Ok, here's the tech type stuff on the 412's, if you're gonna put sportster 412's on our bikes you gotta go with the heavy duty ones. The standard sportster spring rate is 20 pounds less per spring than the ones for our bikes which is fine if you weigh 140, but I've been to a couple of rallies and I think most of us are pretty north of that number. The heavy duty sportster shocks are 5 pounds heavier per spring so in my opinion that's an acceptable difference. The only other difference is travel, our springs have a travel of 9.3ish and the sportster heavy duty shocks have a travel of 9.1ish also an acceptable difference in my opinion. You do need to get the america/speedmaster bushings because the sportster ones are too big. Both Eddy and Brent can get you exactly what you need from progressive. I know all this off the top of my head because I just spent several hours on the phone with Eddy, Beth from progressive, Eddy again, Beth, Eddy, Beth, ect. Trying to get what I wanted, which was 1" lower rears in black, which progressive does not make for our bikes, so after a lot of investigation I got all the specs and made my decision from there.
