I don't want to take much of your time but as you may know my frame bolt was stolen last week and I'm finding these things are *hard* to replace....
So anyway - I managed to get hold of a new 3/8" bolt that basically fits fine apart from the fact the frame still flexes because it doesn't have an 'thread gap' (for want of a better description) in the threads halfway up the shaft like the original one did. This gap (I think) gives enough space for the two threaded surfaces to be properly drawn together before it is properly tightened.
Basically - What I'm asking is if any of you that have a proper bolt could have a look at my diagram below (drawn from memory) and help me out (as accurate as possible) with my missing dimensions:
a = full height of bolt
b = height of threaded area above thread gap
c = height of thread gap
d = height of thread below thread gap
If I know these I can machine (aka dremel/file) the thread off in the appropiate area and get the bike feeling solid again. As apposed to the feeling of riding a bowl of Jello.
Maybe even a hi-res pic posted here would be helpful too..!?!?
My sincere thanks in advance to anyone that can help!