Xmax

I have a pair of drivers (CSS Trio8) In their specs, they do not have an Xmax parameter, but instead have two related parameters, "Linear coil travel" and "Maximum coil travel"

Is there a way of determining the Xmax based on these or other parameters?

The above parameters have the following values;

Linear coil travel - 28 mm peak to peak
Maximum coil travel - 38 mm peak to peak

My initial thought/assumption is that the driver has a 14 mm Xmax, but I thought I would ask the assembled experts here.

What say ye?

Paul