I've got the rocket Tourer , I had the same issues , could'nt reach the floor , in fact it got that bad i was going to trade it on a road king , Anyway last ditched effort , i put on the ikon shockers which dropped the rear 35 mm, We then lowered the front , through the triple tree 25 mm.
Anyway end result , I can reach the floor flat footed , gives me heaps more confidence in the tight slow riding , with the missis on the back its a lot easier now the centre of gravity is lowered ,
And the biggest plus i believe the bike handles better in the twisties , All in all the best money i've spent on the bike