2020 Pro thread

Questions about bike hire abroad and everything light bike related. No off-topic chat please

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pdlpsher1
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by pdlpsher1

When I descented Mt. Evans and Pikes Peak it was quite scary. I dropped down like a rock in vacuum!

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Pierre86
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by Pierre86

TobinHatesYou wrote:
Mon May 18, 2020 5:24 am
Pierre86 wrote:
Mon May 18, 2020 4:06 am

You also make less power for the same effort on the climbs too which would outweigh any gains on the downhill

Reduced aero drag, combined uphill and downhill is more significant than the effective O2 drop. There’s a reason why the hour records are set at altitude. It’s assumed the ideal elevation is around 3000m!
Well versed on altitude for track cycling but the speeds involved are vastly different than climbing an 11% grade where air resistence is not the largest force acting on the rider, especially not at 12k an hour. The o2 reduction going up likely offsets the reduced drag time saving going down.
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by Weenie


sychen
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by sychen

LeDuke wrote:
sychen wrote:
pdlpsher1 wrote:Swenson's chosen climb is much longer than Gaimon's. The longer distance meant he was able to descent at over 40mph average speed for nearly two miles, and make fewer U-turns at the top and bottom. Swenson was climbing at the same VAM as Gaimon but he won the challenge on the descent. Swenson's climb is at high altitude compared to Gaimon's which was at sea level. At higher altitude you descend faster due to lower air density. Sometimes it takes a bit of 'brain' to break a record. Kudos to Swenson.
This is also a product of their physiology and training.. Phil is a short climb specialist, so went for something that suits him and close by due to pandemic.

Swenson is a offroader.. Tends to specialise in long sustained efforts and will suit a long climb better.
There will be arguments whether oxygen level vs descent speed at altitude.. Would his vam be higher at sea level? Also this climb is near his place of residence .. So doubt it is due to special planning or superior intelligence!

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Keegan Swenson’s chosen profession, WC XCO racing, has no climbs longer than 5 minutes at any current venue. Most are half that or less.

So, I’m not sure why you’d say that he specializes in longer climbs.


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For some reason I thought he does gravel races.. My bad.

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pdlpsher1
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by pdlpsher1

Pierre86 wrote:
TobinHatesYou wrote:
Mon May 18, 2020 5:24 am
Pierre86 wrote:
Mon May 18, 2020 4:06 am

You also make less power for the same effort on the climbs too which would outweigh any gains on the downhill

Reduced aero drag, combined uphill and downhill is more significant than the effective O2 drop. There’s a reason why the hour records are set at altitude. It’s assumed the ideal elevation is around 3000m!
Well versed on altitude for track cycling but the speeds involved are vastly different than climbing an 11% grade where air resistence is not the largest force acting on the rider, especially not at 12k an hour. The o2 reduction going up likely offsets the reduced drag time saving going down.
So you are suggesting that Swenson could do even better at sea level? How much more time you think he can shave off with more O2 at sea level?

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pastronef
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by pastronef

Swannie wrote:
Mon May 18, 2020 5:40 am
Jumbo Visma to quit riding Bianchi, next year they'll be on Cervélo?
any more details on them quitting Bianchi? thanks

Swannie
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by Swannie

details i don't have, just heard it yesterday from someone inside the team. Think their contract just ends.

pastronef
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by pastronef

Swannie wrote:
Mon May 18, 2020 11:27 am
details i don't have, just heard it yesterday from someone inside the team. Think their contract just ends.
thanks. and Bianchi won´t re-up?

ooo
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by ooo

Is it effective from 1.1.2021 or ealier date? Is it sram or shimano?
'

blaugrana
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by blaugrana

TobinHatesYou wrote:
Mon May 18, 2020 5:24 am
Reduced aero drag, combined uphill and downhill is more significant than the effective O2 drop. There’s a reason why the hour records are set at altitude. It’s assumed the ideal elevation is around 3000m!
I don't think it's that simple. For the hour record aero drag is a lot more signifficant than when climbing, especially considering that to maximize VAM (the key metric for an everesting record) you want to ride on a quite steep grade (where aero matters less). The only source I could find where the effect that elevation has directly on VAM (so taking into account the reduced VO2max but also the reduced drag) is discussed is from Michelle Ferrari, but despite his shady past, the estimation is probably still reasonably accurate: https://www.53x12.com/vam-effects-of-gradient
He estimates that VAM is reduced by 3% for every 500m of elevation, and I guess that even if these numbers are a bit off, the main idea that VAM is higher at lower elevation still stands.

And even if you make a bit of that back on the descent, I doubt it's enough to compensate the loss on the climb, as there are many factors that affect descending speeds other than just drag and/or terminal velocity.

Karvalo
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by Karvalo

blaugrana wrote:
Tue May 19, 2020 11:13 am
He estimates that VAM is reduced by 3% for every 500m of elevation, and I guess that even if these numbers are a bit off, the main idea that VAM is higher at lower elevation still stands.

And even if you make a bit of that back on the descent, I doubt it's enough to compensate the loss on the climb, as there are many factors that affect descending speeds other than just drag and/or terminal velocity.
Yep. And since you spend far more time climbing than descending you would need to be going much more than 3% faster on the downhill to make back the difference on average speed.

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LouisN
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by LouisN

While world class pros are "asleep", random athletes are taking over a tiny part of the internet with different "exploits"....

Suggestion: Maybe time to start another thread IMO. Talk cyclist's exploits and numbers. There would be the place to post that guy (or gal)'s KOM, longest, highest, fastest anything, and discuss...

Louis :)

Pierre86
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by Pierre86

LouisN wrote:
Tue May 19, 2020 1:36 pm
While world class pros are "asleep", random athletes are taking over a tiny part of the internet with different "exploits"....
How many random athletes have a UCI ranking?
http://mtbcrosscountry.com/riders/keegan-swenson/
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LeDuke
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by LeDuke

Pierre86 wrote:
LouisN wrote:
Tue May 19, 2020 1:36 pm
While world class pros are "asleep", random athletes are taking over a tiny part of the internet with different "exploits"....
How many random athletes have a UCI ranking?
http://mtbcrosscountry.com/riders/keegan-swenson/
Yeah. He’s a top 25-30 XCO WC guy most days. He’ll also likely be an Olympian.

I’m not sure about you, but I think that’s “World Class”.


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LouisN
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by LouisN

Sorry guys. Doesn't fit my definition. Duke you forgot the only important word included in the thread: Pro.
We also have a local here (Zwift) Everesting these days for local charity, also a top 50 Mtb UCI list, also an Olympian.
I just wouldn't be writing about his exploits on here, I'd start another thread about it.
Aren't you suppose to "defend" PG's curriculum too ? :lol:

Louis :)

by Weenie


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LeDuke
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by LeDuke

LouisN wrote:Sorry guys. Doesn't fit my definition. Duke you forgot the only important word included in the thread: Pro.
We also have a local here (Zwift) Everesting these days for local charity, also a top 50 Mtb UCI list, also an Olympian.
I just wouldn't be writing about his exploits on here, I'd start another thread about it.
Aren't you suppose to "defend" PG's curriculum too ? :lol:

Louis :)
He (Keegan Swenson) is a professional cyclist.

Are you arguing that he is not?

Are WC XCO racers not pros? What about CX racers? Or, non-WT road pros? Is MvdP not a “pro”, then?


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