Rebuilding my Ti456 as a singlespeed and want to run it without a tensioner. I know the magic ratio isn’t the whole solution, but getting something about right would be a good start (using the magic ratio calculator) and then take up the slack with an EBB (retrofit EBBs only adjust max 0.25″ so need to be close to a magic ratio without using half links).

So, I can measure the chainstay and will be roughly right but is the exact right length known?