Because of flexible glue!

Tire Rolling Resistance

This also suggests linear relationship of higher pressure= lower rolling resistance.

I don't necessarily think much of Brandt, and I haven't seen the work that formed the basis of that piece, but even putting that aside, it cannot be categorically true that one type of tire is faster than another.

Rolling resistance really depends on the attributes of a particular tire, and so some clinchers are faster than some tubulars, and vice versa.

Looking at Anhalt's Crr tests on BikeBlather, his findings might support the conclusion that clinchers are, on average, faster than tubulars (looking at the top 25 fastest tires), or the conclusion that a clincher would likely have a higher Crr than a tubular in general.

But, it depends on the tire, so speaking in generalities means very, very little.

Also keep in mind that the results on smooth test machine surfaces are supposedly different than on rough roads. On rough roads the Crr is reported to decrease up to a point with increasing pressure and then start to increase from power loss due to skipping of the poorly gripping hard tire on the uneven surface. I have no reference to such results and am just repeating what I have seen on this forum a number of times.

Bottom of this article:
What's in a tube? - Slowtwitch.com

I don't get this. After a few hours, tubular glue (Vittoria Mastik) dries relatively hard. It does not feel 'rubbery'. During riding, the amount of deflection within a thin layer of stiff glue vs. the tire casing itself is tiny. I value the opinion of Brandt about as much as any other bike person (add Sheldon Brown), but this does not make sense.

In any case, on race day, the entire pro peloton is on tubulars. The insurmountable advantages of tubular wheels include by far the lowest rotational mass, resistance to pinch flats, safety after flatting, and the ability to run a very wide range of pressures. Plus better heat dissipation. Clinchers wheels are fundamentally handicapped by design; they will never be used at the highest levels.

This conversation will be moot once tubeless road tyres take over. Give it 1~2 years. No tube is always better than any solution that includes a tube. Lower weight, lower rolling resistance and softer ride, what's not to like?

The ability to safely ride a puncture until neutral service can come up with a wheel change.
Tubulars allow that, no clincher design does.
For training it doesn't matter, in a race it certainly does along with the lightest weight tire/rim combination, most supple ride and best handling.

Other than that.....

-Bandera

I have always felt that if tubeless tires gave an advantage in the pro ranks, they would be using them already.

+1

Bend in the Road: Tyre makers still split on tubeless - BikeRadar

That data is from the early 2000's, we have come a long way since then. Despite all the advances in clincher technology, tubulars still rule the pro peloton. I ride tubulars exclusively, every time I get a wild hair to try a clincher I remind myself about the 3 miles I had to ride back to my car at the end of a long day after I ripped a whole in my sidewall. With a clincher of any kind 1 would have had to walk those 3 miles.

Seeing that the tubeless mafia has forced themselves into this conversation I'll just throw in my $0.02

Been running tubeless for less than a week, and being a heavier rider (199lb) means I have to run ~100psi on 25mm clinchers to minimize pinches. Ride quality sucks, to say the least. Running 23mm at 75-80psi (tubeless) makes a world of difference in terms of absorbing more road buzz and providing a more supple ride. Might not be the lightest or fastest tires, but goddamn they feel good. Tubeless is probably less relevant to lighter rides who regularly ride under 100 psi with no worries. It should be noted that the lack of an inner tube does not make the system any lighter -- in some cases it will be heavier compared to the top quality clinchers and tubes.

Can't comment much on flat protection or road side repairs (I hope that day never comes...not sure I'll be able to get the tires off) given that I've only put around 30 miles on them but I definitely can't see myself going back to clinchers.

Tubeless and discs go together, won't be long before that's all there is in high end bikes, I can't wait. I love true innovation, mechanical 11 speed with 23mm tubed tyres and rim brakes is the same old crap with a new paint job.

tubulars weigh more too

Too narrow for your weight, need to look at 28mm or even 32mm wide tyres. I'll bet your frame is pushing it at 25mm wide, old fashion design rules, narrow isn't faster....

The frame/fork clearance isn't an issue, its the short reach caliper brakes that might make fitting a 28c difficult (haven't tried to be honest). In any case I'm pretty happy with my current setup I don't have much incentive to go back to clinchers for my road bike, but I do run 28/32 F/R on my commuter bike.

I don't get that. What does short reach have to do with wide tires. The brake track is in the same place and is the same width.

I've ridden a clincher tire 6 miles to get home with a flat. I did ride slowly and would have ridden a bit faster on sewups, but riding was much quicker than walking. No damage to the rim and no additional damage to the tire either.

The brake track is in the same place, but a fat tire will extend farther up above the rim. Short reach brakes don't have as much clearance over the rim.

[MENTION=183557]rpenmanparker[/MENTION] ^ that's my understanding as well. I remember when 5800 came out Shimano were stressing the whole long reach brakes being able to accommodate 28c, which suggested that it wasn't possible with the previous iterations. Also, back when I was running 25c clinchers clearance between the tire and the brake arms was pretty tight. which is why I was never tempted to try 28c.

Is 3 miles a long walk? When I ripped my rear derailleur off last month I walked home 8. Weather was nice.

If you had a boot & a spare tube with the clincher you still could have rode home.

What are you running for tires/sealant?

Thanks to you both. It must be the width of the arms where they start to drop down, not actually their reach. I guess long reach brakes are shaled so they don't curve down as extremely.

Ha! I don't think so. How much does your clincher tire plus the tube weigh? My tubular tires weigh in a 250g each(Vittoria Corsa CX). The lightest clinchers I could ever find were 165g, and that was without any flat protection(Schwalbe Ultremo ZLX). The lightest tube to go with it was 50g(Continental Race Supersonic). So I was sitting at 215g with no flat protection. If I want to run a tubular tire with no flat protection I can get down to 175g (Vittoria Crono CS).

Then you have the heavier clincher wheels. My Zipp 202 tubulars with a heavy PowerTap hub weigh in at 1250g, in 32mm. With a normal hub they would be around 1100g or so.

Schwalbe One tubeless and Stans NoTubes sealant. I haven't put them through the paces as yet, but If I make it to the end of the 5BBT without a flat these tires are legit.