I've heard Tange bottom bracket cups can be removed on both sides, although I've never heard any direct confirmation of this. To be more specific these ones : https://www.benscycle.net/index.php?m...th=188_247_680 Would anyone be able to confirm that this is true? Or even the IRD (made by Tange) Square Taper bbs?

He's talking about cartridge bottom brackets.

I think that's the same as this:
https://www.biketoolsetc.com/index.cg...d=TA-LN3968113

I'm pretty sure both cups come off the cartridge, but it might be worth it to email Bike Tools Etc. or Bens Cycle if it's something that you really need answered. If you're just curious, I'd say put the BB in and go for a ride.

What is it that you're trying to do? Install the BB? Or replace the bearings in the BB?

I was looking for a cartridge bb with removable cups so i could fit it with some phil wood rings into an old jeunet. I'm all good now, talked with yellow jersey and I have what i need to make this work. Benscycle said they were not removable I guess not all tange bbs have removable cups, any way yellow jersey hooked me up.

What is Yellow Jersey hooking you up with?

With a tange cartridge bb with both cups removable, guess i could have said that instead of hooked up.