Sugino 75 - quick question please

Once you get to 1mm+/- you are talking a tiny % deviation over the distance between chainring and cog.

Your choice of cog (different thicknesses),how hard you tighten your crankbolts and how thick the sideplates of your chain are also going to make the same tiny teeny difference to the mythical "perfect" chainline.

Sheldon says 110.5mm ISO taper is fine, as is 108mm ISO and you can adjust Phils anyway

http://sheldonbrown.com/bbsize.html

Cheers fella. I guess my next question is (seeing as they're both adjustable) is it better to go for a longer spindle and adjust in or go for the shorter to adjust out? I have no idea how to install bottom brackets so wouldn't know if there were any practical advantages in choosing a particular size over another.

I get what you say about tightening crankbolts, etc and realise that the differences are minimal. I still need to choose one over the other though and I'm trying to be methodical in my choice! :)

As for cog choice I was going to go for EAI. Does that eliminate any of the above?

Mike, have a butcher's at dasmiller's setup.

BC recommended the 110.5, and after my recent headaches I'd have to agree that the longer spindle is a winner.

Can't remember which frame you're using, but it may make a difference. Chainstay clearance on Pimperella is so tight that moving the BB across to get chainline wouldn't be an option. If you have slimmer steel stays this would be less of a problem.

EAI has a fairly broad shoulder, so you'd be looking at moving the BB towards the drive side relative to a slimmer cog like the CONdor CNC one. There's only a mil and a half in the difference, though.

If you're not fully confident, perhaps a visit to BC is in order?

Then if it all goes horribly wrong it's their fault, not yours!

Anyone know cheapest place to get some black 75's and a chainring?

Would prefer a 2nd hand pair but urgently need a pair as only fixed got stolen recently.

Thanks but already sold I'm afraid