Rowland Cook

Rated 3.00(1) — Rowland Cook

Cyculator - The Cyclists calculator.This software contains 3 formulas that are useful to cyclists.1) Gear ratio calculator (in inches)2) Spoke length calculator3) Vertical dropout chain stay length calculator for bikes with vertical dropouts for those...

Rated 3.00(2) — Rowland Cook

The application displays measurements (In feet, Inches and Meters) between any two selected points on a Roller derby Track.It displays a Roller Derby Track on the screen with 45 key Points as blue dots. By selecting any two blue dots the application...

Rated 4.36(39) — Rowland Cook

This application contains videos of the current Roller Derby Referee hand signals as of 1st Jan 2013.There are three ways to view a hand signal.1) Select 'Play All' and all of them will be played one after the other.2) Select 'Penalty by Type' will provid