The HDs I looked at today are in the 23+ range. I think the f6 is a loser hell some quick release on the glides trunk and you got the same bike basically. Maybe for those who are really squeezing to get a wing type bike.....IDK we'll see.
What you own is your own kingdom, What you do is your own glory
What you love is your own power, What you live is your own story
In your head is the answer, Let it guide you along
Let your heart be the anchor, And the beat of your own song.......Neal Peart