Fumbles22

Hello,

I'm currently working on my second summer bike project. This is a bit harder than my previous one since I don't have all the pieces.

Here's the frame:

https://i116.photobucket.com/albums/o...ps0d282f13.jpg

The frame size is 23 inches, and the seat post size is 31.8mm. I hope this gives an idea of size.

I'm thinking of buying this bottom bracket, this front derailleur, this chainset and possibly this rear derailleur.

I'd like to know a few things:

1). How do I know if my frame, bottom bracket and front derailleur will fit together? My previous project involved a bike similar to this and I needed to put a spacer between the bottom bracket and the derailleur.

2). Since my seat post is 31.8mm, will I need a 31.8mm front derailleur or a 34.9mm size? I only ask because I would be measuring outside where-the-seat-post-fits instead of inside for the actual seat post?

If someone could let me know, that would be great. I can try and do some accurate measuring if you like!