Trek 5200 (USPS) - Bottom Bracket threading
 

I may move from Dura Ace 7700 to either DA-9000 or Ultegra-6800 on a 2001 Trek 5200 OCLV 120 (USPS). Does anyone know (1) what kind of bottom bracket threading was used on these earlier OCLVs or (2) whether there could be compatibility issues? I'm nagged by a thought that the earlier OCLVs used unique threading, but this thought might be baseless (or relate to something about headsets on earlier OCLVs, not BBs). Thanks! - Stan

This should be moved to Mechanics, but I can answer it here:

Those Treks used a standard BSA threading.

Thanks, caloso! Sorry for miscategorizing - this was my first post to the forum and didn't realize what I was doing. I searched how to delete this post and repost in the right discussion forum but could not discover how to do this. Perhaps this is something the admin has to do.

Yes. Somebody will do that shortly. Welcome to Bike Forums!

All set!

Rare is the bike not using British threaded BB.. the Mfgrs Dropped All but BSC And Italian.

Should be standard English threading. Especially if it's already equipped with DA...

I had a 2000 5200, which came stock with Ultegra 6503, which was an excellent group but I didn't need the triple here in pancake flat Sacramento. The best upgrade I ever made was to the DA 7800 crankset.

Now I see that you can get a whole 6800 group for $650 from the UK websites. That's a super deal. It'll be like having a new bike.

Thanks, everyone, for the warm welcome and feedback to my questions!

Hi everyone - I just purchased the DA 9000 crankset for the 2001 Trek 5200. I'm told the DA bottom bracket is pressed cup, not threaded, so won't work with my vintage frame. But isn't this the product I'd need - "Bottom Bracket Shimano Dura-ace Bb-9000 English 68mm" (which is available)? Are there different sizes for spindle width?

DA 9000 can be used with a press fit set up, but what you will need for the 5200 is this:
https://www.amazon.com/Shimano-Dura-.../dp/B00J4XU0MC

It will screw in to your 5200 and adapt the crankset to your frame. Spindle width is controlled
by the built in axle on the crankset. There is a spacer or two with the crankset to
adjust/fine tune the fitting.

Thanks! Is there any reason this crank should not fit a 5200 with spacers in your mind?

It will fit fine, don't over think it. IIRC the spacer is just for fine tuning and may not be needed.
On one bike (Lightspeed analogous to your Trek, 2001 model) I think I took a piece of plastic
that covered the bearing opening outside the BB on the L off, on another I fit a narrow spacer
on the axle inside the R crank between the crank and BB to get a better chain line, both used BB similar to
the DA I referenced. The axle slides into the BB from the R side and the L crank clamps onto the
axle splines. If there is any slop left when the L crank is fully seated, you may want to try a spacer.
Last time I did this was 3 and 5 yrs ago so I may be explaining in less than full mechanic mode.
Shimano has all tech docs on line readily available and you can look at www.parktool.com under repair
for more info.

You should not need to install any bb spacers for a road crankset on a 68mm threaded frame.