Originally Posted by DannoXYZ

Easy way to measure fork-rake is to stick a broomstick into the steerer and have it extended down between the dropouts. I have one that coincidentally is 22.2mm and fits exactly into the centre of the steerer with no wobbles. Then insert a bare axle or big screwdriver between the dropouts. Using calipers, measure C-t-C distance between axle and broomstick (normal to broomstick).