Path: ...!news.mixmin.net!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: AMuzi <am@yellowjersey.org>
Newsgroups: rec.bicycles.tech
Subject: Re: Extensive article on Rivendell and Grant Petersen
Date: Thu, 26 Sep 2024 14:39:03 -0500
Organization: Yellow Jersey, Ltd.
Lines: 41
Message-ID: <vd4d8m$bkc2$1@dont-email.me>
References: <vcn277$1minb$1@dont-email.me> <IbWHO.21156$MxR.18519@fx47.iad>
 <vcpiki$29eeg$1@dont-email.me> <vcpu65$2ausd$2@dont-email.me>
 <vcqif4$2hoq2$1@dont-email.me> <VEfIO.1095856$azJ4.449168@fx16.ams4>
 <vcsa02$2q622$1@dont-email.me> <eid5fjluv7j6qmp87vmnv99vpcts2lfe5m@4ax.com>
 <vcujsc$37v5r$2@dont-email.me> <0ue8fj5a6brvfb6bv8pl0f90peuor4tfiv@4ax.com>
 <vd215l$3q9f4$1@dont-email.me> <vd2ht1$1eb5$2@dont-email.me>
 <TebJO.4744$jVLc.3800@fx15.ams4> <vd48o9$anap$4@dont-email.me>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Injection-Date: Thu, 26 Sep 2024 21:39:02 +0200 (CEST)
Injection-Info: dont-email.me; posting-host="7ee4d816db0df12b5e069c524676db8f";
	logging-data="381314"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX19DKunHXNOqJSvLDz2YVKXo"
User-Agent: Mozilla Thunderbird
Cancel-Lock: sha1:7t/Ga8yrWsM2XVImzxCbb91kfI0=
Content-Language: en-US
In-Reply-To: <vd48o9$anap$4@dont-email.me>
Bytes: 3003

On 9/26/2024 1:22 PM, Frank Krygowski wrote:
> On 9/26/2024 7:06 AM, Roger Merriman wrote:
>>
>> Hydraulic system being in someways simpler ie only 
>> mechanical moving parts
>> are the pistons and the levers and sealed from grot so 
>> will work even if
>> completely clogged up.
> 
> I thought the pad retraction depended on the proper flexing 
> of a rubber ring or seal; and I thought I came across a 
> video detailing the need for cleaning that stuff inside the 
> caliper to maintain proper retraction. Am I remembering 
> wrong? ISTM that without some such mechanism, removing 
> hydraulic pressure would still leave the pads lightly 
> scuffing the disc.
> 
>> Extremely easy to live with change pads every so often, 
>> for my uses less
>> often than rim pads which just get eaten by the slop. 
> 
> Your use must be unusual. My rim brake shoes seem to last 
> decades. And I've mentioned the Warm Showers guest whose 
> disc pads surprised hiim by wearing out on a hilly northern 
> Pennsylvania tour.
> 
> At least with rim brakes, shoe wear is easily visible.
> 

The systems are just different. Disc pads are readily 
observed in place for wear depth and change easily without 
disturbing any adjustments.  Damaged piston seals are 
possible yes, but in practice uncommon. The system is 
heavier but allows more tire/mudguard clearance AEBE. 
Different, but neither is compelling IMHO.  Both systems 
work well for many riders.

-- 
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971