Originally Posted by
Sixty Fiver
... An eccentric bb and vertical dropout is nice solution but does add cost as a decent eccentric will add costs and they are not totally problem free and more complex than a conventional bottom bracket...
I love the idea of eccentric BBs for the one fact that it puts to use all of the outdated/obsolete ashtabula BBs that were re-marketed in a more exclusive/profitable fashion.
As for vertical dropouts, they were a nice addition to bikes that had derailleurs and would allow wheel removal/installation without the need to readjust the rim brakes but when it comes to IGHs, (IMHO) horizontal dropouts are the better choice over eccentric BBs.