Testing Duro Hypersonic 25mm tyres.
The word Duro is of a Latin, Asturian and Galician origin. Duro, as is durable, as in durometer…
From dūrus (“hard”)
As the 2017 R002 iterations continue, I have been experimenting with different tyre widths and brands on the rear Ekay 23mm wide wheel. I have gone through the Conti Ultrasport II 28mm, which winds up being 30mm on a 23mm rim, which was too wide for the chain stays.
Then I fitted the Ultrasport II 25mm, which measured in at 26.75mm and that was fine for clearance. There is no questioning the performance of the Ultrapsort II, but I wanted a true 28mm on the rear. Next I went with a Vee Rubber V055 28mm, which measured in at a true 28mm on the wheel. But after initial evaluation, as I put more speed and lean angle into it, I did not like the ‘feel’.
So the next lucky contestant was a Duro Hypersonic 25mm wire bead (Bought for $15 usd on Amazon). The 25mm measures in at 26.5 mm on the 23mm wide wheels. No, still not what I am looking in for in terms of width, but the performance of this tyre is amazing. Really. Duro? Never herd of them you may say… Duro is a company out of Taiwan and has been around for a long time and their products are expanding and their quality consistently improving.
Billed a ‘training’ tyre, the Duro is what I refer to as an intermediate (both tread and compound ) or,designed with a semi-slick type tread. It has a 120 rated TPI casing, weighs 205g, with a 60A durometer compound. (50A being the softest and 70A being the hardest of bicycle tyres) The tread/surface design is very utilitarian (also very cool looking imo) and provides excellent grip both on the edge of the tyre and under braking. The only downside with the tire is its inability to soak up small pebbles and rocks. They slip just slightly off slight ripples, bumps and very small rocks/debris.
A nice round profile, with more ‘slick’ surface than treaded surface, which I believe is the Hypersonics advantage. It has just enough tread for damp/wet and cool conditions while in normal conditions is a stellar performer in my humble opinion below… (Note: 38 mph apex speed on Kitchell and 35mph apex speed on Fairfield)
|Ride||Into the South Wood-Lands…of LBR||0.5km||13m||51s||Apr 2, 2017|
|Ride||Kitchell Süd Kurve||0.5km||22m||41s||Apr 2, 2017|
|Ride||[F]-Airfield (cleared for takeoff!)||0.4km||8m||33s||Apr 2, 2017|
|Allen Rd Descent 1.6km -5%||AVG||MAX|
Now I’ve been thinking about so-called Training Tyres or Tires…which ever you might prefer! If a tyre is good enough to train on…meaning your training, typically starting off easy but wind up with a rider pushing very hard as their goals get closer. So are riders not riding similar to race or competition conditions as they progress? I find that hard to buy. In fact, I don’t buy it. So that aspect imo, is hog wash. Now, as far as weight goes, okay, so a ‘race’ or premium tire will be lighter, no questioning that.
So, is 50 to 60 grams +/- a tyre really worth somewhere around $100 or more dollars? LMAO! I suppose if you have money to burn…okay, but it’s not only weight you say…it’s rolling resistance! Ah ha! Perhaps, I reply… perhaps, a few watts here and there ( btw, you do know that tire companies test RR on a drum in perfect conditions, right? ) Insert laughing emoji…
Folks, it’s mostly ALL marketing rhetoric, yes, there are some discernible differences from a race tire to a training tire, but mostly negligible for us mere mortals. Except for the best of the best riders, the differences are not going to be that noticeable or provide any real world gains. here’s an idea…drop a pound or two off of your body or not… chances are, you’re not going to be making the Movistar or Astana or Trek squad… 😛
Also, wider is faster… (WHAT? Uh huh. It’s been proven…so forget the 23mm at 120 to 140 psi… they are actually slower…than a 25mm or 28mm at lower volume pressures. How can this be???!!! Well, it’s contact patch my friends! The more the rubber that stays in contact with the surface, the less speed you forsake…a narrow high pressure tire on real roads (not velodromes) will bounce and you will lose speed as compared to a wider tyre with lower pressure.
So, my $15 to $20 training tyres allow me to exploit fast corners and fast downhill speeds. They LAST, they are more puncture resistant and save me money! It’s a win-win imo. I have never paid more than $25 for a tire or $50 for a set. I try to stay in the $15-$20 range per tyre and have only once experienced any issues in 13 years and that was on a CST tire. (Maxxis second tier line. A real shit load of a tyre imo). It should also be noted that many tyre companies utilize the SAME compound on their lower models but don’t tell you that! So, you get the same level of performance- grip wise in a slightly heavier BUT more reliable tyre…. Bingo! Yahtzee!
In conclusion, the Duro Hypersonic is a great tyre now matter what the price is. I’m now searching for a value priced 28mm Duro as we speak… and I just ordered a Schwalbe Lugano 28mm for $12 bucks off of eBay. Stay tuned…