Comprehensive bicycle gear calculator

* 7 Different tabs to choose from: Road, MTB, Touring, Sram-1X, Cyclo-X, BMX and Manual - *Note you do need to scroll to see all the tabs*

* Calculations options are: Roll Out in metres, Roll Out in inches, Skid Patches, Gear Inches, km/h, mph, Ratio and Gain Ratio

* Adjustable cadence from 60 to 120 rpm for speed calculations

* Bike specific categories with drop down lists of cranks, cassettes and tyres

* Road category includes optional roll out limits for school racing

* Manual entry option, freely enter any gear combination, ideal for fixies and unique bikes

* Manual entered C/rings and sprockets are automatically saved

* 6 bike profiles on the manual tab

* BMX calculations includes nearest alternate chainring/sprocket combinations

* Database of over 150 tyre sizes

* Option to share your calculation by email or your preferred messaging app, mechanics share your recommended gearing with your customers

For free version
https://play.google.com/store/apps/details?id=com.andrew.Gear_Calc_Free