There are several ways to measure roadbook holders capacity : number of A5 sheets, paper roll lenght and thickness, at least.
We opt for the roadbook roll thickness method and we use it in all our roadbook holders specifications. We choose it because it's more accurate as it is independent of the paper thickness, roadbook type (roll or separated sheets) and the way they are glued.
If you need to convert paper rolls thickness into A5 sheets, please use the graphic below.
(click in the image to enlarge).
Note we used 80 gr/cm2 A5 paper sheets glued edge to edge with scotch tape. For other kind of paper or glue method, please consider compensation need.