikes. This app is great for comparing gearings for racing and sprint training, and also keeping my street/race/dirt bikes feeling the same weather I have big race cogs or little ones.

### 4/5 — BMX Gear Calculator

*2014-05-15*

Simple , effective and easy to use. Being only a recent purchase for myself I wondered how I ever did with out it seeing as I run different brands of tyres on both of my bikes , and also highlighted the fact that my son is now pushing way too hard a gearing just by changing tyre brands.
Make the selection windows bigger and BANG 5 stars I reckon ....very handy , great app :) !!!

## Frequently asked questions about BMX Gear Calculator

### What is BMX Gear Calculator?

BMX Gear Calculator is a utility app designed for BMX riders to calculate and compare gear ratios. It provides an interactive chart and works offline, making it convenient for use anywhere.

### Does BMX Gear Calculator require an internet connection?

No, BMX Gear Calculator does not require an internet connection to function. This allows users to access its features and perform calculations even when offline.

### What kind of tires are supported by BMX Gear Calculator?

BMX Gear Calculator supports a wide range of tires from brands like Tioga, ITS, Maxxis, Alienation, Kenda, VeeRubber, IRC, and Arisun. It also includes generic sizes and a custom option.

### How does BMX Gear Calculator compare multiple gears?

The app features an interactive gear chart that allows users to compare multiple gear combinations on a single screen. This helps in visualizing and selecting the best gear setup.

### What is the price of BMX Gear Calculator?

BMX Gear Calculator is a paid app, available for $1.99. This one-time purchase grants access to all its features without any recurring fees.

### On which devices can I use BMX Gear Calculator?

BMX Gear Calculator is available for iPhone, iPad, and iPod touch devices. It is designed to be compatible with Apple's iOS ecosystem.

### How often is BMX Gear Calculator updated?

The app was last updated on November 6, 2017, with version 1.6.1. While updates may not be frequent, the core functionality remains stable for its intended purpose.

### What is the age rating for BMX Gear Calculator?

BMX Gear Calculator has an age rating of 4+. This indicates that the content is generally suitable for all ages, with no mature themes or potentially inappropriate material.

## Version history (last 5 releases)

### 1.6.1 — 2017-11-06

This update from Apple will improve the functionality of this app. No new features are included.

corrected tire data

### 1.6 — 2017-11-05

- added presets;
- supported iPhone X screen

### 1.5.1 — 2017-05-29

- added icons for iPad Pro and iPhone 6/7 Plus

### 1.5 — 2014-04-09

- added more brands and tires
- added custom option for tires that are not listed
- added application state restoration
- converted to iOS 7 look
- minor changes

### 1.1 — 2013-07-14

- added new tire brands (Alienation, Kenda, VeeRubber) and tire sizes
- fixed small bug

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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 2026-08-24.*