Tubular vs tires in road bikes.

oldbobcat

Don't believe I've ever had tires or tubes with removable presta valve cores. I've heard that Continental uses them now and Vittoria had them in the past. Enlightenment, please?

alienator

Vittoria, Conti, Veloflex, Vredestein, Schwalbe, Dugast, FMB, Zipp (aka, Vittoria) all have 'em.






And so does Tufo (I didn't want to include Tufo in the same sentence with good tubulars.).

oldbobcat

So how is a Vittoria valve core removed? I've got the (ahem) inexpensive Rallies (and they're actually quite decent considering I could stand to lose another 15 lbs.) And thanks for the tip on the Tufos.

Biker Joe

They unscrew with the use of pliars or a valve tool.

alfeng

NB. Not all Presta valve cores are removable.

Solanog

That's true, mine also are Rallyes, which by the way are great for me,compared to more expensive clinchers, the ones I have are not removable. So I don't know if I can introduce those "healing" products in those tubulars or for the same effect on any other non removable valve.
Is it possible to use those products on non removable valved tubulars or tubes?

alienator

Pitstop, Geax, and others that fill the same, i.e. by injecting a latex foam solution under pressure, can all be used with non-removable valve cores.

Solanog

Would those protect against big holes, mine seem always to be big ones. Generally I get pieces of glass and the result is like an explosion, the inner tube gets a big hole as well as the outside casing. I'm running now on only 100p.s.i. I don't know if higher pressuers promote that.

oldbobcat

I tried that on a trashed Continental Triathalon tubular. Didn't work.

Obviously, some do and some don't. The expensive tires probably do in order to work with valve extensions for use on aero rims.

oldbobcat

Probably not. Latex innertubes on the better tires might give you a little more leeway since they're more elastic, but that that piece of glass will eventually cut through if you don't remove it right away.

sideshow_bob

Horses for courses, if I'm running (racing) on nice clean roads then a set of wheels with Veloflex tubs are fantastic, but in amateur racing without a team support car and rider to help ride you back on, a set of wheels where you are minimizing any chance of a flat is more than jsut a little useful, and unfortunately thats not the Veloflex.

Tufo do that High Carbon tyre which I've found to be pretty indestructible, actually I've never flatted one. They ride okay, and when I'm racing on questionable roads, I'll usually take the wheels with these on them.

I'll also note that some of the ultralight tyres Tufo do are pretty decent on indoor wooden tracks.

--brett

Steve_B

I guess if you looked hard enough you could find some set of conditions where anything might just be better than anything else.
It’s more than three sets. For #1: montonic with respect to what? I think we already know what happens to Crr with changes in inflation pressure.

The data shown on BikeTechReview was indeed taken on rollers. It’s really the only way to do it as a practical matter. I was not involved and I am not fully up on all the testing however, as you can imagine the question came up “how applicable is this to the real world?” I remember their explanation was that over other surfaces, pressures, temperatures and rider weights, the absolute values will certainly change but ranking between tires would hold.

According to the BTR data, some tubulars are better than others. Some clinchers are better than others. In fact, some tubulars are actually better than some clinchers. However, based upon the tests available on BikeTechReview, many clinchers are better than many tubulars and of the ones they tested, the best clinchers are better than the best tubulars. If you pick the wrong clinchers e.g., Tufo S33, you will be slower than a good tubular, e.g., VeloFlex Record, but you can do better than the tubular with an even better clincher, e.g., Michelin Pro 2 Light SC with a Michelin Latex Tube.