UCI expected to approve Road Disc Brakes for 2016

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Comedian
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Re: UCI expected to approve Road Disc Brakes for 2016

Postby Comedian » Fri Sep 22, 2017 4:45 pm

I hate being a troll/heretic. Luckily it seems I have some company... namely Jan Heine, Editor, Bicycle Quarterly.

https://janheine.wordpress.com/2011/10/03/science-and-bicycles-frame-stiffness/

The reduction of stress on the body is mostly due to other factors, like the tires (and pressure) and the fork design. Possibly, the seatstays can affect comfort as well, but the main frame is a fairly stiff structure for “vertical compliance.” I doubt a lighter-weight main triangle is going to affect that much. Obviously, if you are comfortable, not only can you put out more power, but you also enjoy cycling much more.

However, I find fascinating it that even if you can “tough it out” on a super-stiff frame and super-hard tires, you aren’t faster, because they simply are less efficient.


I believe this is the blog post that was the inspiration for this cycling tips podcast, where you can listen to Jan on frame stiffness. I don't can't recally him talking about forks specifically though but I might listen to it again. While it matches my experience - I'll understand if it's not a line of inquiry people might wish to explore.

https://cyclingtips.com/2017/06/cyclingtips-podcast-does-frame-stiffness-matter/

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silentC
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Re: UCI expected to approve Road Disc Brakes for 2016

Postby silentC » Fri Sep 22, 2017 5:04 pm

Can someone explain to me why we are trying to convince this guy he should adopt disc brakes?

Comedian, you don't need disc brakes. It's OK to say no :)
"If your next bike does not have disc brakes, the bike after that certainly will"
- Me

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Alex Simmons/RST
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Re: UCI expected to approve Road Disc Brakes for 2016

Postby Alex Simmons/RST » Fri Sep 22, 2017 5:07 pm

When blinded to the bike frame, riders are generable unable to pick a "stiff" frame from a "compliant" frame. I'd love to quickly provide the link to the experiment performed but CBA. It's come up before elsewhere.

Tyre pressure had a far greater impact on what sort of frame people thought they were riding.

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biker jk
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Re: UCI expected to approve Road Disc Brakes for 2016

Postby biker jk » Fri Sep 22, 2017 5:14 pm

silentC wrote:Can someone explain to me why we are trying to convince this guy he should adopt disc brakes?

Comedian, you don't need disc brakes. It's OK to say no :)


I don't believe anyone is trying to convince him to adopt disc brakes. It's more correcting the outrageous claims about weight, maintenance, ride quality, etc. of disc brake road bikes. After being shown to be wrong time and time again, I personally would keep a low profile but some can't avoid the rope-a-dope pummeling.

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silentC
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Re: UCI expected to approve Road Disc Brakes for 2016

Postby silentC » Fri Sep 22, 2017 5:30 pm

Sorry I got confused, he keeps telling us why he doesn't want/need them and I forgot what the argument was about :D
"If your next bike does not have disc brakes, the bike after that certainly will"
- Me

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silentC
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Re: UCI expected to approve Road Disc Brakes for 2016

Postby silentC » Fri Sep 22, 2017 5:45 pm

Alex Simmons/RST wrote:When blinded to the bike frame, riders are generable unable to pick a "stiff" frame from a "compliant" frame. I'd love to quickly provide the link to the experiment performed but CBA. It's come up before elsewhere.

Tyre pressure had a far greater impact on what sort of frame people thought they were riding.

I read a book about bike fit and the author had a theory that riders are 'micro' or 'macro' adjusters - meaning that some riders will notice - and complain about - very minor changes in set up whereas others don't notice until the changes become significant. I call it the 'princess and the pea' effect. So frame stiffness is probably similarly subjective. I know I do 95% of my riding on very harsh country road surfaces and I can say that a 10 PSI difference in tyre pressure in the front wheel is quite noticeable in terms of 'feeling the road'. Having ridden both disc and rim-braked carbon bikes I can't say that my disc bike is noticeably harsher.
"If your next bike does not have disc brakes, the bike after that certainly will"
- Me

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Alex Simmons/RST
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Re: UCI expected to approve Road Disc Brakes for 2016

Postby Alex Simmons/RST » Sat Sep 23, 2017 6:40 am

In any case, we're all a long way OT as this is supposed to be about disk brakes in UCI racing...

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MichaelB
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Re: UCI expected to approve Road Disc Brakes for 2016

Postby MichaelB » Mon Sep 25, 2017 8:43 am

Alex Simmons/RST wrote:In any case, we're all a long way OT as this is supposed to be about disk brakes in UCI racing...


SNAP !!!

And really agree re the 'blind' testing - 99% wouldn't tell the difference if we didn't actually know.


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