A little background. I have an 09 Irin that I've done all my own work on over the past the years. Bars, cables, stage one, etc. Anyway, after three years of doing all the work and service I decided to let Nick's Cycles in Wiliamstown, NJ give it a once over and also change the tranny sprocket to a 1200 29 tooth and put in Progressive fork springs. I was hoping the two mods would lower my RPM's on the highway and make the ride better so I don't cringe when I have a big bump coming up. Both the springs and the sprocket did exactly what I was looking for! The bike doesn't jump off the line like before but It takes off like a bat out of hell once you gain a few RPM's. The Progressive springs are simply amazing! It feels like a much different bike now. I'll wrap this up with a question for you all. I have 12" Street Glide shocks with 0 psi on my Iron. Would switching to 12" Progressive 412's improve the ride any further?

 

I did the progressives in the front a while back, and I agree the ride is much better. Just recently installed the Burly 10.5 shocks and was not expecting a smoother ride but it made the ride even smoother with the Burly shocks over the stock shocks! So thinking the 11" Progressive would help.