It's tricky for me to measure. I've not seated the rear axle fully into the dropouts, don't know why I've done that. I think it was something to do with a clearance issue when I was using an X-RF5 high-flange shell, but now I have an S-RF5 so it's pointless. Anyhow, it increases the length of the measurement from axle to bridge. It appears to be around 220 on my bike but if the axle were fully in the dropout that length would be shorter.