Do you want to try it?
I think I have a new 45 here. Probably a 42 as well.
I'm 5'9" and 215.
With 14/50 I was hitting 56mph tops on level ground measured via GPS. I was not trying to blow up the motor while attempting this.
I'm at 14/47 now. Have to try it off road. May go back to a 50.
Got plenty of bikes here to ride on the street, and no local off road spot that I can ride to, so I really don't need the 45 or 42.
Let me know.