Vittoria Corsa

FIFY, since there are numerous Vittoria Corsas.

So you know the OP is running Tubular or Tubular TLR?

Clinchers

Michelin power tt with latex tubes!

So why suggest Speeds since they aren’t Clinchers? If the OP wants foldable Clinchers then Speeds won’t work.

Vittoria Corsa Speeds can be run as clinchers. Have done it for the last four years.

I run a Corsa Speed on the rear (now tubeless, but with a latex tube prior) and a GP 5000 TT front tubeless for sprints, olympics, and halfs.

Yes obviously if you have TLR wheels but the OP wasn’t specific.

No. No TLR wheels needed to run them with tubes.

I don’t know how durable other tires are but GP5000 is pretty fast and durable at the same time. I’m scared of getting a flat. I rather go bit slower but have peace of mind. Some fast tires are durable and strong. I’ve been running GP5000 clincher tires on 4 bikes between mine and gf’s and no issues at all!!

Misread what’s available- Tubular and Tubeless TLR. That makes sense. Misread it as Tubular TLR and my head was spinning.

How are the durability of these? I’m still rocking the pro4 endurance 2 for the durability but have been considering switching.

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My Strava | My Instagram | Summerville, SC | 35-39 AG | 4:41 (70.3), 10:05 (140.6) | 3x70.3, 1x140.6 | Cat 2 Cyclist

I was riding gp5000’s last year and flatted in both an Im and him race which both races took forever to take care of the flat because it fit tight on my wheels. Decided to try Michelin power tt in 2022 and it was much easier to mount and made it through two IM’s and Him with no issues. If you look at the flat protection on bicycling rolling resistance website it doesn’t come close to gp5000 in flat protection. Worked well for me though!

https://www.aero-coach.co.uk/...ling-resistance-data

Vittoria Corsa G2.0 Speed 23 front and a 25 rear.

This combination w/latex tubes beat me in my last TT - it is definitely fast. I was on 5000 TL tubeless w/ 30ml Muc Off sealant, 25mm front and rear.

Completely unscientific, but I've beat this rider in the past.

Rocked this exact tire/tube setup at Kona this year - they were great.

Just one race, but they felt great. Felt fast... which if I'm being honest is a big factor for me (and I'd hazard to say for most people).

I ran the Mich latex setup last year, worked great.

This year training is back to gp5000 latex but race will be the tubeless gp5000 TT limited setup. Supposedly gp5000 aero and also the low crr with it.

There is a new Dan Brigham interview on Scientific Triathlon and he is asked about his road TT tire choice. Michelin TT front with a Corsa Speed on the rear in a staggered 23/25 size was the best balance of aero and Crr. Whether he would switch to the new Conti 5000 TT if he wasn’t sponsored wasn’t discussed.

I know burnthesheep knows this, but to prevent confusion for others following this, the GP5000 TT "limited" is also called the GP5000 TT TdF

I’ve tried 23 and 25 in the same course switching back and forth to see which one is faster in the front. I did this not just one day. Did it for several days to confirm. 25 was definitely faster so I have 25 in the front and 25 in the back. I used GP5000 for this test. You can try for yourself.

I am sure there is a break even point between rolling resistance and air resistance. Brigham was moving at almost 35mph - at that speed air resistance was probably by far the limiting factor, plus the smooth surface allowed for very high air pressure in his tires.

If you ride slower, and/or need to use lower air pressure in your tires, you'll reach a point where 25mm is faster.

My suggestion - don't reach that point - use more power and ride faster!! :)

And beyond that break even, you have all the aero implication specific to each wheel and fork/frame combination.

Veloflex Record... and stay off the shoulders. They are small for their listed size and the non-tubeless are easy to mount.

Note that in the bottom chart, the CS is a 23mm, the others are 25mm: https://www.aero-coach.co.uk/...mics-of-racing-tyres

Which is easier to get on/off the rim in case of a flat: Conti GP5000 TT TdF or Vittoria Corsa Speed G2.0? Interesting that BRR rates VCS better at flat protection than TdF.

I ran that set up for tt’s last season but things might have changed in this regard. Ineos (Ganna) was running 28mm rear, 25mm front last month (and Bigham is their performance engineer). Interesting that Flo cycling in a recent podcast are also pushing the wider tyres are better for aero and crr when taken on balance.

I just got some new 5000 TTs. I managed to install one with no levers right out of the box on a HED Vanquish. I don’t know if it is the tire or the rim, but I couldn’t install without a tire/tyre iron on a HED Jet+. The Corsa Speeds tend to be a tight fit.

It would be interesting to take data like that in the figure and plot it against some measure of resistance to flats or something.

I have Vision Metron 81SL & Disc. Internal rim width is 19mm. Has anyone put them on these rims?

I was able to install the original gp5000 tl on a vision metron rim with no tools. If anything I think the newer tires are a little easier to put on, so I'd think you'll be fine

I'm curious, for us slower riders, where to start and stop with tire selection options. They are mind boggling.

My best 40k is 1:05 (that includes mount and dismount), run on a highway with some hills, on (well used) clincher Continental GT 4000 23mm front and back at 90lbs, with butyl inner (on a now aging original 3Pc). Assuming I still have the same power/weight/aero what sensibly would be the result of going to the Continental GP5000 TT 23/25mm combination (with latex).

So not 35mph but 37 Kph

Would anyone say it was seconds or a minute.....
I'll pay for minutes but not for seconds!

Going from a butyl inner in a gp 4000 ii s to a latex inner into a gp 5000 tt will bump you up by around 1.5kmh at your speed, shaving around 2.5 minutes off your 40km time. It is that significant.

probably a wash on the back wheel and u get the "comfier" ride with the wider tires.

I prob. do this year 25/28 with latex tubes

still curious about tubeless but not sure on a road bike/tt

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The entire event (IM) is like "death by 1000 cuts" and the best race is minimizing all those cuts and losing less blood than the other guy. - Dev

those differences are big. What CRR are you using for each combination ?

Going from a butyl inner in a gp 4000 ii s to a latter inner into a gp 5000 tt will bump you up by around 1.5kmh at your speed, shaving around 2.5 minutes off your 40km time. It is that significant.


Thanks..That's probably more than a new bike would give me...:0)

You're right. It should be 1kmh difference, still a nice number. I made a mistake initially. I'm taking a 0.0007 crr reduction for going from butyl to latex and 0.001 for going from the gp 4000 to the gp 5000 tt.

ya, rough, 240watts with a 0.25 cda .004 crr would gives about 53 seconds if you go to .003 crr

I think a .004 to .003 change is fair for the two tires in the real world. I suspect more like .0045 to .0035....

What is that formula again?

Power * ETA = mass * crr * 9.81 * speed + 0.5 * airDensity * cda * speed^3

If no altitude , no acceleration and no wind. ETA around .97 due to drive train efficiency.

Of course you need to move things around to solve for speed and calculate time based on course distance.

But didn‘t have the GP4000 this magic aerodynamics?

So the legend says. And the legend may or may not have been wheel only (without rider), on a specific wheel......

And did they take a step back with the 5000 ? I doubt it

There is only one thing that counts. The combination CDA/CRR must be faster and it's almost certain the 5000 is. By 1min over 40k ? I suspect that is pushing it. 30sec ? Certainly.

Reality is probably between the two.

Breaking news. Veloflex Record TLR 25mm is the new king of the castle. BRR has the results.

Very cool!

But this record will only hold until BRR members vote to test the non-TLR 25mm version.

At the very least this quantifies the Aerocoach findings. Two people can’t be wrong. Lol

For the price, speed, and flat protecction I have been super happy with the Specialized Turbo Pro T5 (they just changed it to that name). I have ridden faster, like the Vittorias everyone is recommending, but they seemed to always get flats.

For sure. After the debacle with mixing up the versions of the 23mm Record, it’s good to see some alignment. The claim of “fastest tire” is a big one!

That is what AeroCoach is saying as well. Results are on their rolling resistance page

Terrible puncture protection, I've got flat on 4 different Veloflex Record in ~2 months. Probably worth only for short time trial on very good and clean roads.

They've been good to me on clean roads. Bad roads will not puncture them (bad roads puncture tubes, not tires), pointy or sharp debris will.

Can the 5000 TTs be used on a set of Flo carbon clinchers? Sorry if it’s a stupid question- I’m not knowledgeable on tubeless options, so didn’t want to buy these if I can’t use them on clinchers with latex tubes