The measurement was 0.2mm and I probably have maybe 150 miles on it which I agree isn’t much at all which is why I think it’s so strange. My grandpa helped me out with all the measurements because he has worked on loads of bikes in his years. But he did measure it properly. Could it be something to do with compression because it is pretty bad compared to the old cylinder I don’t have a gauge but it doesn’t take much force to turn over vs the og cylinder took quite a bit of force.