Following the theft of my trusty Dahon Mariner, I've recently bought a used Tern Link D8. The original owner did some nice upgrades (better derailleur and seat post), and I'm thinking of my own changes. One thing that's bugging me is that on the D8 the Physis stem collapses to the outside of the folded bike where on the Mariner it tucks in between the two halves.
I know the Physis is a Tern selling point, an awesomely stiff handlebar post, "massively strong, precision machined design that virtually eliminates flex. Four new patented technologies go into the design." That said, it's a little short, it doesn't extend, and it doesn't tuck in for easy carrying. The lower-end Tern Link C7 also tucks in, which got me wondering.
I've started researching the various handlebar posts. ThorUSA.com stocks a lot of Dahon and Tern handleposts, and this site has a lot of just Dahon-brand items . But it seems this may not be an straightforward replacement.
Can I just swap out the handlebar post of a d8 for a c7's? Do I need to replace other parts on the front as well? Will a Dahon telescoping post fit? Again, it looks like there's a lot of options; it's just hard to make sense of what will actually fit.
Thanks for the advice.
What I have:
What I want: