Welcome to HDF!
My wife and I had bottoming problems with my old Glide and even new Ultra owners also complain. Riding solo almost any rear suspension units seem OK, but as soon as we ride 2-up many of them are found wanting. My solution was custom-built Ohlins from HDF sponsor Motorcycle Metal. We haven't bottomed out once since fitting them!
'Sir' Graham 5P
s, #1 Gent! Dude?
Harley owner since 1974, Founder & Life HOG Member.
1990 Officially 'Hyacinth' Blue FLHS/2008 S&S V107T, 2007 Buttercup XB12R, 2011 Merlot XL883L, MG ZT V8 281cid.