Old 03-14-21, 10:02 PM
Jeff Wills
Insane Bicycle Mechanic
Jeff Wills's Avatar
Join Date: Mar 2008
Location: other Vancouver
Posts: 9,547
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 678 Post(s)
Liked 318 Times in 210 Posts
Originally Posted by cbrstar View Post
You are using a NOS tange set? I'm wondering if somehow the cups are missmatched. One side is English and the otherside is ISO? Iso is just very slightly larger.
One side English and the other side Italian? Possible if the threads were stripped at one point and the stripped side was retapped Italian. Very, very unlikely though.

I'd also consider that that frame might have been dropped and the bottom bracket shell is slightly ovalized.

In either case, the way to salvage the frame is to have an experienced frame person run taps into both sides. As with many things, one definitive measurement is worth a thousand Internet opinions.
Jeff Wills

Comcast nuked my web page. It will return soon..
Jeff Wills is offline