I have the 430 shocks with the standard springs. I'm looking for help with locating heavy duty springs. I've contacted progressive twice with no reply's.

 

They always reply to phone calls and ship quickly.

 

Call them up. Youll get your answer.

 

Are 412 heavy duty 12 inch shocks enough for around 420lbs 2up ride.i dont ride 2 up very oftet it is mostly 100miles weekend trip.i ride iron 883 2014

 

I pondered all this as well, and went with Road King air shocks. The handling and ride are both better, and can easily add air for 2 up riding. I weigh 180 and wont say what momma weighs but we don't approach the weight you mentioned. However, the RK shocks are up to it and easier to adjust, especially if you have saddlebags.

I Td my air lines together and put the air valve up front by the coil. About 10 quick pumps with the HD hand pump and am set to go. just another option.

 

What length of shock are you looking for?