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Bicycle Gear Calculator — Bike Gears app for iPhone and iPad

4.3 ( 9563 ratings )
Utilities Sports
Developer: JPMartineau
4.99 USD
Current version: 2.0.3, last update: 1 year ago
First release : 15 Jul 2008
App size: 468.32 Kb

Summer Sale: 40% OFF to celebrate Bike Gears being featured in the App Stores "Apps for Cycling" section.

Designed by a cyclist, for cyclists, Bike Gears is the premier Bicycle Gear Calculator for the iPhone/iPod Touch. Calculate Gear Ratios, Gear Inches, Development and Gain Ratios using your bikes measurements. The app now has over 200 preset tire sizes and also lets you enter your own custom tire size for personalized measurements.

Building a new bike from scratch? Test out possible configurations and get it right the first time.

Find equivalent gearing configurations to reuse components you already have, or even to save weight by using smaller gears!

Want to convert your old hardtail into a single speed? No problem: take a ride on a geared bike to tweak your gear ratio, then calculate the equivalent ratio for your single-speed. Best of all, it doesnt matter if they have different tire sizes!

Enjoy skidding on your fixie? Using the Skid Patch Analyzer, you can visualize your tires wear spots and choose optimal gearing to maximize your tire longevity!

No more what-ifs, no more guestimating, and most importantly, no more costly mistakes.

Bicycle Gear Calculator is a must-have for bike builders, bike mechanics, athletes, coaches, BMX riders, commuters and alleycat racers alike! But dont take my word for it – read the reviews and see what cyclists like you are saying.

Pros and cons of Bicycle Gear Calculator — Bike Gears app for iPhone and iPad

Bicycle Gear Calculator — Bike Gears app good for

Good apps to simulate ratios, skid patch etc. Too bad there is not a single tutorial, I hope it will be in the next update.
Nice little thingy, especially for singlespeeder, that heavent found their optimized setup, yet. Would be nice to have additonal Wheelsizes in 20, 24 and 26 inches. :)
Good work. So cool to see a bicycle app for the iPhone. Cheers
This app is very well done. I especially like the gear ratio calculator. Very handful when you want to stay at a specific cadence. Good work
A must have for all the DIY community bike kitchens out there. Great for building a fixie.
As a cyclist and iPhone owner this is the best App I have downloaded. Very useful since I also do all my own wrenching.

Some bad moments

Major gear ratios missing and plenty of tires not accounted for. No good at all IF youre actually a cyclist.
Great app, but can we get some more 24" tire sizes? Us BMXers use 24x1.75 or bigger in the cruiser class.
This was a waste of $5. It doesnt account for any cog bigger than 36. This app would be great but falls very short for my immediate needs. I cant believe Im the first to ask for this which leads me to think this has disappointed lots of mountain bikers.
The app locks up requiring frequent restarting. Sorry I bought it.
Inexplicably, the speed slider disappeared and ceased to work, making the app moderately worthless.
Very disappointed. Bought full version but speed slider and cadence adjuster disappeared making the app totally worthless. Waste of money at this point