I've got a few BB spacers from the random boxes in the workshop just in case.
In that case just play with spacers untill things line-up.
I find it tricky to measure chainline (just how do you decide on the centre of the hub to say 0.5mm accuracy?). So I used a spirit level.
With the bike hanging from a front wheel hook on the wall, I made sure the top tube was 100% perpendicular with good old planet earth. I then checked the chain, adding or removing spacers, untill toptube and chain were as paralell as possible. Probably a stupid way of doing it, but it worked for me.
In that case just play with spacers untill things line-up.
I find it tricky to measure chainline (just how do you decide on the centre of the hub to say 0.5mm accuracy?). So I used a spirit level.
With the bike hanging from a front wheel hook on the wall, I made sure the top tube was 100% perpendicular with good old planet earth. I then checked the chain, adding or removing spacers, untill toptube and chain were as paralell as possible. Probably a stupid way of doing it, but it worked for me.