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From: Frank Krygowski <frkrygow@sbcglobal.net>
Newsgroups: rec.bicycles.tech
Subject: Re: Bleeding Disc's
Date: Fri, 21 Mar 2025 17:59:49 -0400
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On 3/21/2025 5:17 PM, Roger Merriman wrote:
> Frank Krygowski <frkrygow@sbcglobal.net> wrote:
>> On 3/20/2025 4:44 PM, Mark J cleary wrote:
>>> On 3/20/2025 2:46 PM, cyclintom wrote:
>>>> I can't say what's going on. The fact that you had to bleed the rear
>>>> brakes backwards but I cured the front brakes which you would think
>>>> wouldn't be a problem since it is all vertical hoses was amazing.
>>>> Bleeding that brake from top to bottom releases a lot of air bubbles
>>>> after which the disk levers were hard and with about a half way pull
>>>> to lock.
>>>>
>>>> The levers with the bleeding cap off appeared top be full of liquid so
>>>> the levers were full and it couldn't be air trapped somewhere in the
>>>> levers.
>>>>
>>>>
>>>> but installing a funnel and filling it half way and using the syring
>>>> on the bottom pulled a great deal of air out of the system.
>>>>
>>>> So while the Shimano instructions and most of the videos showed bottom
>>>> to top, bleeding trom top to bottom as one video, made by a woman
>>>> mechanic seems to be the only way to get the brake properly bled.
>>>
>>> I have done it both ways and all seem to work about the same. However
>>> getting in a hurry and not letting things settle is a problem. This
>>> youtube video I watched is great and this works great.
>>>
>>> https://www.youtube.com/watch?v=brLF56banjs
>>
>> SO much more finicky than dealing with cable actuated rim brakes!
>>
> This is a Tom thing! 

Misreading what I wrote is a Tom thing!

> Cable disks have niche applications, much like
> hydraulic rim brakes, both of which aren’t obsolete but are technological
> dead ends, with the same products being sold.
> 
> Cable disks as they aren’t a sealed system, get muck into the callipers,
> which absolutely will do a number on the calliper, my Gravel bike as new
> had cable disks, used a few different callipers before I upgraded to
> hydraulic.
> 
> They require much more maintenance, aka adjusting as the pads wear down,
> aren’t as powerful as hydraulics and realistically are rather the worse of
> both worlds.

Except I was talking about cable actuated rim brakes, not cable disks.

> Assuming the bike has the clearance for 32ish then rim brakes arguably are
> easier to live with as long as it’s a road bike, rim pads have a remarkably
> short lifespan on wet mucky rides! Let alone lack of power and so on.
Agreed. Like the vast majority of cyclists, almost all my miles are on 
pavement. I don't do many miles on wet mucky rides.

-- 
- Frank Krygowski