Home > Event Coverage > Frostbike

FrostBike 2013: Hands On with Schwalbe’s new Ultremo ZX Tubeless Road Tire

27
Support us! Bikerumor may earn a small commission from affiliate links in this article. Learn More

Road tubeless is a technology that has a lot of folks excited, yet the roll out has been a bit slower than expected. With Hutchinson more or less leading the way, for a while any other tires were simply rebranded Hutchinsons, however other companies seem to be closing the gap and bringing their own tires to market. Schwalbe happens to be one of those companies as they offer their new Ultremo ZX Tubeless road tire which was first introduced at Interbike, and is now about to enter the wild. Billed as the lowest rolling resistance tire that Schwalbe makes across the board, the 700x23c tire is apparently the fastest tire they make.

We threw it on our scale to test out the claimed weight, after the break.

Keep in mind that this is a pre-production sample, so 309 isn’t terribly far off from the claimed 290g.

Subscribe
Notify of
guest

This site uses Akismet to reduce spam. Learn how your comment data is processed.

27 Comments
Oldest
Newest Most Voted
Inline Feedbacks
View all comments
Dave
Dave
9 years ago

Nice! Now if they can just make one in a 25c version

Mike
Mike
9 years ago

how much does a rubber band weigh?

Lloyd
Lloyd
9 years ago

Yes, really, the last thing we need is another 23c tubeless. let’s get some 25-28s going

Steve
9 years ago

Needs larger graphics.

Chris
Chris
9 years ago

Agreed….need more 25c & 28c Road Tubeless Tyres. And better mileage than Hutchinsons too…..

Matt
Matt
9 years ago

Give me something wider.

Would love to have 28-32 for commuting. Just today I got a tiny piece of glass that should have just been a pull & seal deal with tubeless, but instead meant a whole tube change and a no-go time-wise to tack on a fun portion to my ride.

CMSF
CMSF
9 years ago

Chalk up another vote for wider tubeless tires please. But do the industry types read these comments?

Jacob
Jacob
9 years ago

I agree, needs bigger graphics. Not sure if people will know that you are riding tubeless… (just kidding, I’m sure the final production model will look different).

MattS
MattS
9 years ago

Echoing calls for wider options, please. 25 and 28 in the same casing construction to start. Once 25s are available, I will never buy a 23 again for the road.

MattS
MattS
9 years ago

QBP, are you hearing us? Schwalbe, are you reading? 25s and 28s will allow tubeless to go big.

Velo
Velo
9 years ago

Yes, 28C please! Hutchinson, Bontrager, Specialized, Maxxis make 23C and 25C tubeless tires, but no one makes a 28c tubeless.

isaac
isaac
9 years ago

Specialized and Trek both already have 25s available, pair that with the new 25mil width Belgiums and you may have an almost bearable tubeless road setup. 309 grams for a tire is bullcrap, you can run a nice tire and put Stans sealant in your tube and come out with lower weight.

Fraser C
Fraser C
9 years ago

Too heavy! Conti Supersonics + tubes = half a pound less for the pair, without counting the rim strip, valve and Stans for this setup!

Dustin
Dustin
9 years ago

Running wider and wider tubeless tires (at high pressures seen on road bikes) can create several engineering challenges because the wheel must take more and more of the pressure. This is less so the case with tube/clinchers and non-existent when considering tubulars.

Want a supple ride with no flats? I’d try out a wide tubular with stans in it. Probably just as easy to set up and change as some of these tubeless set ups anyway…

greg
greg
9 years ago

i’d settle for a 23 or 25c tubeless that actually measures how it’s lablelled.

Hashbrowns
Hashbrowns
9 years ago

I wish people would stop saying “23c” or “28c.” Tire width is measured in Millimeters. The size is 700C by 23mm.

Velo
Velo
9 years ago

> I wish people would stop saying “23c” or “28c.” Tire width is measured in Millimeters.
> The size is 700C by 23mm.

Well the diameter is in millimeters too… so you just violated your own rule by saying 700C instead of 700mm.

Almost every bicycle tire manufacturer designates their tires in the manner 700x23C.

mateo
mateo
9 years ago

@velo – Really? 700mm? The “C” in 700C has nothing to do with cm. There are (were) 700A, 700B, 700D size tires too.

Johnny
Johnny
9 years ago

All: the “C” in 700C stands for “clincher.” They are 700mm wheels (measured with a tire installed, so you’ll never really get an exact 700mm diameter, but that’s the theory), and called 700C for clincher wheels.

Hashbrowns is right – tires are measured in millimeters. They are also labeled 23c or 25c, though, because they are clincher tires.

carl
9 years ago

Ha Ha Ha hahahahahaha…. what’s next? Press fit BB’s? Ha ha ha ha hhahahaha

bob
bob
9 years ago

> Well the diameter is in millimeters too… so you just violated your own rule by saying 700C instead of
> 700mm.

I hope you know how stupid you sound. Go read yr Sheldon Brown.

(700c tires are 622mm bead to bead circumference)

Psi Squared
Psi Squared
9 years ago

Bob, I think you meant 622mm bead to bead diameter. A 622mm circumference tire would have a diameter of about 198mm.

Velo
Velo
9 years ago

@mateo: I made no claim that C stood for cm. Perhaps a visit to your optometrist is in order.

@Johnny: The C doesn’t stand for clincher. Nor does it stand for cm.

@bob: Everything I said is correct, and you are the one that needs to re-read Sheldon Brown.

Let’s restate the facts. We are referring to tires which measure approximately 700mm x 23mm. The common nomenclature for these are 700x23C. You will find that nomenclature in nearly every manufacturer’s product literature.

Hashbrowns stated “I wish people would stop saying 23c or 28c. Tire width is measured in Millimeters. The size is 700C by 23mm.”

I pointed out the the internal inconsistency of Hashbrowns’ request, that tire widths must be denoted with the accompanying mm designation under penalty of death, but somehow it’s okay to put the C behind the 700 when in fact the 700 is in mm too.

And then it went downhill from there.

wsquared
wsquared
9 years ago

When I saw “hands on,” I was expecting at least a brief road test. Ride the damn tires & report back!

CoolzLab
CoolzLab
9 years ago

Come schwable , screw 23’s. it’s all about 25-28 for most of us.
Yes you can! We are waiting!

Subscribe Now

Sign up to receive BikeRumor content direct to your inbox.

Subscribe Now

Sign up to receive BikeRumor content direct to your inbox.