This part of ISO 5775 specifies rim dimensions for bicycle tyres: it gives only those rim contour dimensions necessary for tyre mounting and to fit the tyre on the rim.
ISO 5775-1 and ISO 5775-2 cover straight side (SS) rims, hooked bead (HB) rims and crotchet type (CT) rims.
The annex presents methods for checking dimensions of straight side rims and hooked bead rims.