Vittoria pista speed G? But seriously, without resorting to track tires I think you're stuck with Continentals. They're not bad tires but you won't get a latex tube.

Vittoria Corsa Speed is the current fastest tubular tire: https://www.bicyclerollingresistance.com/...a-speed-tubular-2017

However, it's only available in 23mm. Continental Competition is 5.1 watts slower per tire, which is significant.

Yeah that's what I found as well, but maybe the rr savings from running corsa speed will outweigh the extra draft from running 23mm tires on a 20mm front wheel?

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Terrible Tuesday’s Triathlon

What front wheel? Vittoria Crono were the fastest tubulars that were narrow. I used to run them on my H3C and Stinger Disc years ago. You can find them on eBay every so often. If you can find a Vittoria Triathlon in 21mm that’s a good choice, just send it to tire alert to replace the butyl tube with a latex one.

Its a older 808, now just leaning towards getting a pair of corsa speed though as options seem limited for 20mm. Wont have time to send them anywhere as i need them in one and a half week.

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Terrible Tuesday’s Triathlon

I've found 21mm Vittorias (typically Corsa CX) NOS on ebay. That's still a pretty fast tire.

The question is if they will be faster than corsa speed 23mm...

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Terrible Tuesday’s Triathlon

If you are willing to run the speed
You should consider the vittoria crono 22 mm meassures 21 mm. Jens said its super fast in his testing je said fastest tyre he ever tested and you will find it in UK online shop.

Having ridden mime as rear wheel for 400k 600-800k is likelywhere I will stop at front you should get more 1000- 1200 k

The vittoria cx 21 is latex its a good bit more robust lol.

Get a Continental tubular, send it to these guys (https://www.tirealert.com/send-your-tires), and ask them to install a latex tube.

And now you have a Pro LTD tubular :)

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Alex Arman

Strava

Can't answer that without a wind tunnel. Given how soon you need it, I'd get a pair of Corsa Speed 23's (which likely measure less than 23mm). Then if you find a faster solution later, you just peel the front tire and have a spare rear.

Pista Speed G+. Come in 19mm for the front and 23mm for the rear.

After reading this thread I went to the garage and found two unused 21mm Vittoria CX II tires (and a third slightly used one), and one unused Veloflex Record (probably 22mm but it doesn't say). I will never use any of these, so if anyone wants one let me know and I'll let you have them pretty cheap.

Corsa Speed, probably. I used those this season and had 3 flats from august to june. So won't be using them again. Fast tyres, but IMO not suitable for long course.

Damn, was that with sealant? I have two races where I was planning on using them a half in a few weeks, and a full with a 202km bike in august. I think for the full I will take Gp4000s or something like that as I really don't wan't to flat and it's 2k+ elevation, but the free speed is going to be more important in the half.

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Terrible Tuesday’s Triathlon

First flat was without sealant and the last 2 had sealant in. Maybe risk it for the half, assuming good roads and have Contis for the full?

You could try the Corsa. More puncture protection.

Yeah that's prob what I will do, did the half last year and roads were pretty good. Thanks for the help!

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Terrible Tuesday’s Triathlon

So says the current reigning 2018 OVERALL US National Standard Distance Duathlon Champion...yep, good advice. Take it. He knows what he speaks. ;-)

The 70.3 I did in May, the roads were terrible, it was stormy and the roads were covered in debris. Loads of people flatted, I didn't, then 2 weeks ago, did a 70.3 on great roads and flatted 10kms in.... oh well. Shame as they are great, fast tyres.

If these are the original 808 tubular rims, the recommended tire width was 21. I'm sure 20s are just fine, but no need to restrict yourself to them.