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Re: New 2019 Cervelo P5 Disc Brake [damon.lebeouf] [ In reply to ]
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damon.lebeouf wrote:
you're one of those lazy people that expect to be spoon fed everything huh?

and no numbers have been posted.


No, Iam a human and I ask for help and I help if I can!
Is it really so hard for you that someone ask a question that’s almost answered?
What’s wrong with you? American? Why so aggressive? Have a good time!
Last edited by: HappyWeirdo: Apr 14, 19 14:17
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Re: New 2019 Cervelo P5 Disc Brake [HappyWeirdo] [ In reply to ]
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HappyWeirdo wrote:
Which one is more Aero? P3x or P5D and how much?

We don't have any direct comparison data and we're really getting down to splitting hairs between these bikes. So there is no definitive answer without taking one of each and setting them up the way you would race then testing.

The table below shows a 5hr rider at IMNZ across the last 8 editions of the race. Time difference shown in seconds. A negative number means that the 2nd bike is faster.


The comparisons are all based on Cervelo data, except for the last column which is from Tour Magazin.
Light and Heavy refer to nutrition configuration.

So if we were to try to draw conclusions:
P5D slightly slower than the P5, depending on conditions
P3X definitely slower than P5X when fully loaded, pretty close if you strip it down
P5X faster than P5 if carrying the Kitchen sink
P5 much faster than P5X if running it clean (note that the Tour testing uses pedalling legs with no torso, compared to Cervelo using a static full mannequin)

For interest, P3X light vs P5X Heavy


Showing once again that carrying less stuff is 2-3mins faster and you can't buy your way out of that problem.

As mentioned - no definitive answer to your question. It seems likely that in the stripped down scenario the P5D would have an advantage over the P3X but that would narrow considerably once you're carrying stuff.


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Re: New 2019 Cervelo P5 Disc Brake [cyclenutnz] [ In reply to ]
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Interesting. Could you just clarify what the "light" and "heavy" configurations are?
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Re: New 2019 Cervelo P5 Disc Brake [SAvan] [ In reply to ]
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SAvan wrote:
Interesting. Could you just clarify what the "light" and "heavy" configurations are?

That wasn't clear. Aerogeeks said that light might have been one bottle and heavy more bottles (so I added 1.5kg in the modelling)
For P5X vs P5 heavy was the overloaded config they had observed at IM races. Light was Tour mag testing with no bottles or storage


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Re: New 2019 Cervelo P5 Disc Brake [cyclenutnz] [ In reply to ]
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Apologies if I missed it earlier but why should the P3x 'heavy' differ from the P5x 'heavy'? I thought they had the same bottle mounting options and obviously everything else is internally stored? I'd be staggered if there was that much difference between the frames in frame to bottle interaction...!

Also do the numbers imply that some years a fully laden P5 would actually be faster than a fully laden P3x or am I misinterpreting?
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Re: New 2019 Cervelo P5 Disc Brake [Polo_1272] [ In reply to ]
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Polo_1272 wrote:
Apologies if I missed it earlier but why should the P3x 'heavy' differ from the P5x 'heavy'? I thought they had the same bottle mounting options and obviously everything else is internally stored? I'd be staggered if there was that much difference between the frames in frame to bottle interaction...!

Hard to know without knowing exactly what heavy means. Maybe an extra external bag was added to the P3X to give equivalent carrying to the downtube storage on the P5X.

Quote:
Also do the numbers imply that some years a fully laden P5 would actually be faster than a fully laden P3x or am I misinterpreting?

It looks like it would be pretty marginal between P5 loaded down and a P3X. But that would be a silly way to use a P5 - definitely get a P3X if you want to do that. Otherwise strip down the P5 and have a faster bike. We can't say anything definite based on looking at separate tests side by side, but there is a strong implication that optimised setups for each disc bike are all very close to each other.


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Re: New 2019 Cervelo P5 Disc Brake [cyclenutnz] [ In reply to ]
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cyclenutnz wrote:
But that would be a silly way to use a P5 - definitely get a P3X if you want to do that.

Completely agree, just curious about the hypothetical situation! Thanks for clarifying, it's certainly interesting that it's all so marginal.
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Re: New 2019 Cervelo P5 Disc Brake [cyclenutnz] [ In reply to ]
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cyclenutnz wrote:
HappyWeirdo wrote:
Which one is more Aero? P3x or P5D and how much?

We don't have any direct comparison data and we're really getting down to splitting hairs between these bikes. So there is no definitive answer without taking one of each and setting them up the way you would race then testing.

The table below shows a 5hr rider at IMNZ across the last 8 editions of the race. Time difference shown in seconds. A negative number means that the 2nd bike is faster.


The comparisons are all based on Cervelo data, except for the last column which is from Tour Magazin.
Light and Heavy refer to nutrition configuration.

So if we were to try to draw conclusions:
P5D slightly slower than the P5, depending on conditions
P3X definitely slower than P5X when fully loaded, pretty close if you strip it down
P5X faster than P5 if carrying the Kitchen sink
P5 much faster than P5X if running it clean (note that the Tour testing uses pedalling legs with no torso, compared to Cervelo using a static full mannequin)

For interest, P3X light vs P5X Heavy


Showing once again that carrying less stuff is 2-3mins faster and you can't buy your way out of that problem.

As mentioned - no definitive answer to your question. It seems likely that in the stripped down scenario the P5D would have an advantage over the P3X but that would narrow considerably once you're carrying stuff.

That’s Great! Thanks!
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