Z-table > change pulley calculation

Hey,
i am not an engineer so please apologize the question: I was wondering how i can change the pulleys which are used for the z lift table. Currently there is a 48 tooth and a 20 tooth pulley connected with a 101 mxl belt. Am i right that this is a ratio of 2.4? What if i took a 15 inch pulley and a 36 inch pulley. This would also be 2.4. Does this change anything besides the center distance? What happens if i use another belt (like 100). Would this change anything in the system which i should take into consideration? I know there is something like teeth in mesh but i have no idea what that means.
thank you!
tm
i am not an engineer so please apologize the question: I was wondering how i can change the pulleys which are used for the z lift table. Currently there is a 48 tooth and a 20 tooth pulley connected with a 101 mxl belt. Am i right that this is a ratio of 2.4? What if i took a 15 inch pulley and a 36 inch pulley. This would also be 2.4. Does this change anything besides the center distance? What happens if i use another belt (like 100). Would this change anything in the system which i should take into consideration? I know there is something like teeth in mesh but i have no idea what that means.
thank you!
tm