Hello. I am in the process of calculating the brake fluid volume in the reservoir. I have a front disc and rear drum brake system. While the piston travel is clear for the disc brake, my question is related to the drum brake wheel cylinder piston travel. Assuming that the liner wear is 8 mm, should I consider the wheel cylinder piston travel to be 8 mm or is it higher considering that the wheel cylinder is usually at the top and might have to travel more in order to compensate? If it is higher, how to calculate the exact travel?