I stretched this Twin cam softail frame and mounted the gas tank, a few months back for Free souls @ecarrington666 went up 8 inches, it has 10 over fork tubes. I sat on it and it feels really comfortable! The bike behind it belongs to 50 + year member Outsiders Pig pen and is an Evolution softail with a 4 inch stretch with 6 over fork tubes. I did not stretch Pig pens frame.