Bottom Bracket Swimming...Alu Frame.
- NATURAL ANKLING
- Posts: 13780
- Joined: 24 Oct 2012, 10:43pm
- Location: English Riviera
Bottom Bracket Swimming...Alu Frame.
Hi,
Cant remember when I last had a looksee.
Whats the solution to this
I have repacked with underwater grease I think as the label has come off the tin.
But the design fault is a pocket thats left between the BB (unthreaded portion) and the straight BB frame tube
Or is it comming in from other frame openings ? could be the seat tube......will have to check that over
No drain holes, would that be better than filling the gap with some plastic tube and packing with grease
Cant remember when I last had a looksee.
Whats the solution to this
I have repacked with underwater grease I think as the label has come off the tin.
But the design fault is a pocket thats left between the BB (unthreaded portion) and the straight BB frame tube
Or is it comming in from other frame openings ? could be the seat tube......will have to check that over
No drain holes, would that be better than filling the gap with some plastic tube and packing with grease
NA Thinks Just End 2 End Return + Bivvy - Some day Soon I hope
You'll Still Find Me At The Top Of A Hill
Please forgive the poor Grammar I blame it on my mobile and phat thinkers.
You'll Still Find Me At The Top Of A Hill
Please forgive the poor Grammar I blame it on my mobile and phat thinkers.
Re: Bottom Bracket Swimming...Alu Frame.
Water gets in at the top of the seat tube and via any breather holes in the chain stays. Its why Hollowtech II BB and similar have a tube with rubber seals between the cups. The prevent ingress of the water you found into the BB cups.
Re: Bottom Bracket Swimming...Alu Frame.
IME that amount of water is getting in somewhere else; frame breather holes or seatpost or unfilled braze-ons or unsealed rivnuts... there are plenty of possible places.
If you have an AHEAD stem it can get between the stem and the steerer, past the wedge piece, then pool between the head tube and the steerer, then run into the frame through the vent holes on the inside of the head tube. That could explain why it is rust-coloured water.
cheers
If you have an AHEAD stem it can get between the stem and the steerer, past the wedge piece, then pool between the head tube and the steerer, then run into the frame through the vent holes on the inside of the head tube. That could explain why it is rust-coloured water.
cheers
-------------------------------------------------------------------------------
~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~
- NATURAL ANKLING
- Posts: 13780
- Joined: 24 Oct 2012, 10:43pm
- Location: English Riviera
Re: Bottom Bracket Swimming...Alu Frame.
Hi,
This amount of water isnt getting past the threads in BB externaly, so it must be coming in from above, thought seat tube but not the headset.
Will have to check all that tomorrow, dont like leaks.
The Randonnuer seat pins so tight I dont get water in at all
But the skip trainer has a big slash in the tube and a sissy QR clamp (came with the bike, never liked QR's on any thing except wheel).
Thanks all.
Would'nt of thought of the head at all.....................
P.S. Has'nt rained for months but I did hose the bike in the week..........
This amount of water isnt getting past the threads in BB externaly, so it must be coming in from above, thought seat tube but not the headset.
Will have to check all that tomorrow, dont like leaks.
The Randonnuer seat pins so tight I dont get water in at all
But the skip trainer has a big slash in the tube and a sissy QR clamp (came with the bike, never liked QR's on any thing except wheel).
Thanks all.
Would'nt of thought of the head at all.....................
P.S. Has'nt rained for months but I did hose the bike in the week..........
NA Thinks Just End 2 End Return + Bivvy - Some day Soon I hope
You'll Still Find Me At The Top Of A Hill
Please forgive the poor Grammar I blame it on my mobile and phat thinkers.
You'll Still Find Me At The Top Of A Hill
Please forgive the poor Grammar I blame it on my mobile and phat thinkers.
Re: Bottom Bracket Swimming...Alu Frame.
Hi
The BB on my alu Spesh has a hole drilled through it (by Spesh) about where the water has pooled in yours
Regards
tim-b
The BB on my alu Spesh has a hole drilled through it (by Spesh) about where the water has pooled in yours
Regards
tim-b
~~~~¯\(ツ)/¯~~~~
Re: Bottom Bracket Swimming...Alu Frame.
Usually ingress is down the seat tube.
Simple solution is to stand the bike on the back wheel for a few moments after wet ride to drain the water out the chain stays.
Simple solution is to stand the bike on the back wheel for a few moments after wet ride to drain the water out the chain stays.
The theory is simple: a) cycling is inherently fun, and b) the less weight you carry, the more fun it is.
Tour Journals, Articles and Blog: Whispering Wheels
Tour Journals, Articles and Blog: Whispering Wheels
Re: Bottom Bracket Swimming...Alu Frame.
I think it is best if you can stop the water from getting in to start with, but this isn't always possible. To me, letting water in and then having a hole to drain it out again is more like damage limitation than a good plan.
If the water that gets into the frame in the wintertime is full of road salt, it can of course corrode the frame (Al or steel) from the inside out.
cheers
If the water that gets into the frame in the wintertime is full of road salt, it can of course corrode the frame (Al or steel) from the inside out.
cheers
Last edited by Brucey on 15 Oct 2014, 10:10am, edited 1 time in total.
-------------------------------------------------------------------------------
~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~
Re: Bottom Bracket Swimming...Alu Frame.
Solution is:-
insulating tape(or similar) at seatpost joint
Never use a hose (it will get into worse places as well)
Store bike in centrally heated accomodation!!
insulating tape(or similar) at seatpost joint
Never use a hose (it will get into worse places as well)
Store bike in centrally heated accomodation!!
Re: Bottom Bracket Swimming...Alu Frame.
The problem with storing the bike in heated areas is that when u take it out into the cold as the air inside the frame, and hubs for that matter, cools, it can suck in damp air.
Re: Bottom Bracket Swimming...Alu Frame.
....... but only if you have holes in the chainstays. My bike has no holes anywhere.RonK wrote:Simple solution is to stand the bike on the back wheel for a few moments after wet ride to drain the water out the chain stays.
Perhaps it's possible to get water in past the seatpost lug, but that's the only way in or out.
Mick F. Cornwall
- breakwellmz
- Posts: 1982
- Joined: 8 May 2012, 9:33pm
Re: Bottom Bracket Swimming...Alu Frame.
I was surprised to see how much water was in your BB shell, how did you manage to retain so much of it for the photo if you didn`t suspect it was in there,how did you take the BB out?
- NATURAL ANKLING
- Posts: 13780
- Joined: 24 Oct 2012, 10:43pm
- Location: English Riviera
Re: Bottom Bracket Swimming...Alu Frame.
Hi,
No fix honest.
I hosed the bike down day before / same day.
Mounted it on the bike stand upright.
Took out the BB and there it was a puddle.
Remember that the BB threaded portion has grease on the threads and the threads would be a barrier against the water migrating away.
If yopu remove BBthen the BB does not touch the unthreaded shell when you unscrew it, unless you want it too, lot of water though, normally just rusty BB.
The BB was acheapy so it had rusted too.
Still to locate the leak, but will find it.
There is also holes in the BB shell from every tube frame so possible it was sitting in there till I swayed the bike on to stand.
No fix honest.
I hosed the bike down day before / same day.
Mounted it on the bike stand upright.
Took out the BB and there it was a puddle.
Remember that the BB threaded portion has grease on the threads and the threads would be a barrier against the water migrating away.
If yopu remove BBthen the BB does not touch the unthreaded shell when you unscrew it, unless you want it too, lot of water though, normally just rusty BB.
The BB was acheapy so it had rusted too.
Still to locate the leak, but will find it.
There is also holes in the BB shell from every tube frame so possible it was sitting in there till I swayed the bike on to stand.
NA Thinks Just End 2 End Return + Bivvy - Some day Soon I hope
You'll Still Find Me At The Top Of A Hill
Please forgive the poor Grammar I blame it on my mobile and phat thinkers.
You'll Still Find Me At The Top Of A Hill
Please forgive the poor Grammar I blame it on my mobile and phat thinkers.