Bottom bracket weep holes
10-09-21, 08:38 AM
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Bottom bracket weep holes
I've got a steel frame roadie stripped for painting. I notice similar later frames from Giant have holes in the bottom, I assume for drainage. My frame's bottom bracket does not have any holes and was badly rusted.
Should I drill a couple of weep holes in the bottom bracket?
Should I drill a couple of weep holes in the bottom bracket?
10-09-21, 09:27 AM
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Rusted outside or inside the bottom bracket? If outside, no need to. If inside, you could use a wire brush to remove the rust scales and clean, and then brush in rust converter, primer, paint, grease or a combination of them to protect the bare metal. Some have a weep/drain hole, but on most late 80's-on bicycles it is to screw on a plastic cable guide. You could drill one if wanting to, but could void the warranty if it is still valid.
Last edited by Juan el Boricua; 10-09-21 at 09:31 AM.
10-09-21, 05:24 PM
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Rusted outside or inside the bottom bracket? If outside, no need to. If inside, you could use a wire brush to remove the rust scales and clean, and then brush in rust converter, primer, paint, grease or a combination of them to protect the bare metal. Some have a weep/drain hole, but on most late 80's-on bicycles it is to screw on a plastic cable guide. You could drill one if wanting to, but could void the warranty if it is still valid.
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10-09-21, 11:57 PM
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I always drill two holes on bikes that don't have any drain holes. Better to let the water out.
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10-10-21, 05:49 AM
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I have an old hybrid bike that I have had to replace the bottom bracket bearings on twice, they were rusted, presumably from me washing the bike... Then I noticed the holes in the bottom bracket of a road bike I picked up, I drilled out the BB on the hybrid several years ago and no issues since.
10-10-21, 06:29 AM
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There's certainly no warranty issues if I drill a couple of holes! 😉
