The Whoopie Deux is Bike Friday’s version of a safety rail for passengers on the rear deck.
With the addition of a seat back, it is not a big deal that the Whoopie Deux is open at the back. When we first got ours, I mounted the lateral brace at the back of the deck as I’ve seen it installed on other Haul a Days.
It turns out that this has other advantages. One is that it makes it easier to tow all sizes of bikes, even one with a front rack.
Even though I don’t really carry passengers much anymore, and even when I do, they don’t take safety that seriously ;), I think I’ll hold onto the Whoopie Deux.
(photo: D. Guthrie)
Update: Davey Oil of G&O Family Cyclery informs me that “it comes with a horizontal bar that closes the loop now. doesn’t seem like you want or need that, but maybe you should update the info on your blog?”
and I see this now in this picture from the Bike Friday website, where there is a note saying that the rear bar can be removed to accommodate kid seats. I see also that they’ve made the front part of the mount independent of the seatpost, which is another nice upgrade.