Da ich aber immer wieder zu meinem Erfahrungen mit Reifen von René Herse (ehemals Compass) gefragt werde, hier meine Antwort: Leider geil! Due to the difference in sizes, it’s definitely a softer ride compared to the Bontrager R3. Granted, because of the larger circumference with a 38mm tire, they’re likely to roll faster than a 32mm tire. The reason is that the 25mm simply can't respond to the terrain as well as the 42mm one. Tour's test protocol also ignores the . I'm looking at the Barlow Pass for my gravel bike which sees mostly asphalt and hard packed caliche. Rene Herse Cycles' first bikepacking-specific tire, the 29" x 2.2" Fleecer Ridge, was designed in collaboration with Lael Wilcox for rides such as the Tour D. Being that I rode on the Pathfinder Pro on a 60+ mile road ride, I started to consider the idea of going with a tire wider than just 32mm. Thank you to Enve for the loan of several Enve 45 wheelsets that were used for these tests. Not uncommon for a new tire to loose a bit of pressure for a week or so while the sealant works its way into the tire. More seriously, let’s look at the pros and cons of some popular testing methods. And yet on real roads, running your tires softer doesn’t slow you down. Der René Herse Steilacoom TC ist ein wahnsinnig guter Allrounder fürs Gravel-Bike. For this round, we only tested tires that are relatively supple – in our previous tests, we included stiffer tires and found even bigger differences. You have to be somewhat crazy to do this, but it’s the only way. The Terreno Zero still felt too aggressive to me. In conclusion: On smooth roads, wide tires are as fast as narrow ones. All tests are only as good as their research methodology. (Otherwise, you’d need a very, very long hill.) When we started our research 15 years ago, high-performance tires were narrow and designed for high pressures – because that’s what makes tires fast in lab tests. Now, if it's speed you're after, well...guess that really depends. $#@&! This is the graph everybody wants to see – showing the performance of the actual tires you can buy. Rene Herse talks a bit about this on a post titled How to Choose Your Rene Herse Tires. Today, a trail heads up the pass, with spectacular views as you traverse the old . Fixed the hole when I made it home but the damage was done to my confidence in these tires. Even pros no longer run their tires at 8 bar (120 psi)… If test results don’t replicate the real world, something is wrong. Bei 35 psi misst er darauf 39 mm, also nur 1 mm mehr als die technische Angabe. These tests were performed on smooth pavement – the most favorable surface for narrow tires. The problem is that we also have to deal with many other variables, especially wind, temperature and rider position. For the same reason, low pressures make a tire much slower on a steel drum – the drum presses deeply into the softer tire. For you, it might be a Bon Jon Pass, maybe something even wider, or something narrower. After this, I'll be testing out the Tufo Thunderos in 40mm, which seem to be much better suited to the gravel roads of southern AZ over the Barlow Pass tires. ), Latex tubes make a big difference. (Let’s assume you’re already riding a performance bike with a relatively inclined position and wear close-fitting clothing.). Every week, we bring you stories of great rides, new products, and fascinating tech. How precious. One is well-known, the other is often overlooked. Added a couple of ounces of sealant in each tire, inflated them to max PSI, rotated and bounced them, and then deflated them to a reasonable pressure for a test ride. Ist es aber nicht: Sie sind im besten Sinne des Wortes All-Road -Reifen. In our tests, we ride up and down the road with each new tire setup before we start testing. Very small differences may be undetectable because testers run out of time before conditions change. They are quite pricey, I was also looking at the WTB Exposure ? To put these results in context, we calculated the speeds for each tire with a power output of 150 watts. That’s why our real-road tire tests were so ground-breaking. This website uses cookies where necessary to enhance your experience. By using a real road, a real bike and a real rider, we are making sure that the system’s three most important parts are present. Handling in turns still felt firm and grabby. The same tires were fast and slow in both tests; high pressures didn’t make the tires faster, etc. And we don’t have to worry about the variability that is inherent in power meters. Full review at: https://www.bicyclerollingresistance.com/cx-gravel-reviews/rene-herse-barlow-passRolling resistance test of a Rene Herse Barlow Pass CX/Grave. A statistical analysis is standard scientific practice – it allows figuring out which differences between measurements are real, and which are just ‘noise’ in the data. One reviewer referred to them as “butter slathering goddesses”. What I found was both a happy accident and what will likely be the best road tires I’ve ever owned: the Rene Herse Barlow Pass TC tire. For testing with a power meter, we need a perfectly flat course. LOL. . The best materials are expensive. Need to take some time to look at all the ones you mentioned. )— and not simply due to random noise. Natürlich ist der René Herse Steilacoom TC auf Asphalt nicht der Schnellste, aber der Rollwiderstand ist dennoch angenehm gering, wenn man das vergleichsweise aggressive Profil und die Offroad-Performance berücksichtigt. Announcements Commentary As a percentage of speed, the differences get smaller at higher speeds – aerodynamics make up a larger portion of the resistance. Above is data from higher speeds (29 km/h; 18 mph) that confirm: Even at speeds where aerodynamics become an important factor, 44 mm-wide tires are no slower than 28s. Reviews Removing the thin rubber membrane of the tube should make the tire faster, but adding liquid sealant increases resistance and slows it down. :D. As for your question...yes, you can absolutely use tubes with any of the Rene Herse tires. Speaking of PSI, I checked the tire pressure some hours later after returning from my ride. A solution is to make the drum very large, but this gets very expensive – and you’re still not measuring the suspension losses. It still needs to be predominately a road tire but still be capable of handling some gravel. Other factors are much more important (see below). In fact, misconceptions about tire performance have persisted for so long because testing tires is so difficult. Another way to increase our confidence in the results was running more tests with different methodologies. So that brings us back to real-road testing. The rubber is quite soft. Like Rene Herse says on their website, it’s the Goldilocks of tires: not to wide, not too narrow...just right! Published: 2022-11-18 | Jarno Bierman. So would opt for the 38 or the 44 rene herse tyre? Die neuen Reifen gibt es bei uns direkt an der Ladentheke.Mehr Infos zum Reifendruck:https://axs.sram.com/guides/tire/pressureNach und nach werden wir hier u. Der René Herse Steilacoom TC ist mit 38 mm das dünnste Modell fürs 700C-Rad. That’s the simple part. You start off by picking the tire size (700c, 650b, or 26”), choose the style and width, and then chose a casing. It’s good to know that no matter which Rene Herse tires you choose, it’s hard to go wrong. The technical term for this is ‘suspension losses’ (sometimes also called ‘vibration losses’). This means that more test runs are required to detect small differences between tires. After riding on them, I certainly understand what he means by that. We can feel this effect: When we stop pedaling, the rollers quickly stop, whereas we coast for a long time on a real road. Warm rubber is softer than cold rubber, and temperature has a significant effect on how fast tires roll. Let’s assume our rider is a really strong racer and puts out 400 watt – which means they ride at about 25 mph (40 km/h). TOUR measures how long the pendulum swings, and from that they calculate the energy consumed by the tire (and hence the rolling resistance). Above is one of many tests where we compared tires with the same casings (Rene Herse Extralights) in different widths - the numbers show the time it took to roll through the timed section of our 132 m-long test hill. The Rene Herse Barlow Pass tyre is a tubeless-compatible (TC), ultra-supple tyre that delivers an astonishingly smooth and grippy ride. All this data is interesting, but let’s not forget why we test tires and obsess over supple casings: Great tires make riding so much more fun. The Oregon Outback Rene Herse: Method or Madness. The pendulum moves at low speed, so wind resistance isn’t a major factor. You have basically no braking traction as the speed increases. Almost immediately I noticed a difference in the speed. But after reading up on the differences, I decided to keep them and mount them onto my bike. The interesting thing about Rene Herse tires is that they’re all pretty much the same. The cons of this tire is cornering and/or off-camber grip on gravel (there basically is none), and steeper descents on gravel, particularly looser/chunkier terrain. We’ve tested this for our Rene Herse tires, but it’s probably true for other tires, too. WTB Byway 700x34 Tire This led me to looking at the Victoria Terreno Zero, a tire designed for cyclocross and gravel. Always keep your pressure high enough that your tire doesn’t collapse under hard cornering or braking (a clear sign that you are getting into the too-low/slow pressure range). Other than that, installation went super smooth. I didn’t want a 32mm tire but wasn’t sure if I wanted to go with a 38mm tire. This website uses cookies where necessary to enhance your experience. Before we continue, I want to say that I’m not entirely comfortable sharing our data that shows our tires being fastest. The Rat Trap Pass 26″ x 2.3″ - actual width is 52-54 mm depending on casing type and rim width - has been a personal favorite. If your bike can't fit them, maybe you need a new bike. Interesting though. Real-road tests require a huge amount of effort – not in equipment, but in time. I first learned about the Compass Tire / René Herse brand when I was just a reader of Road Bike Rider. Unless you ride on very smooth roads all the time, low pressures are going to be faster, until you reach the point where the tire becomes wobbly and really slows down. Here's a spy shot of a chainring marked '40S.'. However, it wasn’t clear to me how supple this tire would be compared to the R3. Apart from the fact that we don’t have a rider, so we can’t measure suspension losses, steel drums have another problem: They are convex, so they press deeper into the tire than a flat road (left). About the only thing I could see doing is going down even a bit more on the PSI of the tires. If there’s a difference between these tires at moderate and high speeds, it’s extremely small – too small to matter even for competitive cyclists. If you're primarily riding on asphalt with a good amount of hard pack gravel roads, I don't think you can go wrong with a 44c. Super comfy but still pretty fast. The difference between the fastest and the slowest smooth tires is 1.3 km/h (0.8 mph) – or about 5% of the bike’s speed. I’m a heavy strong rider (100kg) so they were not right for me. In Seattle, we test during the summer months, because that’s when it’s often calm. Keep riding! I just think the Rene Herse tires provide a nicer ride. Why performance is important for slow riders, too. What about the wind resistance of wider tires? The centerline tread is where it really helps I think. (In any case, there is always some variation between tires of the same model due to the tolerances of manufacturing.). With wide tires, there are fewer compromises than in the past: supple tires are both fast and comfortable, and thanks to their low pressures, they also don’t get a lot of flats. At 10 psi, the tires are almost unrideable – and finally a lot slower, too. René Herse tyres are probably the best tires for gravel and all-road bicycles, and even road bicycles. That’s one of the things that these tires bring: a simple joy of riding. Rene Herse basically took the few styles of tires they knew they could do well and simply applied them across different wheel and tire sizes. It shows we’ve been successful in reducing the noise in our data. Tests must be performed carefullyRunning the same tire multiple times is essential, since it’s the only way to determine how reliable our data is. (In cars, the same losses occur mostly in the shock absorbers.) Go as wide as your bike can handle. description of our testing methods is here, Results of Bicycle Quarterly's tire tests, Why 700C wheels don't roll faster than 650B, Why Rene Herse doesn't offer semi-slicks with shoulder knobs. Gewicht: 457/443 g The only tire that is softer is the WTB Horizon tires I own. The myth he's busting is that smaller tires are faster than wider ones. Zusammen mit dem nicht richtungsgebundenen Profil lässt es sich so nach Belieben auf der linken oder rechten Seite positionieren, je nachdem ob ihr es auf dem Foto haben wollt oder nicht. So you’ll want to equalize the weight of the tires by adding weight to the rims. I considered the endurance casing but felt like it might be a bit too much for the kind of riding I do. Well, almost: We’ve often dreamed of buying an old railroad tunnel, outfit it with different surfaces from smooth pavement to rough gravel, and test there, with no wind and constant temperature. (We checked just in case…) But what if we find out that one tire is 1% slower than the other? Should have double-checked the order! Nobody can claim that it’s impossible to maintain the same position or that wind affected our results: The statistical analysis shows that these factors were controlled, and that we can reliably detect differences between tires. What we experience as discomfort is actually friction between the tissues of our bodies. This is also why supple casings offer such a huge performance benefit: They reduce the hysteresis losses in the tire – imagine squeezing a soft foam ball instead of a hard tennis ball – and they absorb vibrations better, so they reduce the suspension losses, too. The power required to spin the drum empty is measured, then a wheel with a tire is added to the setup. We usually test just before sunrise, when there’s the least amount of air movement. If our results are statistically significant and replicable (meaning that you get the same results when you run the same test again), this also means that critics won’t be able to argue that our testing is flawed. One part of the road was all torn up and reduced to dirt. They really hold their shape and they’re fast on all surfaces except mud of course. The rider must be able to maintain the same position for dozens or hundreds of test runs. Been fighting Chrons since 16. Generally, the Extralight is good for speed and comfort due to their extra suppleness. The answer is simple: ‘Neither.’ Above is one of many tests where we compared tires with the same casings (Rene Herse Extralights) in different widths – the numbers show the time it took to roll through the timed section of our 132 m-long test hill. I would say from 38mm they are very . I love riding on my WTB Horizon tires. Jeff enjoys participating in various road and gravel cycling events. Energy absorbed in the tire as it flexes (hysteresis losses)As the tire rotates, it flattens at the bottom. That's actually my first set of gravel tires I bought. The challenge is in setting up and conducting the test: Selecting a well-suited road – most don’t have a uniform gradient. Wenn wir sie getestet haben, werden wir euch umgehend davon berichten! So, I ordered a set and waited for them to arrive. Especially Extralight vs Endurance related to riding surface. While the vast majority of the ride was on concrete and asphalt, there were a few areas here and there where the terrain was either rough or covered in loose gravel and/or dirt. Recently I was running the WTB Horizons 47mm on 650b wheels, but I found that they didn’t hold their structure well even at 60psi and I was always down on the side knobs on smooth tracks / road. These are not the only René Herse tires that I own, by the way. A tire that’s optimized for a lab test is going to be different from a tire that’s optimized by testing in the real world, on real roads, with a real bike and real rider. You wouldn’t want to ride 54 mm tires if 25s would get you to the finish six minutes faster – or vice versa! The tiny differences between 28, 32, 35 and 44 mm-wide tires are not statistically significant – they are the inevitable ‘noise’ that you get with all tests. All test runs are within 0.51 seconds of each other. We like to keep our parts backward- and forward-compatible. The biggest is that the knobs of the Rene Herse tires are so big that they don’t squirm signficantly. Rene Herse Cycles makes high-performance tires, handlebars and other components for road, all-road and gravel bikes. The hill shouldn’t be too steep: Your test shouldn’t be too fast, otherwise, you’re mostly measuring aerodynamics, and small changes in rider position will affect your results more than your tires. I bet the 44c version is thinner to allow for more suppleness. That said, consider using the Endurance casing that Rene Herse offers. I prefer tires that fit nice and snug to the rim. Wie so oft hat so viel Gutes leider seinen Preis – hier ist jedoch jeder Cent gut investiert. It’s more important than almost any other change you can make on your bike. The buttery, comfy goodness of the Barlow Pass tires continued to deliver all the way through the ride. The raw casings are fragile until they are vulcanized (baked) into a tire, so they must be handled carefully, by skilled workers. ;). I too purchased and loved the ride quality on the Barlow Pass with standard casing. Exercise is the beast that defeats/keeps it at bay. top Performance und viel Grip in wirklich allen Lagen. Shame the tires can’t hold up better because the ride quality is superb. In the photo above, Ted King is running Rene Herse 42 mm knobbies with Endurance casings, while I’m on 54 mm smooth Extralights. Von den Dimensionen her harmoniert der Reifen sehr gut mit den knapp 22 mm Innenweite der Felgen. When did somebody suggest that a wider down tube slows your bike down significantly? $ 74.00 - $ 98.00. These losses can be very high. I haven't had any punctures yet on the Barlows and have gone over some pretty rocky stuff. ), Our testing confirmed what professional racers have known for decades: A supple casing is the most important component to make a tire comfortable and fast. Above is a comparison of our knobby Steilacoom and our smooth Barlow Pass, both in the 700C x 38 size and with Endurance casings, at a speed of roughly 29 km/h (19 mph; individual runs shown). • How our real-road tire tests work• Ted King’s Water Cooler Talk about tires with Lael Wilcox and Jan as guests.• How to pick your Rene Herse tires? We always cringe when somebody reports that “x is 0.78% faster/slower than y” without a statistical analysis. I was certainly intrigued but wasn’t sure if I wanted to go with a 38mm tire. This takes energy – imagine squeezing a tennis ball. Running tires on a steel drum provides a decent simulation of the forces that wear them out, and it can speed up testing compared to riding tires on real roads. My favourite slick Gravel tyres so far are Maxxis Re-Fuse 650b x 50mm. Test Set up and Conditions Size, Weight, Thickness Measurements Rolling Resistance Test Results Puncture Resistance Test Results Static Wet Grip Test Results Conclusion The Rene Herse (and formerly Compass) tires have always been available in several different casing designs like the Extra Light, Standard, Endurance, and Endurance Plus casings. I had a set of WTB Riddlers which are nice for gravel...but wanted the 650b to be more of a gravel-based wheelset. If the tire is 0.1% faster, we cannot detect this, but it doesn’t matter: It won’t change how we ride. Whether you ride them as high as 40 psi or as low as 30 makes no real difference. It’s not really feasible for a big tire company to wait six months, then send their engineers to a hill at 5 a.m., finally ready to test, only to return to the office empty-handed because a very light wind has sprung up. If it can take up to a 45" tire then technically the 44 should work. The road surface is flat, so there’s none of the pressing into the tires that you get with convex drums or rollers. Finding a day with constant conditions – we check the weather forecast, and we’re prepared to cancel our test session if even the slightest air movement springs up. The Firefly has seen a lot of testing duty lately. When all these requirements are met, tires can be tested reliably on real roads. Test sectors that require significant braking on . The question of optimum tire pressure is both simple and complex. For example, it’s doesn’t come as a surprise that the difference between the 44 mm and 28 mm tires above (0.04 seconds or 0.3%) is not statistically significant. I simply sank into the experience and enjoyed my ride. The centerline of the Horizon is smooth but with a couple of channels separating the centerline from the treaded area of the tire. If one tire is 1% faster than another, we want to detect this. All that has a price, but we feel its worth the effort: A great, supple tire transforms the feel and performance of your bike more than any other component. (These reference tires need to be carefully stored between tests, so they don’t change their properties.). We’ve used tests at the velodrome to validate the results of our roll-down tests (below).
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