Bicycle Mechanics - switching out frame - compatibility

I have a road bike that has always been slightly too big for me and I'm considering getting a new frame and swapping over all the parts.

It is a 1998 Cannondale with Shimano 105 throughout. Carbon fork, threaded quill stem.

I'm wondering what would/would not fit if I picked up a new frame.

- Wheels. Spacing should be fine, correct?
- BB. Is an older Shimano UN square taper English threaded BB going to work on a new frame? Lots are "press fit" frames, right?
- Fork. Is an old threaded for going to work on a new frame?
- Seatpost. Hmm, have they change post diameter?

Okay, I know there are a thousand variables here, depending on the frame I pick up. Say I grab something that is a few years old, from Cannondale or Trek. Just running over the possibilities in my head.

I'm thinking the biggest issues will be the BB and the fork/stem/headset...

You won't be able to use your 1" threaded fork on the vast majority of modern frames (well non-slow frames) as they're all either 1 1/8 or integrated. Which means new fork either way. I'd ditch the threaded setup anyways.

The only thing you have to watch out for bb sizing is whether or not it takes the new BB30 standard - which is press fit. Again, most high end frames will have either choice with the regular english threaded bb shell frames being much more popular - for now.

Seatpost, who cares. It's a $15 part. Wheels fine.

Hmm, okay...

1) wheelset = transferable

2) fork = need a new one (which means new stem + bars, not a big deal)

3) BB = so if I avoid the press fit BB30 I should be able to use my BB + crankset?

Frame spacing should be 130mm, right? So my crankset/chainline should be on.

Hmm, if I only need a new fork, stem, bars...this could be a good idea. Even for a back up/bad weather bike, I don't like riding a TT that is too long.

Thanks, operator.

Hmm, okay...

1) wheelset = transferable

2) fork = need a new one (which means new stem + bars, not a big deal)

3) BB = so if I avoid the press fit BB30 I should be able to use my BB + crankset?

Frame spacing should be 130mm, right? So my crankset/chainline should be on.

Hmm, if I only need a new fork, stem, bars...this could be a good idea. Even for a back up/bad weather bike, I don't like riding a TT that is too long.

Thanks, operator.

As long as you match the clamp diameter (likely 26mm) you'll be able to reuse your bars. Your frame has an English bottom bracket which the vast majority of new frames come with so that shouldn't be an issue either.

Unless the frame comes with one, you will need a new headset. You might also need a new front derailler if you currently have a clamp-on and the new frame has a different size seattube (very likely). If you have a braze-on, you're set as worst case all you have to buy is the appropriately sized clamp-on adapter.

Hmm, okay...

1) wheelset = transferable

2) fork = need a new one (which means new stem + bars, not a big deal)

3) BB = so if I avoid the press fit BB30 I should be able to use my BB + crankset?

Frame spacing should be 130mm, right? So my crankset/chainline should be on.

Hmm, if I only need a new fork, stem, bars...this could be a good idea. Even for a back up/bad weather bike, I don't like riding a TT that is too long.

Thanks, operator.

2) fork should come with the frameset, if you are going that route
3) You're looking for a frame featuring an english shell. Not more can be said about that

A lot of what you can reuse depends on how smart you choose the frame your transferring to. You will inevitably need to buy some components that have variable size. Things like seatposts, seat collars, clamp on derailleur sizes etc.

Cannondales of that vintage used 27.2mm seatposts, so there's a good chance you'll be able to re-use that too, assuming the length is adequate.