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OK old fart thought.
Last Post 04/17/2021 05:43 PM by 79 pmooney. 10 Replies.
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mondonico

Posts:158

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04/13/2021 08:39 PM
Just listing to old RR from the 70's on YouTube Grand Funk Railroad. Shea stadium. At 32 seconds they show a sting ray type of bike with disc brakes. I did not know they had them forty years ago. Have never seen such a thing.
Orange Crush

Posts:4499

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04/13/2021 09:08 PM
Google is your friend...

1972 Schwinn Stingray Orange Krate Disc Brake Show Bike

Apparently a very narrow time window when these bikes were made
https://thecabe.com/forum/threads/when-was-disc-brake-put-on-krate.82996/
79pmooney

Posts:3178

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04/13/2021 11:04 PM
So ... Disc brakes are old technology. Glad I've got modern dual pivot brake on two bikes.
6ix

Posts:485

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04/14/2021 08:03 AM
The bigger the disc rotor, the better the performance, right?

Well, I got some big honkin' 27" rotors right here!!

I sure hope the next generation of disc brakes feature a way to open the pads up a bit when the inevitable rub or 'ting ting ting' starts. Even with thru axle, I still find myself having to adjust the caliper bolts a bit often. Why can't the pad throw be longer?
huckleberry

Posts:824

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04/14/2021 09:07 AM
That was my first bike! Still gives me goosebumps thinking of it. I was 8.
79pmooney

Posts:3178

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04/14/2021 10:41 AM

Posted By Evan Solida on 04/14/2021 08:03 AM
The bigger the disc rotor, the better the performance, right?

Well, I got some big honkin' 27" rotors right here!!

I sure hope the next generation of disc brakes feature a way to open the pads up a bit when the inevitable rub or 'ting ting ting' starts. Even with thru axle, I still find myself having to adjust the caliper bolts a bit often. Why can't the pad throw be longer?

Didn't they move the calipers up higher on the fork to reduce bending moment and allow for a lighter fork also? I seem to recall reading that somewhere. Pretty radical thinking if that's right.
6ix

Posts:485

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04/14/2021 12:53 PM
Interesting thought to move the calipers further away from the hub/axle. Wouldn't that increase leverage? What if you moved the caliper all the way to the very outside of the rim?
Dale

Posts:1767

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04/17/2021 05:05 PM
Whoa! What if you incorporated the disc as part of the actual wheel structure rather than a separate, bolt-on piece?

Somebody call the patent office, I've got an idea!
Orange Crush

Posts:4499

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04/17/2021 05:27 PM
Dinking around the margin.

There’s EM propulsion wheels which means you should also be able to engineer EM braking.
79pmooney

Posts:3178

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04/17/2021 05:38 PM
Dale, I'm not quite sure what this would look like but it seems to me with the caliper working at that big a radius, you could use a lighter, simpler system and operate it cables somehow. I'll sleep on this one.
79pmooney

Posts:3178

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04/17/2021 05:43 PM

Posted By Orange Crush on 04/17/2021 05:27 PM
Dinking around the margin.

There’s EM propulsion wheels which means you should also be able to engineer EM braking.

Get the efficiencies up and you should be able to get up about 60% up the next hill before you have to pedal. (Run the rear fixed and have the freewheel up front.)
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