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Help, How to avoid or minimize bottom Bracket Rust ?(5 posts)

Help, How to avoid or minimize bottom Bracket Rust ?Maartin
Mar 3, 2003 5:41 AM
In the process of rebuilding my Trek 5200 OCLV I found that my bottom bracket was totally rusted out (the sealing bearing case)in one year. I strip and rebuild all parts, grease etc each winter. I use the bike daily to commute rain or shine (lots of rain days). Is there anything that can be done ? I think water was getting in through my Icon seatpost which I am replacing with an Easton EC70. Should I use teflon tape to help seal the BB threads. Should I remove the seatpost and hang the bike upside down at night after rain days ?
re: Help, How to avoid or minimize bottom Bracket Rust ?MR_GRUMPY
Mar 3, 2003 6:05 AM
I've got an old Bianchi that does the same thing. I solved the problem br removing the screw that holds the plactic bottom bracket cable guide on. With the cables on, it can't come off, and the hole allows the water to drain out.
re: interesting ideacyclopathic
Mar 4, 2003 1:40 PM
since your frame is steel you can waterproof it/worked for me. Grease seatpost, BB shell threads, water bottle mount bolts. Squirt frame saver into frame and esp chainstays.
re: Help, How to avoid or minimize bottom Bracket Rust ?curlybike
Mar 3, 2003 7:14 AM
The road water is thrown onto the seatpost and runs down the sides of it, onto the split where the clamping action is and into the bb shell. Changing seatposts won't change that. Make sure that you periodically remove the seatpost and clean it and grease it, or it might get stuck due to corrosion. Turning the bike upside down allows the water to fill up the seatpost, most of which do not have a hole for water to drain out of. Removing the seatpost would resolve that, But much of the water would run down the down tube to the headset or down the chainstays. The best action is to add a drain hole to the bb shell. You can remove the bottom screw and drill a hole through the center of it. That way you retain the use of the screw.
Try ThisFORT-Cyclist
Mar 4, 2003 3:46 PM
it's a piece of a tube. ca 20 mm diameter.