Review - Bicycle Gear Calculator for iPhone / iPod Touch

Every fixie rider likes to have a gear ratio chart to look at every 5 minutes, if you also happen to own an iPhone or an iPod Touch then you can fork out £2.99 for a great app called Bicycle Gear Calculator by a developer (and fixie rider) named Jean-Pierre Martineau.

From his site: "Evaluate current or potential Gearing Ratios, calculate Gain Ratios, Gear Inches, and Development. Use the Skid Patch Analyzer to visualize and minimize your fixed-gear's tire wear. Explore equivalent gearing configurations that let you reuse parts you already have."

This seems like a pretty perfect app to me, it has everything you could possibly need. The only thing that's not so great is the £2.99 price tag which is pretty steep for this kind of app. At the end of the day though this is waaaay better than a jpg in your Photos folder and costs a penny less than the awesome "16 cans of Diet Coke for £3" offer that I took advantage of in Asda today. Check out the screengrabs below.


Gear and Crank selection


Tire selection


Skid Patch Visualizer


Speed Analysis


Alternate Gearing
For loads more info visit the developers site here then click on his link to go and buy it in iTunes, you wont be sorry!