Dyna Glide ModelsSuper Glide, Super Glide Sport, Super Glide Custom, Dyna Glide Convertible, Super Glide T-Sport, Dyna Glide Police, Dyna Switchback, Low Rider, Street Bob, Fat Bob and Wide Glide.
Standard. I had HD 412s and they were harsh and I'm 230 lbs. I sent them to progressive and had them swap the springs to standard and they were much better.
I got the heavy duty I weigh 212 and got the 412s 11.5 inch long and they beat me to death on the first setting took them off and put them on the self went with 12 inch street glide air shocks
I had the 412 HD in 11", my a$$ never sat in the seat, every bump it was in the air! HD springs are meant for some one +250lbs.
Replaced them with the 444 with standard springs, much better and enjoyable ride.
You should not need HD springs up until at least 250lbs is what I was quoted by progressive. I weigh 180 and the std springs were already stiff as hell with 11.5" shocks.
I have the 444 Heavy duty. I never have rode two up. I weigh 170. I have the pre-load set about half way. I think it rides awesome. Everyone that rides it thinks it is too stiff. It sucks up the bumps really well.