Why are you changing the rear spring?
Easier than going on a diet!
LMAO......I thought about changing my spring on my 11 LX and then on my Adventure but I was too cheap. My dealer actually talked me out of it. I go 275 and have the spring set for about 230 and the sled rides like a dream. You are supposed to set it about 25 lbs under your weight anyway so an extra 20 or so did not hurt the ride at all. If you do change it make sure you grease up the shock threads good. You might even check into the thrust bearings/washers the 11 and 12's have on now and add them.