Brother has a 2015 Limited and is interested in replacing the rear air shocks with the new shocks that are on the 2017 touring bikes which can be dialed in to adjust firmness. Anyone here know if the shocks from a 2017 Street Glide would fit a 2015 Limited. Tks.
You asked if they will fit, to which the answer is yes! Limited shocks are 13" tall, SG ones are shorter, around 12" tall. It is common to swap the two lengths between models. If your brother wants the same length as his current ones, then pass by on the SG ones. There are probably similar spec longer versions available. You may find the H-D website helpful, as they offer alternative shocks and give details - go to the Shop tab and enter details of your brother's bike.