Path: ...!news.nobody.at!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: AMuzi Newsgroups: rec.bicycles.tech Subject: Re: New Bottom bracket Date: Sun, 31 Mar 2024 09:36:22 -0500 Organization: Yellow Jersey, Ltd. Lines: 80 Message-ID: References: <8gnqvilkpvvf30rlkmnq8pgkau6qvu1fus@4ax.com> <22pqvi941vpt2c51o4t4lcapghc0t194q2@4ax.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Sun, 31 Mar 2024 14:36:22 +0200 (CEST) Injection-Info: dont-email.me; posting-host="07ad3c2af8b11f2ac4cc3b53b8d9bc95"; logging-data="1943480"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19l5FAE9WXTVUjB2q+drpNq" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:/9wwxlNwpL9aKhgFghv6Pzo8wR0= In-Reply-To: Content-Language: en-US Bytes: 5149 On 3/30/2024 6:01 PM, Catrike Ryder wrote: > On Wed, 27 Mar 2024 08:14:33 -0400, Catrike Ryder > wrote: > >> On Sat, 23 Mar 2024 18:58:04 -0400, Catrike Ryder >> wrote: >> >>> On Sat, 23 Mar 2024 14:39:36 -0500, AMuzi wrote: >>> >>>> On 3/23/2024 1:41 PM, Catrike Ryder wrote: >>>>> On Fri, 22 Mar 2024 08:19:32 -0500, AMuzi wrote: >>>>> >>>>>> On 3/22/2024 6:00 AM, Catrike Ryder wrote: >>>>>>> On Fri, 22 Mar 2024 06:47:38 -0400, Catrike Ryder >>>>>>> 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. Could be a bearing problem (and I understand you ordered a replacement already. Could be a cup loose in the frame. On square cranks, a loose bolt/arm makes noise (much less likely on a spline crank). I think you said you ensured pedals are tight in the arms, yes? You seem to have eliminated chainring bolts and a front gear wire hitting the arm so that about covers 'crank rotation noises'. -- Andrew Muzi am@yellowjersey.org Open every day since 1 April, 1971