Dear Listers:
If someone spreads the rear stays on a vintage 60s/70s frame - Columbus tubing - to accommodate a 7/8/9 speed modern cassette, how much is the frame integrity compromised? Assuming it is done 'properly' but a pro bike shop, can one assume the frame will retain its rigidity and 'ride', or is it a terrible idea? I am considering purchasing an old frame built by one of the Italian Masters, and am concerned by this adjustment made by the owner.
Thanks all.
Greg arnold nyc