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From: Catrike Ryder <Soloman@old.bikers.org>
Newsgroups: rec.bicycles.tech
Subject: Re: New Bottom bracket
Date: Sat, 30 Mar 2024 19:01:15 -0400
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On Wed, 27 Mar 2024 08:14:33 -0400, Catrike Ryder
<Soloman@old.bikers.org> wrote:

>On Sat, 23 Mar 2024 18:58:04 -0400, Catrike Ryder
><Soloman@old.bikers.org> wrote:
>
>>On Sat, 23 Mar 2024 14:39:36 -0500, AMuzi <am@yellowjersey.org> wrote:
>>
>>>On 3/23/2024 1:41 PM, Catrike Ryder wrote:
>>>> On Fri, 22 Mar 2024 08:19:32 -0500, AMuzi <am@yellowjersey.org> wrote:
>>>> 
>>>>> On 3/22/2024 6:00 AM, Catrike Ryder wrote:
>>>>>> On Fri, 22 Mar 2024 06:47:38 -0400, Catrike Ryder
>>>>>> <Soloman@old.bikers.org> wrote:
>>>>>>
>>>>>>>
>>>>>>> I've been putting off the bottom bracket replacement for about a year
>>>>>>> now, but yesterday about 10 miles from my truck I shut off the music
>>>>>>> and heard clicking noises when I cranked.  Given that it has over
>>>>>>> 38000 miles on it, I ordered a new one. I feel a little flutter when I
>>>>>>> crank now when I make an effort to concentrate on it. Shame on me for
>>>>>>> putting off such a relatively cheap easy repair.
>>>>>>
>>>>>> Which makes me wonder: Has anyone ever heard of a total bottom bracket
>>>>>> bearing failure that rendered the bike unable to be pedaled?
>>>>>
>>>>> http://www.yellowjersey.org/photosfromthepast/spindlfz.jpg
>>>>> http://www.yellowjersey.org/photosfromthepast/spindlph.jpg
>>>>> http://www.yellowjersey.org/photosfromthepast/spinmalo.jpg
>>>>> http://www.yellowjersey.org/photosfromthepast/STBBRUST.JPG
>>>> 
>>>> I guess I'll wait for the new BB before I ride again.
>>>
>>>Those are not common failures, in fact the noise usually 
>>>drives people to distraction long before serious problems.
>>>
>>>So yes, small incidence. Just not zero.
>>
>>Actually, I was just rolling my eyes at the broken cranks you posted.
>>I didn't really think I'd get stranded, in fact, when I finally got
>>around to checking it, the crankset (Sram Truvita Elita) had just
>>loosened up a little. Had I taken a look after the ride I'd have
>>figured it out, but I'd done over 50 miles and was just happy to have
>>been able to get up off the Catrike and load it in the truck. I pulled
>>it apart today and the bearings look Ok. I'll probably ride a couple
>>times before the new BB gets here..  due on the 29th.
>
>I'm still going to change out the bottom bracket when the new one gets
>here, of course, but on my 50 mile ride yesterday, the old one with
>over 38,000 miles on it, had no problems. I will have to include a
>check for the crankset possibly loosening up on my preride checks. I
>have no idea how long it was loose. I wouldn't have noticed it had it
>not been the noise the it made when it wobbled back and forth with
>each pedal stroke.

Today, about halfway out, I started hearing and feeling the "tick"
again. It seemed to come and go randomly all along the 25 mile return
trip. The crankset is tight, and I can't find anything external making
any kind of contact. I happens with all three chainrings, so it's not
a loose chainring. It occurs when the chainring side is at the
deraileur location, but it only happens when rotating as in a power
stroke. I haven't had a chance to change out the bottom bracket yet,
so I'm curious as to what I'm going to see when I get it apart.