Hip Hop Skid Bikes / Hipster Sleds / HHSB

753 yes. And it is funny you ask only because it was always a right mutha to change the rear wheel. The bridge basically wouldn't allow the bak wheel much further forward in the track ends than what you see in the pic. So as soon as you loosened off the rear wheel nuts and turned the cranks to remove chain the wheel would always jam itself on to the bridge. A 700 wheel could never be slammed.

What made you ask?

My Dave Russell is 753, has what looks to be identical fastback stays, is pretty lightweight and used to be a TT frame, it is missing the original fork and instead has a gazelle track fork.