Dual Drive gear ratio calculator.

[bangkok]

Anybody know a website with an engine for gear ratio calculation for Sram Duakl-Drive and/or Shimano Integro?

Or, does the Sram 3 speed hub have the same ratios as thatused with the Dual Drive? If so I can figure it out.

[Sammyboy]

Sheldon Brown has the Dual Drive on his gear calculator. Enter your cassette and chainrings as normal, and use the "Internal Gear Hub" option at the bottom to choose Dual Drive.

http://www.sheldonbrown.com/gears/