Quote Originally Posted by m_c View Post
Big thing that jumps out to me, is you're using pulley diameters, not number of teeth.
Although diameters will give you a rough calculation, it's not going to give you an exact one.

You also need to count the teeth on the pinion, and find out what pitch the rack is.
Ahhh i see. Rough calculations for now is fine but yes ill count the teeth. Also what difference does the amount of teeth on the pinion make? I thought it was just the outer diameter (circumference) of the pinion that sets the speed?