i had to get into this one.i bought a grand jubile new in 1975 when i moved to santa cruz ca. i road it for hundrds of miles through yhe mountains,cub traing rides centurys.it was great in every way eccept i weigh 198lbs and am not a spinner on up hills.the 531 tubing wasnt up to me and i would flex the bottom bracket.i still have a 82 grand record and ride it often.nice bikes,keep it together.kurt skelton eureka,ca.