Originally Posted by
kyselad
Really, that's just the best advice. It's easy to give it a quick check, and there's info on Sheldon Brown's site regarding how to measure everything. Be aware that you may not have non-standard bottom bracket threading:
http://cyclespeugeot.com/Threading.html. If it's not ISO, hold onto those bottom bracket cups if you find you need a different spindle length.
Fortunately, the BB shell is English threaded. I'm familiar with Sheldon's brilliance, having set up my other FGs according to his instructions. But today I wondered if the double was the best (and fastest) route to chainline happiness. Given everyone's helpful advice, I'll now assume it is.
Thank you.