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Conti GP4000 700x20 Vs Vittoria Open Corsa Evo CX 700x20

 

   


Cake

Feb 11, 12 16:30

Post #1 of 15 (4055 views)
Conti GP4000 700x20 Vs Vittoria Open Corsa Evo CX 700x20 Quote | Reply

Hi guys,

Its come down to a choice between these 2.

Going to put them on a SRAM S80 which is a pretty narrow wheel.

Has anybody found either of these 2 tired to be bad?


I'll be riding them for training and racing Oly to Ironman. So I do want some puncture resistance too built into the tires.

I don't see a 700x20 in the GP4000s (Black Chilli) will be using that tire in 700x23 in my rear Hed disc.

Many Thanks for your feedback.

-Cake


(This post was edited by Cake on Feb 11, 12 16:31)


Dopers.Suck

Feb 11, 12 16:53

Post #2 of 15 (4034 views)
Re: Conti GP4000 700x20 Vs Vittoria Open Corsa Evo CX 700x20 [Cake] [In reply to] Quote | Reply

I use the 20mm Vittoria on a narrow hed jet 60 and I really like the wheel and it feels very fast. On my hed jet 90 C2 I use a s works mondo open tubular 23mm which feels a bit better but both wheels feel very fast. I'm running michelin latex tubes in both wheels. My vote would be for the 20mm vittoria!

Cheers

"I swim because that's how I get to ride my bike."



3Aims

Feb 11, 12 17:00

Post #3 of 15 (4029 views)
Re: Conti GP4000 700x20 Vs Vittoria Open Corsa Evo CX 700x20 [Cake] [In reply to] Quote | Reply

Cake wrote:
Hi guys,

Its come down to a choice between these 2.

Going to put them on a SRAM S80 which is a pretty narrow wheel.

Has anybody found either of these 2 tired to be bad?


I'll be riding them for training and racing Oly to Ironman. So I do want some puncture resistance too built into the tires.

I don't see a 700x20 in the GP4000s (Black Chilli) will be using that tire in 700x23 in my rear Hed disc.

Many Thanks for your feedback.

-Cake

Totally different tires. Speedwise, the Evos kill the GP4000. Treadwise and flatwise, the GPs win. Train on the GPs. Race on the Evos.


amagangan

Feb 11, 12 17:37

Post #4 of 15 (4008 views)
Re: Conti GP4000 700x20 Vs Vittoria Open Corsa Evo CX 700x20 [Cake] [In reply to] Quote | Reply

I've used both. The Evos feel much smoother and faster, but I got a flat in one race. I don't really want to blame the tyre though... I didn't have my track pump with me on race day, so I inflated them with a small portable pump, and I think I didn't get them to normal pressure (I race at close to 120 to minimize chances of flatting). I got a flat in the first 3 miles, replaced the tube, pumped it hard with my CO2, and was fine for the next 109 miles.

They feel great so I will race on them again for sure, just at much higher pressure. The GP4000s are nice, but not as buttery smooth as the evos.


SeasonsChange

Feb 11, 12 18:33

Post #5 of 15 (3969 views)
Re: Conti GP4000 700x20 Vs Vittoria Open Corsa Evo CX 700x20 [Cake] [In reply to] Quote | Reply

neither.

vittoria oc 23mm. the 20mm version has less than optimal rolling resistance that is not offset by its narrowness.


morey000

Feb 11, 12 20:47

Post #6 of 15 (3887 views)
Re: Conti GP4000 700x20 Vs Vittoria Open Corsa Evo CX 700x20 [SeasonsChange] [In reply to] Quote | Reply

SeasonsChange wrote:
neither.

vittoria oc 23mm. the 20mm version has less than optimal rolling resistance that is not offset by its narrowness.

Really? I would have thought that the aforementioned advice was right on: "Totally different tires. Speedwise, the Evos kill the GP4000. Treadwise and flatwise, the GPs win. Train on the GPs. Race on the Evos. "

So, even with a narrow (or- uh, regular sized) wheel, the reduced rolling resistance of a 23mm tire outweighs the aero benefit of a narrow tire on a narrow rim?

I can understand using the 23mm tire on a C2 or Firecrest- but on an S80?

Tell us more!


SeasonsChange

Feb 11, 12 21:04

Post #7 of 15 (3871 views)
Re: Conti GP4000 700x20 Vs Vittoria Open Corsa Evo CX 700x20 [morey000] [In reply to] Quote | Reply

the only current option for a narrow and good rolling tire is the conti supersonic black chili @ 20mm.


Cake

Feb 12, 12 1:22

Post #8 of 15 (3809 views)
Re: Conti GP4000 700x20 Vs Vittoria Open Corsa Evo CX 700x20 [SeasonsChange] [In reply to] Quote | Reply

They are fast no doubt, but I need something that i can train on also, roads I ride on have a lot of small stones and debris from cars. And I don't want my front blowing out while I am descending a mountain at 60km/h. Would I as an age grouper notice the difference between by speed on a supersonic or Open Corsa with the same latex tube inside of it?


This is how they are described by conti:

This tyre is intended for race use only in solo events, and is not recommended for road races or training rides due to its short tread life. There is no extra puncture protection with the Grand Prix Supersonic due to the lightweight construction. Riders should weigh up the compromises that they are willing to take before selecting this tyre.










Barchettaman

Feb 12, 12 2:00

Post #9 of 15 (3800 views)
Re: Conti GP4000 700x20 Vs Vittoria Open Corsa Evo CX 700x20 [Cake] [In reply to] Quote | Reply

Get a cheap training wheelset with durable training tyres.
Keep the S80 wheelset, with Conti Black Chili supersonics, along with the aero lid, for race day.
There's one very fast guy on here - nick in the seychelles - who has a full wheelset AND drivetrain exclusively for raceday. Makes a lot of sense.
Best of luck whatever you decide
-------------------------------
´Get the most aero and light bike you can get. With the aero advantage you can be saving minutes and with the weight advantage you can be saving seconds. In a race against the clock both matter.´

BMANX


jackmott

Feb 12, 12 5:53

Post #10 of 15 (3751 views)
Re: Conti GP4000 700x20 Vs Vittoria Open Corsa Evo CX 700x20 [Cake] [In reply to] Quote | Reply

ahhh

insisting on training and racing one the same tires

where you pick between high risk of flatting in a race, or slower racing, or a bit of each.

and the solution to the dilemma is so easy!


Austin Texas Group Rides - Updated for 2014
Aeroweenie.com -Compendium of Aero Data and Knowledge
Freelance sports & outdoors writer Kathryn Hunter


rbuike

Feb 12, 12 8:30

Post #11 of 15 (3698 views)
Re: Conti GP4000 700x20 Vs Vittoria Open Corsa Evo CX 700x20 [3Aims] [In reply to] Quote | Reply

3Aims wrote:


Totally different tires. Speedwise, the Evos kill the GP4000. Treadwise and flatwise, the GPs win. Train on the GPs. Race on the Evos.


Agreed. The GP are great tires but I find the EVO to be a faster, smoother ride, just not as durable as the GP. But I would suggest sticking with 23mm. The slight aero disadvantage is made up for with a smoother ride and less rolling resistance.

Rodney
TrainingPeaks | Altra Running | ICEdot | X-1 Audio
http://www.goinglong.ca

(This post was edited by rbuike on Feb 12, 12 8:32)


Quel

Feb 12, 12 8:36

Post #12 of 15 (3687 views)
Re: Conti GP4000 700x20 Vs Vittoria Open Corsa Evo CX 700x20 [SeasonsChange] [In reply to] Quote | Reply

SeasonsChange wrote:
neither.

vittoria oc 23mm. the 20mm version has less than optimal rolling resistance that is not offset by its narrowness.

This isn't the first time I've heard people talk bad about the 20mm corsa evo cx. Where's the data coming from?


JimMoss

Feb 12, 12 9:14

Post #13 of 15 (3660 views)
Re: Conti GP4000 700x20 Vs Vittoria Open Corsa Evo CX 700x20 [Cake] [In reply to] Quote | Reply

My setup:

Training: GP4000 700X23
Racing: Vittoria Open Corsa EVO 700X23


beston

Feb 12, 12 10:21

Post #14 of 15 (3610 views)
Re: Conti GP4000 700x20 Vs Vittoria Open Corsa Evo CX 700x20 [Quel] [In reply to] Quote | Reply

SeasonsChange has made similar comments in other threads. He's said that Bontrager has produced these results, but I haven't been able to find them (and I don't know if he's willing to share this).

As I understand it, the main argument for poor crr on the 20mm version is that the tread width extends too far on to the sidewall (they use the same tread layer on both the 20 and 23mm), thereby compromising the pliability of the sidewall.

I'm likely going to try out the Conti SS 20mm this year (for races only) and see how that holds up.


brian66

Feb 12, 12 18:26

Post #15 of 15 (3544 views)
Re: Conti GP4000 700x20 Vs Vittoria Open Corsa Evo CX 700x20 [3Aims] [In reply to] Quote | Reply

3Aims wrote:
Totally different tires. Speedwise, the Evos kill the GP4000. Treadwise and flatwise, the GPs win. Train on the GPs. Race on the Evos.

Agreed, but if you need one tire for both, go for durability especially if it's a tubular...23s will also hold up better.

   
 
 
 



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