Looking at Hendees bicycle geometry from the axle plates and the angle of the stays etc , theres measurements and angles that are repeated thru the years and some not .

Its easy enough to measure diamond frames from pics but measuring the neck angle might be a bit dodgie , I thought maybe there was a standardised angle like eg 80 degrees or 85 degrees as opposed to 81 , 82 ,83 , 84 etc increments or minutes ! .....surely not

basically all I have to go by is pics of Hendee bikes