Aerodynamics are an important factor in gravel racing and riding. Gravel racing speeds are high—the fastest riders in the 200-mile Unbound average 20 mph (32 km/h) across the Flint Hills of Kansas. And many gravel races can be extremely windy. Optimizing the aerodynamics of a gravel bike is important, yet...
When I was preparing my FKT ride over the notoriously rough gravel of the Oregon Outback last year, I needed to figure out what tire pressure to run. I looked at some online tire pressure calculators. One suggested to run my 54 mm-wide tires at 16 psi (1.1 bar) –...
Our bike shop partners tell us that the most asked question these days is: "Aren't wide tires slower than narrow tires?" That's what all of us believed for many decades, and old beliefs don't disappear overnight. Most of us agree that wide tires can make cycling much more fun, because...
Last week, Lael Wilcox and I rode the Oregon Outback, the 364 mile (585 km) gravel route across the length of Oregon. It was an adventure, full of beauty and challenge. Starting the ride with Lael as the full moon (with a partial eclipse) was to our side, then seeing the...
All our research shows that wide tires roll as fast or faster than narrow tires (if they use the same casing). How come that generations of cyclists believed that narrow tires are faster? The answer is simple: Narrow tires feel faster. They simulate the sensation of higher speed – without...
Why would anyone make custom derailleurs when modern electronic shifting works extremely well? It's a bit like driving a car with manual transmission even though the latest automatics are very sophisticated. It's about being involved in the operation of my bike, rather than just pushing a button. There's a joy...
Last week, we talked about how real-road tire tests have revolutionized our understanding of how bicycles work. We've looked at different ways of testing tires, and why it's so important to perform tests carefully and under realistic conditions. Today, let's look at some results of our testing. Are Wider Tires Slower?...
One of the secrets behind the performance of Rene Herse tires lies in our R&D. We run our tests under real-world conditions, so we can optimize our tires for what matters: riding on real roads. When we started our research 15 years ago, high-performance tires were narrow and designed for...
A few weeks ago, we talked about the difference between the soon-to-be-illegal 'Super Tuck' and the more stable 'Aero Tuck.' In that discussion, we touched upon the idea that a handlebar bag can act as a fairing and make the bike more aerodynamic. For years, I've noticed that I coast...
Recently, a reader asked: "Why are you so focused on saving a gram here or there? For the 99.999% of us who are not professionally racing, but just wanting to get out there and ride, shouldn't the focus be on function and longevity?" Of course, the reader is right – some...
The big news in bike racing is that the UCI wants to ban the Super Tuck position. It's a position pro racers sometimes use during fast descents, when reducing your wind resistance provides more benefit than pedaling hard. With the UCI decision, many cyclists wonder: How much benefit does the...
It used to be easy: If you wanted a fast bike, you chose a racing bike. End of story. And what made a racing bike special were first and foremost the narrow tires. Light weight was a plus, too, and so was the lower, more aero riding position. Then came the...
Product development is fun, because we get to think about bike parts, figure out how to improve them, and then test them on our adventures. This summer has seen plenty of excitement in that respect. Some of the parts we've been testing are almost ready to go into production; others...
There's a lot of talk about optimizing tire pressure these days. In years past, most of us inflated our tires to the maximum pressure rating shown on the tire sidewall. It's more complex now. Like Goldilocks, we add air and then let out some again, until we've found what seems...
These days, it's widely accepted that 700C wheels roll faster than smaller hoops. It's a bit like the old belief that narrower tires are more efficient – so self-evident that it doesn't even need explaining. After all, simple physics tells you: A bigger wheel rolls faster, because it hits bumps...
Car and motorcycle tires have been tubeless for decades, but bicycle tires have continued to use tubes. That changed during the 2010s, when first mountain bikers and then the riders of all-road and gravel bikes started to experiment with tubeless technology. They reason was simple: If you could run your...
With all the emphasis on gravel and less-than-smooth backroads, it's easy to forget the joys of pure speed as you glide over smooth pavement. And perhaps nothing is more about speed than triathlons. Few people know that both BQ team rider Mark and I did triathlons way back in the...
https://youtu.be/IOscnup4Rys If you missed yesterday's live talk on Bikepacking.com, it's now uploaded to their channel – click above to view it. It was a fun conversation with two Tour Divide racers, Lael Wilcox and moderator Neil Beltchenko, about what they want in a tire, how we're developing tires, and how we've...
We've got the new Fleecer Ridge 700C x 55 bikepacking/gravel/all-round tires in stock now. They come in the Standard, Extralight, Endurance and Endurance Plus casings. This means you can get the volume and groundbreaking tread pattern – more of that in a moment – with a full range of casings....
When we developed our first knobby tires, we wanted tires that could handle all conditions, not just mud and snow. We wanted tires that rolled fast on the road, yet offered tenacious grip when conditions got really tough. We wanted a tire for adventures where we don't know what lies...
Long distance bikepacking is all about making equipment compromises. Generally speaking, for me, bikepacking is multi-day dirt-road riding and carrying what I need along the way. Road surfaces, conditions, and weather are ever-changing— that’s part of the adventure. When setting out for a tour, I select equipment based on what...
Editor's Note: 'Gravel' means different things in different regions, from the smooth dirt roads of Vermont to the Flint Hills of Kansas. Few riders have as much experience riding and racing all over the world as Ted King. Here is how the 'King of Gravel' chooses his tires. It’s only in the...
Rene Herse tires are safe to use on hookless rims from Enve and Zipp – even when mounted tubeless (for tubeless-compatible tires). Over the last year, we've worked with the engineers from both companies to ensure the full compatibility of our tires with their rims. Tubeless tires are an emerging technology....
When we started this series to celebrate Bicycle Quarterly's 15th anniversary, we thought we'd eventually run out of myths. But it seems that new ones are created as fast as we can debunk old ones. The latest is "700C wheels roll faster than 650B." This is stated with the same certitude...
The euphoria about gravel bikes is hitting a snag: Many riders feel that their gravel bikes are slower than their road bikes. For example, James Huang, the technical expert from CyclingTips.com, posted: "I've been spending too much time on gravel and mountain bikes lately. Good to be reminded what real speed...
Before I started the 750-mile (1200 km) Paris-Brest-Paris on a brand-new bike, I thought about the tools I needed to bring. After months of training and the expense of traveling to France, it would be a shame not to finish the ride because of a mechanical. I love the feel of...
During the summer solstice, Ryan Francesconi led a group of 14 friends on a truly amazing adventure: We took the train to Klamath Falls on the border between Oregon and California and then rode back to Portland on forest roads and trails traversing the Oregon Cascades. It was a 2-day,...
Our series of 'Myths in Cycling' continues with a look at rim width. You often hear that wider tires should run on wider rims. Intuitively, that seems to make sense – match the wider tire to a wider rim. You also hear that wider rims make the tire handle more...
With wide tires, you can tune the ride of your bike to the terrain and to your personal preferences. This gives you options that simply did not exist in the past. Gone are the days when we inflated our narrow tires to the maximum pressure and rode on rock-hard rubber. Even...
Every BQ test bike that arrives at our office is greeted with enthusiasm. When OPEN hinted that they had a revolutionary, top secret, new bike they wanted us to try, we were even more excited than usual. Until now, we've had to keep the new bike under tight wraps, but...
It's hard to believe that the first Oregon Outback, that incredible 363-mile gravel race, was just five years ago. It's almost like we live in a different world now, so much has changed... Back then, the idea of running a race that traversed the entire state of Oregon from south to north...
As part of our series on myths in cycling, let's look at wheel size and how it affects speed. Even though all-road tires have grown wider in recent years, many bike makers have stuck with 700C wheels. It's a size that is familiar to road cyclists, and there is also...
This used to be one of the first things you learned as a cyclist: If you want to go fast, make sure your tires are pumped up to the maximum pressure. The harder your tires are inflated, the faster they roll. We now know that this is not true. The realization...
Winter riding is fun. The crisp air, the clear skies and the beautiful views. Getting out and breathing fresh air. There are many reasons to enjoy it. Winter riding requires preparation. The most obvious is clothing – which we'll leave for another post. Today, let's talk about what makes a good...
[youtube https://youtu.be/MBUSuXHhsBQ?rel=0&w=640&h=360] How do you test a bike like Mitch Pryor's latest MAP All-Road? With its 48 mm-wide tires, fenders, racks and full lights, this is a bike designed for epic rides. How about taking it on a 30-hour, non-stop ride that traverses four mountain passes and crosses the crest of...
'Marginal gains' are the latest buzzword in cycling. The idea is that many tiny improvements can add up to make a meaningful difference. Make 10 changes that each save 3 Watts, and you'll have gained 30 Watts... Think of Greg LeMond winning the 1989 Tour de France by eight seconds... If...
Glancing at the photo above, you might think that I am turning right (seen from the rider's view). Actually, I am beginning a left turn. What you see is countersteering – literally the only way we can lean a bike into a corner. (more…)
This year's Tour de France has had its share of drama, and the winner won't be the one most observers predicted. Among the sporting achievements, the technological innovation was easy to overlook: Finally, the UCI approved disc brakes, and the Tour is the first big stage race where they've been used. Reading the...
Our ideas of what is a performance bike have changed a lot in recent years! The most exciting bikes of the moment are bikes like the Open U.P. – a carbon race bike that accepts 50 mm-wide tires! Not too long ago, every performance road bike had 700C x 23 mm...
At Compass, we see little point in replicating what you already can buy from others. When we made our first knobby tires, we wanted true dual-purpose tires. Could the new knobbies match the on-pavement of good road tires, yet grip as well in mud as true cyclocross tires. Impossible? You'll...
To celebrate Bicycle Quarterly‘s 15th anniversary, we are looking at myths in cycling: things we used to believe, but which we’ve since found out not to be true. Today, we explain why your bike's weight distribution does not directly translate into your tire pressures. (more…)
When we first started talking about shock absorption and fork blades, it was commonly believed that fork blades didn't flex significantly. Experts told us: "All the flex in a fork is in the steerer tube, where the lever arm is longest." And yet, when we rode bikes with flexible fork...
In the 15 years of Bicycle Quarterly, one of our discoveries has been that testing bicycle performance isn't easy, and that taking shortcuts often has led to erroneous conclusions. Carefully designed tests that replicate what happens when real cyclists ride on real roads have allowed Bicycle Quarterly to debunk several myths. Certainly,...
To celebrate Bicycle Quarterly's 15th anniversary, we are looking at myths in cycling – things we all used to believe, but which we've since found out not to be true. During these 15 years we've learned a lot, and perhaps the most intriguing discovery is that modern parts aren't as light as...
When tubeless tires first became available, they were designed for mountain bikes, and it was their resistance to pinch flats (above) that made them popular. Off-road, there are few nails or broken bottles that can cause punctures (and even those usually will be pushed into the soft ground rather than...
To celebrate 15 years of Bicycle Quarterly, we are examining myths in cycling – things that we (and most others) used to believe, but which we have found to be not true. Today, let's look at tire tread: Tread patterns matter – they can make a difference – even on the...
"Raise your handlebars, and you'll be more comfortable." It's one of those almost self-evident 'truths' of cycling. And yet the reality is not that simple... (more…)
To celebrate 15 years of Bicycle Quarterly, we are examining myths in cycling – things we (and most others) used to believe, but which we have found to be not true. Today, we'll look at frame stiffness. (more…)
To celebrate 15 years of Bicycle Quarterly, we are looking at ‘Myths in Cycling’ – things that aren't quite what we (and most other cyclists) used to believe. Part 3 of the series is about fenders. Many cyclists here in Seattle install fenders when the rainy season starts, and remove them for...
In part 2 of our series 'Myths in Cycling,' we'll look at why titanium isn't always lighter than steel. I can hear you saying, "What? Everybody knows that titanium has half the density of steel." That much is true: The same part made from titanium will weigh half as much as the...
When we started to publish Bicycle Quarterly 15 years ago, it seemed that most of the technical aspects of bicycles were well-known. And yet, as we tested many different bikes, we started to question many of the things we had accepted as 'facts.' To celebrate our 15th anniversary, we’ll look...
We aren't models! Anybody who has looked at our photos will have noticed this... but what I really want to say is that every photo you see in Bicycle Quarterly, on this blog and on the Compass web site is totally authentic. It's not a posed shot with – yes...
Quite a few people were surprised at the 2017 Concours de Machines when Peter Weigle's bike was the lightest by a big margin. With a steel frame and mostly metal components, the Weigle weighed just 9.1 kg (20.0 lb) fully equipped with wide tires, fenders, lights, a rack, even a pump...
Last weekend was the first cyclocross race in Seattle. Almost every year, the first race catches me by surprise. Summer is over? It's 'cross season already? Usually, I oil the chain on my trusty Alan 'cross bike and head to the races. This year, the Alan's tubular tires needed regluing. The...
Jan's comment: It's always interesting to read others' impressions of our work. Cyclodonia discussed several bikes from the Concours de Machines in detail. Translated and reposted with permission. The French original is available here. The views expressed are those of the original author, not mine. Enjoy! J. P. Weigle (Lyme –...
Long-time Bicycle Quarterly reader Matt Surch (above) put his name on the map when he won last year's Steaming Nostril gravel race on Compass Bon Jon Pass tires. We checked back in with him to see how the tires performed in the year since then, and to hear about his road racing...
The official results of the 2017 Concours de Machines are in! Peter Weigle's bike did even better than we thought: Lightest bike: First place Choice of the jury: First place Technical points (bonus for features, penalties for problems): First place Zero penalties for technical problems Faster than required speed on each...
In past decades, there was little doubt about what made a "road" bike: narrow tires, drop handlebars, no fenders. Then randonneur bikes were re-introduced into cycling's mainstream, leading to some confusion. "That is a touring bike," said many. "It has a rack and fenders." But the performance of the randonneur bike is...
The 2017 Concours de Machines in Ambert (France) was a great success for everybody involved. The bikes were amazing – and much-improved over last year's machines – the routes were truly challenging, and most of all, the spirit among all participants was wonderful. The goal was to find the best "light randonneur bike",...
In this year's Concours de Machines technical trials, I am riding J. P. Weigle's entry (above). The Concours is a competition for the best 'light randonneur bicycle.' The rules stress light weight, reliability and innovation. Bikes must be fully equipped with lights and the ability to carry luggage, plus a pump and a bell....
Next weekend, the Concours de Machines (Technical Trials) will be held in Ambert, France. The Concours is a competition between bikes, not riders, with the goal to find the best "light randonneur bike". Bikes will be weighed, judged on their features, and then sent on a challenging course over three days to...
We've experienced a profound revolution in road bikes in recent years: It used to be that to go fast, you rode narrow tires and pumped them up to the maximum pressure. If you wanted more comfort, you used wider tires and (maybe) lower pressures, but you knew that you'd be...
In recent months, I've been traveling and testing so many bikes for Bicycle Quarterly that I my "main" bike, the René Herse, hasn't seen much use. But now the Summer BQ is out, and I am back on my favorite bike. We built it six years ago as a prototype...
"I no longer believe that the ultimate rigidity defines the ultimate bike!" That revolutionary statement came from Damon Rinard, Road Engineering Manager at Cannondale, in a recent Cyclingtips.com podcast on frame stiffness and "planing". For many decades, stiffer frames were thought to perform better. Frame flex was equated with wasted energy....
It's always interesting when bike industry people talk among each other, off-the-record. On the ride from the airport to Paul Camp a few weeks ago, one bike tester was still visibly shaken when he related: "My tubeless tire blew off the rim yesterday. I almost crashed." Worried that this might have been...
Disc brakes have become increasingly popular on bicycles in recent years, especially on all-road bikes with wide tires. Bicycle Quarterly has tested more than 20 bikes with disc brakes. Our challenging adventures have provided excellent opportunities to learn about the advantages and disadvantages of modern 'road' disc brakes. I remember enjoying...
We thoroughly test every Compass product before we release it. We also seek unbiased evaluations from experienced riders who weren't involved in the development of the products. For the new Compass Steilacoom cyclocross tires, we gave them to a number of cyclocross and gravel racers. Two of them have reported...
Bicycle Quarterly hasn't really covered recumbents much. It's not that we aren't interested, it just seems difficult to do such totally different machines justice. And yet recumbents are a perfect fit with Bicycle Quarterly's research into the history of cyclotouring. During the mid-1930s, recumbents were quite popular among French cyclotourists. Many saw...
Congratulations to Andreas Behrens of LaFraise Cycles for completing the amazing Transcontinental Race. Riding unsupported for almost 2,400 miles (3900 km) over a course that traversed all of Europe, Andreas completed the non-stop race in 15 days and 12 hours. The course traversed the highest mountain ranges of Europe – above the view...
The Firefly we tested for the Summer Bicycle Quarterly is one of a new breed – an Enduro Allroad Bike with tires much wider than we usually ride. Our usual routes in the Cascades didn't seem enough of a challenge for this machine and its 54 mm tires, so we took...
Over the last few years, the idea that higher pressures don't make your bike faster finally has become accepted. Many cyclists now run lower pressures to improve comfort and traction, without giving up anything in speed. On gravel, lower pressures actually make you faster, since the bike bounces less. On soft...
"Buy the nicest, most supple tires you can afford; and buy them in the widest width that you can fit in your frame." That is Joshua Poertner's summary of a panel discussion on Cyclingtips.com. Joshua used to be the president of Zipp, the makers of super-fast aero wheels, and he did a lot of...
How does it work that wide tires are as fast as narrow ones? It is really simple: Comfort = Speed When your bike vibrates, energy is dissipated as friction. That energy must come from somewhere – it no longer is available to propel the bike forward, so your bike slows down. That is why your...
This summer saw the first Technical Trials in France since 1949. Then as now, the goal was to find the best "light randonneur" bike. Organized by Christophe Courbou, the magazine 200, and Victoire Cycles, this year's event was a great success. The original Technical Trials of the 1930s and 1940s brought incredible progress...
During a recent cyclotouring trip in Japan, we stopped at an onsen hot bath. As we locked up our bikes, I noticed an interesting touring bike, chained to a lamppost. "A few decades ago, a bike like this was every boy's dream," my friends remarked. Looking over the bike, I can understand why. It's a smartly...
Recently, Bicycle Quarterly's experiments on suspension losses have been replicated and confirmed: Higher tire pressures don't result in faster speeds – even on smooth pavement. Replicating results is a crucial part of science, which makes the new results an important milestone in the understanding of bicycle performance. No longer is it just Bicycle...
Where is the best place to test an Enduro Allroad bike? That is what we asked ourselves as we planned the Summer 2016 Bicycle Quarterly. It had to be a ride that went beyond the capabilities of the Allroad bikes we usually ride, with their 42 mm-wide tires. And yet we...
When the Australian Matt Hayman won the European Paris-Roubaix race yesterday, it came as a huge surprise to everybody, including Hayman himself. However, nobody was surprised that Hayman rode on super-supple tires. With their tan sidewalls, Hayman's tires looked like FMBs or Dugasts, but first reports insist that they actually were made...
Straddle cables provide a light and elegant way of transferring the brake force: Every cable-actuated rim brake needs to transmit the force of the single brake cable onto two brake pads that squeeze the rim. In recent years, straddle cables been replaced by direct-action V-brakes or complex linkages (on modern Shimano sidepull brakes). There...
Gravel riding is becoming increasingly popular, and we are very happy about it! It was natural for Bicycle Quarterly to become a co-sponsor of the Eroica California ride in April, since it combines two things we love: gravel roads and classic bikes. But gravel riding isn't limited to riders trying...
What is the 'correct' tire pressure for your bike? The simple answer is: Whatever feels right to you. Confused? Here is how it works: In the past, many riders inflated their tires to the maximum pressure rating. Now most cyclists now recognize that the optimum pressure often is much lower. But what is the right tire...
Recently, I posted about slick tires and why they tend to offer poor traction, especially in the wet. Almost predictably, some Internet "experts" declared that it was all wrong. One of the more polite comments was: "Wow, lots of misinformation in this article." I guess it's normal: If your research is breaking new ground,...
In our last post, readers noticed the image above and asked about cornering. How am I able to lean the bike so far? Wider bicycle tires corner better than narrower ones. This may run counter to what many cyclists believe, but it's easy to explain. The reason is the lower pressure...
When I test bikes for Bicycle Quarterly, I treat them like my own bike. I ride them for several weeks, often exclusively so I get used to the bike and get attuned to its peculiarities. Features that were unfamiliar at first soon become second nature. And conversely, minor issues may become significantly annoying...
It's a common dilemma: You want to ride to the start of a cyclocross race. The distance of 20 miles to the start doesn't bother you – it's a good warm-up. But your expensive cross tubulars will wear off their knobs quickly if you ride them on pavement. What to do? One solution is equip...
The bike above is the icon of my youth – a 1980s Cinelli Supercorsa with Campagnolo Super Record components. Back then, I was riding a crummy Peugeot 10-speed with heavy tires, rattling fenders and poorly-shifting derailleurs, and I dreamt of a lithe racing bike. When I finally was able to afford one...
We sometimes get the question whether there is a weight limit for Compass tires or components. The answer is "No". That doesn't mean that our components are indestructible. It's just that we have found rider weight to be a poor predictor of component failure. Neither is power output. Heavy and strong...
Our very first Enduro Allroad prototype tires started out as knobbies with supple casings – then we had the knobs shaved off by Peter Weigle. We wanted to test the concept of a very wide, supple tire before committing to expensive tire molds. We were happy to report that the...
A while back, another magazine published a list of the "10 Most Important Innovations in Cycling". The list included things like electronic shifting and Lycra, but left out pneumatic tires... This got us thinking: What are the ten most important innovations in cycling? To keep things straightforward, we'll start after the...
When bikes are as stunningly beautiful as the machines from René Herse, Alex Singer and other French constructeurs, it is easy to dismiss them as "beauty queens" or "show bikes." This would be a mistake: The performance of these bikes is as outstanding as their appearance. They confirm the old...
At Compass Bicycles, we think a lot about manufacturing. We know what we want to make, but how should we make it, and where? We are not looking for the lowest cost, but for the highest quality. The conditions under which our products are made are an important consideration as...
A little while ago, I wrote about how new scientific research has allowed us to design wide, supple tires that offer the speed of narrow, high-end racing tires. The key finding is that above a certain threshold, increasing tire pressure no longer results in lower rolling resistance. While these new...
Of all our research on tires, the most revolutionary finding is this: Tire pressure has almost no effect on a tire's speed. We did not believe it at first, either, so we've tested it numerous times. It's been confirmed numerous times, with different methodologies. The real revolution is not how you...
We discussed "planing" in a recent post by looking at power data from a double-blind test of two different bikes. (If you haven't read that post, we suggest you start reading there.) The data showed that the same rider's power output was consistently higher on a bike with a more...
Can a 650B randonneur bike climb as well as the best titanium racing bikes? It did climb as well in a Bicycle Quarterly test, and that raised a few eyebrows. After all, the randonneur bike weighed 10 pounds more... Theoretically, assuming equal power output on each bike, the lighter bike will...
Testing bicycles may sound like a dream job – you get to ride all kinds of bicycles without having to pay for them – but it comes with risks. We ride the bikes hard, although we don't abuse them. We are smooth riders, so we don't stress components unduly. Even...
When I was a kid, I loved cars. My first question to any owner of a sports car was: "What'll she do?" I approach bikes similarly – I care about how they ride first and foremost. Some cyclists these days seem to be concerned what their bike is, not what it...
Improving your tires can make the biggest impact in the speed of your bike (apart from changing the motor!). The difference is especially pronounced for slower riders, whose wind resistance is less than that of faster riders. Most cyclists know that supple tires make you faster on your bike. But so...
I had the opportunity to ride a favorite classic René Herse again recently. This is the bike that started the current trend of 650B bikes in North America. It's the bike that made us re-evaluate front-end geometries and wide tires. It's truly the ancestor of the bikes we ride today,...
"You don't want to give people what they want. Give them something they didn't know that they wanted." Ruth Reichl, former editor of Gourmet. This quote really resonated with me. When I pick up other cycling magazines, I am often disappointed. They talk about the trends of the moment. Right now I'm...
