Thinking of doing a 1250 conversion on my wife's 2011 Iron. Was wondering if after the conversion the highway cruising would feel more relaxed. Considering a pulley change as well but not crazy about the speedometer being off after ward's.

 

Speedo can be calibrated.

 

I did an NRHS 1250 conversion to my 883. I did not do a pulley change, so the RPM's are the same, but it is not working nearly as hard to cruise at 70, 80 or even 90 mph.

It will easily handle the higher gearing of a pulley change, and then be working even less to cruise. As Von_Zipper said, the speedo can be re-calibrated.

 

I've attached the screenshot of my calculator, speedo variable with 30T pulley. This is good for ThunderMax, not sure if stock ECM uses the same.