Tour de France Tour de France 2023, stage 16: Passy - Combloux, 22.4k (ITT)

[Krzysztof_O]

I'm really curious about the bike calculations. Riders who stay on their TT bikes will benefit from decreased wind resistance even on the hill, but riders who change to their road bike will benefit from a lighter weight bike. Which saves more time?

On a 6-minute steep climb, assuming road bike is 2 kilo lighter, one could gain around a dozen or so seconds (so not much more than a time loss due to a bike change). This is a simplified assumption cause:
1) Gravity isn't the only resistive force to overcome - on a steep climb it's a large majority but not all (the remaining force will be smaller with a TT bike)
2) Power output may vary on TT bike (vs road bike) with possible advantage of the latter.
Those two factors have opposite influence which makes things more difficult plus there's a shallower section also (which alone can actually make very little difference due to moderate gradient ).

 

[Unterlenkerfahrend]

Commentators getting excited about Cavangas time, don't think that was anything special.

 

[Danskebjerge]

Mattias Reck, trainer Trek-Lidl, said that Mads wanted to go hard after the rest day to "wake up" the body.

Okay, but there is a possible stage win tomorrow.

 

[RobertCrawley]

On a 6-minute steep climb, assuming road bike is 2 kilo lighter, one could gain around a dozen or so seconds (so similar to a possible time loss due to a bike change). This is a simplified assumption cause:
1) Gravity isn't the only resistive force to overcome - on a steep climb it's a large majority but not all (the other forces will be smaller with a TT bike)
2) Power output may vary on TT bike (vs road bike) with possible advantage of the latter.
Those two factors have opposite influence which makes things more difficult plus there's a shallower section also (which alone can actually make no net difference).

They are rolling at 26mph/41.8kph up the hill. Yes, lots of factors.

 

[RedheadDane]

Okay, but there is a possible stage win tomorrow.

Not for Pedersen!

 

[Boehmand]

Okay, but there is a possible stage win tomorrow.

It will be the biggest sensation in cycling in 29 years, if Mads P wins tomorrow

 

[Eddy Evenepoel]

Okay, but there is a possible stage win tomorrow.

Climber Mads flying over Loze.

 

[QueenStagiaire]

Not for Pedersen!

Kasper Asgreen will leave him without a chance.

 

[RedheadDane]

Kasper Asgreen will leave him without a chance.

I don't think Asgreen is gonna win tomorrow either...

 

[Danskebjerge]

It will be the biggest sensation in cycling in 29 years, if Mads P wins tomorrow

Yeah - I did the old "looking at the date instead of the stage number" error.

 

[Bavarianrider]

Crazy average already. The peleton is juiced like it has never been before.

 

[Boehmand]

Crazy average already. The peleton is juiced like it has never been before.

If I was you, I'd stop watching

- and commenting.

 

[glassmoon]

Pushing IS allowed, because on a TT bike you are riding such big gears, that it is very difficult to get going without a little "start help". It's the same reason TT's always start on a ramp.

Removing the possibility would maximise the effects of technical issues, like a crash, flat or a lost chain.

you have small enough gear on TT bike to be able to start with 0 problems - they don't have it shifted to purely because the push is allowed

but let's agree to disagree about the pushing and leave it already... don't wanna spam the thread with this any more. nor it is necessary.

 

[Boehmand]

Pedersen saying he didn't ride at all yesterday, so he wanted to ride full today to get the legs working again.

 

[saunaking]

I'm really curious about the bike calculations. Riders who stay on their TT bikes will benefit from decreased wind resistance even on the hill, but riders who change to their road bike will benefit from a lighter weight bike. Which saves more time?

surely these guys have done real world tests where they ride up a 5% or so climb for 5k at 400w or whatever and see their actual PERSONAL time difference.
I dont think you can generalize too much - riders who dont concentrate on their TT setup will probably always be better off on a road bike and TT specialists may have very narrow margins

 

[Boehmand]

they don't have it shifted to purely because the push is allowed

I have no idea what this means?

 

[Pippo_San]

1kg is gonna be like 7W at most while even at 25kph youre gonna have in excess of 50W of wind resistance

It was implied the difference in wind resistance using a TT bike.

 

[Red Rick]

O/U winning time at 34 minutes?

Taking the under on that one

 

[pelotonIQ]

Pogi is a kid, Vinge is the father of a kid. Big difference in outlook. You can see that in his response to the attack in Annecy during the Dauphine

I dont know what brought you to their private life. I was obviously refering to their cycling.

 

[Krzysztof_O]

There's even more history on the line. As we all know our eternal youngster Teddy is going for the 4th consecutive young rider classification victory. Him racing and winning stages in the white jersey is a constant element of the Tour. And this stage may actually be the last one when he wears it - enjoy it while it lasts!

 

[Didinho]

Did Ineos already practice their helmet change today?

 

[Bavarianrider]

If I was you, I'd stop watching

- and commenting.

If you were me you`d be a smart and handsome man.

 

[Trofonios]

Cavanga 23.2 kph last 6.3k. Climb is tough.

 

[Netserk]

If Cavagna's time loss to the winner is proportional to that in the 2020 TT, he will finish about 1:10-1:15 down, which would be about 34:30 as the winning time, so a 39 km/h-ish average speed.

If Cavagna was as good today as he was back then, I think the gap to Pedersen would’ve been greater.

 

[glassmoon]

I have no idea what this means?

they don't have the small enough gear selected on the spare bike because they know the push is allowed anyway - there is absolutely no reason for push to be necessary because of big gears on TT bike as you stated. plenty of range on the TT bike too.