Originally Posted by CafeRacer
Thats a pretty cool program but it doesnt go high enough. I need somthing that goes up past 200 RPM
Since the RPM:speed ratio is constant you can just figure out the speed change that 10rpm creates, and then do the addition.
For example, I plugged in 50x15, 167.5 cranks, and 700cx23. I observe that for every 10rpm the speed increases 2.6 mph. Though 160 rpm is the max (and gives me 41.7 mph), I can calculate that at 210 rpm, my speed will be 41.7 + (5 X 2.6) = 54.7.
Inconvenient if you want to look at several different gear combinations or whatever, but all the data is there.