If you want an ultra low rolling tire, it makes sense to get one that is tubeless
592649
Not to open much of a pain to set up, like any other new tire it needs some coaxing. If your not familiar with the testing, two independent testers have backed up vittorias claim this is the fastest tire in the world, it is!  Its also allowed me to greatly lower my pressures, and so far with power meter testing my lowest rolling resistance on the rear is only 85. Adding comfort and grip in the process. Thats just me though you will be different with a different weight. Tubeless is also a big bonus. No problems getting them to seat with an air compressor. On to what you probably want to know- measured 26mm wide on 18 and 19.5 internal width rims for the 25mm version of the tire. Sorry I cant remember the height, but my giant propel has a tight height clearance on the v brakes and these fit, so it should be less than 25mm tall. And if you want a thin tt tire with no puncture protection, tubeless becomes the only protection you need, its the best of both worlds.
1579129
I would love to be able to give these tires a 5 star rating. From the second I put them on my Mongoose Dolomite fat electric bike it has rolled so smooth and easy. Easily making my bike roll at least twice as good. These tires feel amazing on the road and I haven't had an issue loosing grip in the rain, on loose pack ground, or anywhere else for that matter. The reason that I am not giving these tires a 5 star review is because they are paper thin, very soft, and easily allow almost anything to puncture through them. Since having these tires I have had more flat tires than ever in my entire lifetime of biking. I've had sticks poke through these tires with ease while riding slowly down a paved bicycle trail. The first time I got a flat with my rear tire using these tires I had to walk my bike about a mile and the entire side of this tire appears to have fallen off showing what looks like cloth all  around the sidewall which I assume would make the tire weaker but it's held up somehow. At 50 dollars for a tire I would expect a stronger tire than this. If you ride over sticks frequently watch out with these tires because you might as well be riding on a tireless tube as it provides almost no protection from the elements. Also worth noting I've had 3 blowouts with these tires from riding over hard bumps, I've never in my life had a tire that would just have a small section of the tire blow out, allowing the tube to blow out a hole in that spot before. But with these tires I have had 2 instances where I hit a large bump and a section about the size of my pinky finger just blew out of the tire allowing the tube to blow out in that spot making the tires completely trash afterward. The first one I put a piece of cardboard in the spot that blew out and duct taped it in, this held but the tire  ended up falling apart when I had to walk it home on a flat one day as mentioned above about the sidewall. These are easily the worst tires I have ever had on a bike and I regret buying them, not sure how I will feel about buying Origin8 or Vee Rubber in the future given this experience.
3247375
I purchased this item (likely will purchase more) in case my inner tube goes flat on my
<a data-hook="product-link-linked" class="a-link-normal" href="/Aosom-Wanderer-Bicycle-Bike-Cargo-Luggage-Trailer-Black/dp/B0083JHEG8/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Aosom Wanderer Bicycle Bike Cargo / Luggage Trailer - Black</a>.
I've had great luck with these inner tubes in the past on larger size 26 inch rims in addition to also using the&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/STOP-Flats2-MTB-Bicycle-Tire-Liner/dp/B0026R9DLM/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">STOP Flats2 MTB Bicycle Tire Liner</a>&nbsp;in the tires of my bicycle. However there are no STOP Flats2 Tire liners in that size (16 inch rims) so I guess I will have to improvise cutting these tire lines to the right length and improvising on choosing a size that hopefully will be applicable. Even with or without a tire liner the thorn resistant tubes do increase your probability of not getting a  unfortunate flat by being much thicker than ordinary inner tubes. The less weight carried on a bike trailer or a bicycle also decreases the probability of getting a flat since there is less force applied to the tire. Also going slower helps too (less force when hitting a sharp object and more time to react to possibly avoid road debris.
Anyway again I have personally had good luck with these tubes so far in another wheel size but haven't had an incident yet in which I have replaced the inner tube with this one on my bike trailer. That day will happen though and when it does I will be using these inner tubes.

Edit I made an error when inflating a tire on a second Aesom Wanderer bicycle trailer. The tire itself says 45 P.S.I. but later discovered after a blowout on the road that the cargo trailer instruction manual states to inflate to between 25 to 30 P.S.I. because of this discrepancy. So on both of my bicycle trailers I deflated the air pressure to 30 P.S.I. and I did use this inner tube with a tube liner put in first. So far so good. I'll have to order several more of these thicker inner tubes in the near future.
4475161
I was skeptical getting these wheels since I wanted to see if they made a difference.  I love the linear, smooth feel of road bikes, but I hate the riding position and I have a soft spot for mountain bikes.  But the knobby tires were wearing me out way to quick and all that effort led to little progress, even downhill.  So I decided to take the dive and bought these tires since I was already replacing inner tubes.

VERY surprised the difference it made.  Friction is MUCH lower compared to knobby tires and it's like riding on a cloud.  These tires have flared edges that I thought was interesting, but it lends itself to keep the tire in constant contact with the road through turns, keeping grip on the street at a max.

I inflated both wheels to 40 ft.lbs. (I have no psi gauge yet...) and went about on my way.  First thing I noticed, is that the extra air needed to firm up the tires leads to a heavier bike when carried, but this works to your advantage.  Since the friction is considerably lower, pedal effort is reduced.  And the extra air (weight) in a rotational mass (tires/inner tubes/air) keeps the wheel rolling longer.  Sorry, just a little science to help explain the extra weight to other reviewers/potential buyers. It balances itself out so the weight doesn't weigh you down and the pedal effort is considerably easier compared to knobby tires.  I would've expected to have paid at least $30-40 each tire for how good these are!

NOTE: From what I saw, these tires, although not labelled directional or marked that way, might be more efficient when rain comes if one mounts it so the treads that go to the edge are pointing back and away.  So it will look like |/  \|, with the slashes representing the grooves if you were to look down at the front tire from the bicyclist's point-of-view.  Make sure the back is mounted the same way as the front! You'll be glad when the rain comes around that you did so!

PROS:
- SMOOTH ride.
- Reduced pedal effort.
- Fast rolling tire.
- Perfectly capable for gravel, dirt, etc.  Although don't push it too much.
- EXCELLENT price, you will get your money's worth and then some.
- Quiet.  And I mean QUIET.

CONS:
- How quiet it is.  I bike on a college campus, and the quiet ride might attribute to pedestrians not being aware of you coming behind then. But that's what a bell is for!
- Uhhh... The wider contact patch and edge makes for a slightly more irritating install past the brake pads. (Actually, not really a con, I just can't think of any more with this tire! It's just THAT GOOD!)

Do yourself a favor.  If you ride more on pavement than gravel/dirt/etc. with your mountain bike, seriously invest in these tires!  They will make everything so much easier and much more enjoyable... well except maybe the pedestrian(s) who wanders into your path. :)
1019325
The photo is not what you get, tread looks wise,  and that's not a bad thing. The tread is more directional and has a better water/sand channeling center without adding rolling resistance.
For these, or any Kevlar beaded tire, I suggest grab one of these http://www.amazon.com/gp/product/B000C128PC/ref=olp_product_details?ie=UTF8&me= at the same time. I've been using one of them for well over 20 years and they make short work of the super tight bead seating of a new Kevlar tire. Another tip is put enough air in the tube beforehand so it sits fully round but just barely, probably 1-2psi or so. It keeps the tube from pinching between the lever and rim. Tubes used to come covered in talc making things much more easy for even a novice to change their own stuff. Once the tire is on put about 20psi of air and thoroughly check the bead for correct seating. Do another partial fill to about 40 psi and check one more time. If it's got spots that aren't exactly seated by being too deep you can grab the tire and twist at the point where it's too deep and often feel it pop into perfection. The max on these is 75psi is why I suggested the numbers beforehand. For mountain bikes or others that use less maximum pressure, lower the numbers to about 10psi, then 20 psi before the maximum of~ 40-45.
Anyway back to the tires.
Once installed I took them out for a spin on my Schwinn hybrid and road only pavement. They were a smidge noisier than the oem ones with the Schwinn sticker but those were very noisy when they were new also. Traction in corners was nice and felt like they were one with the road. I found some long puddles and tried the center water shedding area and never felt like I was hydroplaning in the least. Sand  and small gravel along roadsides was also not a problem like the originals sometimes were at low speed. I didn't notice any rolling resistance difference ,a surprise because the tread feels a little grippier when I rubbed my fingers across the tread before the ride.
Time will tell how long the treads last but I really like how these tires handle so far. They handled rough , wet, and dirty pavement like it was clean, dry,  and smooth. At the price Amazon is asking if they only last a few hundred miles I'll still consider them a good value.
3191485
Since I like a little dirt on my roads, I typically ride on WTB Nano's on my FELT F5X.  Riding on a regular road tire was so much faster and easy rolling.  This tire held up pretty well on my first century with no issues.
I may post again once I get in a few more miles.  Good tire but I guess I have to put more than 100 miles on them to truly tell the tale.
3017060
These are the best low priced tires on the market. Obviously some people give these a bad review because they got a flat, but that's hardly fair considering you can get a flat on any tire, any time. I've owned a few of Zaffiro Pros and ridden them on relatively tough street terrain with no problems. My frequency of flats is the same as my buddy's bikes with Gatorskins. The colored tires are pretty slick too.
3509172
This is a very versatile tire.  It works very well on the road because the rolling resistance seems low relative to an offroad tire.  I noticed how much less effort is required to get the bike going and maintain speed.  They also work well on grass and soft ground.  They are quite wide and offer good floatation.  I could see if problem with hill climbing on a slippery surface because they have little to no tread.
324854
I bought a Gorilla brand cart from Lowes and love it. The cart is just what I was looking for to work in my garden....but it had pneumatic tires that were ALWAYS flat. I live in an area that has a lot of thorny plants and found it impossible to keep the tires inflated...tried fix-a-flat, tried putting the gel into the tire...nothing worked. Started shopping for a flat free tire and found plenty types for a wheelbarrow and none that fit the cart because the hub on my cart was too small to fit most tire.  For those that don't know...where the circle is, is where the shaft goes in and that is called the hub. Measured the shaft on my cart and needed 2.25" to fit the hub of the tire...once I had that, I had a tire that fit. The tires on my cart were 13" and these are 12.50" but not enough of a difference that you would notice. BUT, with that said...the flat free tires are heavier and make for a heavier cart...you notice it on grassy surfaces because you have to pull a little harder.  Is it worth it? Absolutely, YES because I never have to worry about having flat tires on the cart...it is always available for a job. Awesome not to have flats anymore! Yipppeee!
350893
I ride ungroomed trails and  was spinning out on the climbs due to a lack of traction, these tires have solved that problem. These tires are not tubeless ready but I'm satisfied with the value for the money.
3993332
I watched the wtb utube on how to apply this tape and set up tires tubeless.  While simple, it was worth the 5 minutes.  Tape and tires (WTB) worked great.  I was able to inflate tubeless with my floor pump.  That has never happened before, but mostly due to watching the video and seating the bead.  Perhaps also the WTB tires.  Quality brand and good product.
4190781
They roll like a dream and have not had any flats... "Knock on wood ". I sold my older bike with these since i was lazy to take them out and bought the same exact tires.
2639625
Good  wheel to replace one that kept going flat on my generator.  Those tubeless tires are often a headache if you let them sit for long in  one spot. These solid rubber tires  make life easier when you  use them instead.
2956521
Outstanding tire. Huge volume and Very low RR!  Easy tubeless set-up and maintains pressure well (loses about 2PSI a week).  Durable over packed sand, pine forest terrain, and gravel here in FL.  Also quick on tarmac used to get to my local trails. I generally put about 5000 to 6000 miles on a set. The older sets are still good with a couple Milimeters of center tread and I've used them as temporary replacements-like when I ran over a Sawzall blade. Two tubeless failures in 11000 miles with Stan's and Glitter- both in the tread.  I've run Schwalbe TB/RR set ups and have always come back to Race Kings (RK/RK or RK/XK).  It's a superior tire and worth the 40 to 50 bucks I typically buy them for.
1633915
I never got another flat after getting these. However, I also had armored tires. Prior to the armored tires and heavy duty tube, I got a flat every week. Afterward, I went a year and no flats.

Why only 4 stars? Armored tires and thicker tubes add rolling resistance. The extra resistance was not bad, but I just did not roll and coast as effortlessly and continuously as I did with the standard tires.

If you want to get to work in a predictable amount of time and don't mind a little exercise, get these. If you want to win a race and don't mind having to change a tube once in a while, skip these.
4015356
I only had them for a about a week before my bike was stolen, but they rolled a lot smoother than the original tires I had on my mountain bike. Makes for a quieter, smoother ride for city, street riding. I can't comment on their abilities on trails, since I didn't get the opportunity to test them out.
3594614
Great tires, I like their low rolling resistance,  cushioned ride, and they look great too. Although they are 26 inch tires they are very close to a 650 diameter due to their size. :)