Sprockets Help with Gear ratios

Discussion in 'Transmission / Drivetrain' started by MartinNZ, Aug 17, 2013.

  1. MartinNZ

    MartinNZ New Member

    Hi all,

    I've be planning to make a chainsaw powers bicycle for a while now, but I don't know what to do for Gear ratios... The motor I am using is a 45cc chainsaw that has max rpm of 1000. i will be mounting it on a 26 inch mountain bike, using chain drive to get the power to the rear wheel. I understand that use the sprockets from the front peddles is a effective way to gear down from the motor(the bike is a 21 speed, three on the front, six on the back).

    If anyone with more knowledge than me could help that would be much appreciated.

  2. MartinNZ

    MartinNZ New Member