I had a set of White bros lowering blocks on an ol 91 FLHS when they frist came out in the early 90's. by moving the shocks back you change handling and they rubbed the paint on the bags...took em off and ordered a set of lowered air shocks that were meant to fit a FXFT, of the same era...worked like a charm, When my bike was new and under warrenty, the right side shock leaked its fluid out....Harley would only replace the one defective shock, I wanted to put the lowered shocks on at that time...so a little motor oil on the other one, and they decided to replace both....i had them ordeer the lowered shock as the replacements, there was a slight cost differnce of about ten or fifteen bucks i had to pay, I have hadthe lowered air shocks on for 7 years now and never have had a bottom out or top out problem with them