Originally Posted by Airhead Wrangler
To my eye, that looks pretty close to dead center. If not, it's still definitely less than 32mm.
It's definitely not dead center. I'm building one a the moment, if you wan't to use a 140 rear tyre you will end up with about 15mm offset.
That is with the swingarm moved as far as possible to the right, and the engine moved to the right also.
The guy who has build my rear wheel used the HPN sport specs for offset.
If you go the monolever route, you will probably end up in the same ballpark, to use a 140 tyre the wheel needs to be spoked out of center 10mm or more.