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From: Zen Cycle <funkmaster@hotmail.com>
Newsgroups: rec.bicycles.tech
Subject: Re: Disc Compatibility?
Date: Fri, 7 Mar 2025 11:46:55 -0500
Organization: A noiseless patient Spider
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On 3/7/2025 11:36 AM, AMuzi wrote:
> On 3/7/2025 9:59 AM, Zen Cycle wrote:
>> On 3/7/2025 10:53 AM, cyclintom wrote:
>>> On Thu Mar 6 11:23:43 2025 AMuzi  wrote:
>>>> On 3/6/2025 10:53 AM, cyclintom wrote:
>>>>> On Thu Mar 6 12:46:35 2025 Roger Merriman  wrote:
>>>>>> zen cycle <funkmasterxx@hotmail.com> wrote:
>>>>>>>> On 3/5/2025 2:17 PM, cyclintom wrote:
>>>>>>>>> On Tue Mar 4 21:55:28 2025 Roger Merriman wrote:
>>>>>>>>>> cyclintom <cyclintom@yahoo.com> wrote:
>>>>>>>>>>> Andrew, I have GRX levers and Ultegra actuators. It acts as if
>>>>>>>>>>> these are
>>>>>>>>>>> not compatible. The levers on both front and rear will not 
>>>>>>>>>>> "pump" the
>>>>>>>>>>> brake pades close enough to the discs so that they actuate with
>>>>>>>>>>> almost no
>>>>>>>>>>> pull. Instead they pull almost all of the way to the bar.
>>>>>>>>>>>
>>>>>>>>>>> The pads are hardly worn and there are no leaks from the 
>>>>>>>>>>> connections.
>>>>>>>>>>>
>>>>>>>>>> Should be, uses same pads/hose fitting kit and so on, and 
>>>>>>>>>> appears to be
>>>>>>>>>> same calipers broadly from Tiagra to Dura Ace, though Cues is 
>>>>>>>>>> I believe
>>>>>>>>>> doing its own thing! Aka less performance more simple design.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> What I was trying to discover was if the 10 speed GRX levers 
>>>>>>>>> didn't
>>>>>>>>> have the capacity of the 11 speed Ultegra actuators. That 
>>>>>>>>> occurred to
>>>>>>>>> me in a dream.
>>>>>>>
>>>>>>> Which is where tommy gets most of his silly ideas - dents popping 
>>>>>>> out of
>>>>>>> top tubes, for example
>>>>>>>
>>>>>>>> But since they are compatible it must be air in the
>>>>>>>>> system. The thing that bothers me is that all of my previous disk
>>>>>>>>> bikes had hard front and back brakes. This setup has the same 
>>>>>>>>> pull on
>>>>>>>>> front and back and the front is a straight shot up and bled 
>>>>>>>>> without a
>>>>>>>>> problem.
>>>>>>>>
>>>>>>>> Because the rear caliper line entry is at an unusual angle. The 
>>>>>>>> front
>>>>>>>> points straight up.
>>>>>>>>
>>>>>>>> Need to remove the rear caliper form the frame so it can be at the
>>>>>>>> lowest point in the system, line pointing up. Rap the caliper 
>>>>>>>> with a
>>>>>>>> tool handle while purging the fluid. It has air in the nooks and
>>>>>>>> crannies of the caliper.
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> It is though very similar to way folks with a brain injury work or 
>>>>>> rather
>>>>>> don?t I guess, aka confabulation, hence his doubling down as he 
>>>>>> believes
>>>>>> it.
>>>>>>
>>>>>> With apologies for Facebook link!
>>>>>>
>>>>>> <https://m.facebook.com/story.php? 
>>>>>> story_fbid=10154178800268586&id=13533633585>
>>>>>>
>>>>>> I totally believed it at the time, was some 6 months post brain 
>>>>>> injury and
>>>>>> my wife couldn?t get me to understand that it was a joke, took me 
>>>>>> a day or
>>>>>> so to figure it out!
>>>>>>
>>>>>> I?m still unable to accurately parse, more complicated folks 
>>>>>> intent has
>>>>>> made me rather literal, and wife missed my ability to get jokes 
>>>>>> and so on.
>>>>>>
>>>>>> I occasionally ride around there, though it?s spectacularly muddy at
>>>>>> moment, though is bright and sunny now, I was up on the on the 
>>>>>> (which is
>>>>>> old road that runs though Avebury) Ridgeway on Tuesday, glorious 
>>>>>> day, did
>>>>>> nearly eat a hedge on the decent down to Egypt! As even the Magic 
>>>>>> Mary?s
>>>>>> packed up with mud! I do enjoy the various lumps and bumps in the 
>>>>>> area ie
>>>>>> henges and other things!
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> Roger, what is doubling down? I had a dent in the top tube and it 
>>>>> went away. I showed you the SCIENCE of how that could happen and 
>>>>> you believe it to be fake science? Frank is NOT a mechanical 
>>>>> engineer and Liebermann isn't even an engineer of any sort. Flunky 
>>>>> is on this newsgroup at least 100% during what would be working 
>>>>> hours and he has showed us his account where he said that he rode 
>>>>> TWO 200 mile rides wityh climbing in them at around 20 mph rides. 
>>>>> If you believe ANY of these guys you have to ask yourself why.
>>>>>
>>>>> My brain injury caused seizures and not as you seem to conceive - 
>>>>> the inability to think. The seizure stopped the ability to post and 
>>>>> that was treated successfully with medication. So the question 
>>>>> arises, what has happened to your ability to think?
>>>>
>>>> You think that there was a dent which just disappeared.
>>>>
>>>> That did not happen. Or a metaphysical event interceded with
>>>> the otherwise solid laws of physics.
>>>
>>>
>>>
>>>
>>> If you leaned against the door of your truck and it bent inwards, so 
>>> you pulled the liner off and pushed it back out with a "clang!" would 
>>> you be talking impossible metaphysical events or that you were just 
>>> imagining it?
>>
>> That's not a high-carbon steel tube, dumbass.
>>
>>
> 
> True, but the principles are the same across steels as a group.  The 
> relative numbers vary from one steel alloy or temper finish to another.
> 

Except that the characteristics of a tube versus a sheet of the same 
material thickness are more than a little different. The form of the 
metal is of critical consideration.
-- 
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