Originally Posted by
unworthy1
Hitachi investment-cast BB shell. This is very interesting if the tubeset is actually 531 Red Label "Pro". and given the frame bits...might be an American Custom. the headlugs are very minimal, what some call "bikini lugs". subscribing for the updates!
Thanks
unworthy1 "Bikini Lugs" is a new one for me. Other than the sticker decals claiming "531 Pro" and it coming in as a light bike when weighed, surely there must be another way to confirm the tubing is what it claims it is??