Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
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If you have access to a automotive bearing press, you can use a Dremel, file or even a chisel to remove most of the inner rim of the more damaged lockring, then supporting the frame by the BB shell, press the entire cartridge out. Then you have easy access to remove what's left of the rings. This can be easy or difficult depending on how corroded they are, and you'll adjust the technique accordingly.
If you don't have access to a press, it's basically the same, but you'll use a short length of pipe braced on an anvil or heavy vise to support the edge of the BB shell, and drive the BB spindle by brute force hammering.
With either technique, the amount of force depends on how thoroughly you remove the bearing support rim from the lockring. Stock up on beer, it may take a while.
An ounce of diagnosis is worth a pound of cure.
“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin
“One accurate measurement is worth a thousand expert opinions”
- Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance