Hello guys, I am new here =) After looking everywhere on Google, I have decided to create an account and give this a shot! I am trying to understand the concept of Torque generated by a gear box (simple gearbox with 2/3 gears, nothing fancy). I understand that changing the gear ratio changes the Torque of a gear box. More specifically, one creates a reduction gearbox, the Torque increases. Ok then, now I am wondering: Keeping in mind this formula: T = I [tex]\alpha[/tex] where T= Torque, I = moment of Inertia, and [tex]\alpha[/tex] = angular acceleration Does it mean that if one changes the moment of Inertia of a gear the Torque changes too?! More specifically, does it mean that one could increase the Torque being produced by a gearbox by simply increasing the Area/Size of the gears itself (with no need of changing the ratio)? Thank you for your time, and please let me know if I need to make this any clearer! Regards N19!