Just wanted to get this out to anyone if they'd like to bookmark it. This will allow you to figure out rpm and speed based on any setup you have or are thinking of going to such as tire/wheel change of size, change in primary gear ratio, change of final drive ratio, or complete transmission gear changes. They have a database of some bikes but not very many but you are able to input whatever you want up to three different setups to compare at the same time.

I have no affiliation with this site. It just happen to be extremely useful in my search of considering a 30 tooth pulley change.

http://gearingcommander.com/