Like a good bottle of wine, or easter candy you took out of your kid's basket, I've been saving this one for a special occasion. Natalie and I were at Cured getting coffee and I spotted this single speed CX commuter converted to belt drive:
Rally Team USA
You may not know this, but the Raleigh Team USA was not originally set up as a single speed with a belt drive. Crazy, I know. In order to run a belt drive, you have to be able to thread the belt through the rear triangle. This means the frame has to have a break in it.
Here are some examples of factory frame separations to allow for a belt drive:
On the seat stay
Near the top of the seat stay
On the dropout
This person must really like this Raleigh, because they built a gap into the frame themselves. They cut the seat stay, and then stuck some kind of rod inside, and then bolted the whole thing back together:
Frame Break diagram with bad cropping
Would that change the spacing for the rear end? Probably! but the integrity of this bike has already been compromised, and it's steel! It can bend a lot better than carbon. One last parting shot.