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For CBS News in 1985, Charles Kuralt profiled bike messenger David Leopold.
I don’t go slow. I don’t stop for red lights. I go against traffic. I disobey every traffic law there is.
Great street footage of NYC from 40 years ago. You might think that Leopold ended up as a stain on the pavement. In 2010, CBS News did a follow-up on him:
See also Leopold on David Letterman from 1985.
A lovely little mountain biking video with some incredible locations and cinematography. The drone piloting is A+. Also available on Vimeo. (via alastair humphreys)
Meet Jackson Goldstone. He’s 6 years old, lives in British Columbia, and is already ripping it up on his bike. Here’s a video of him taking the long way around on his way to kindergarten:
Wow, if he keeps riding and improving, I wonder how good this kid could be? Ok, I’m funning you a little bit because that was several years ago and Jackson is starring in GoPro videos at the age of 10 and riding the hardest trails faster and better than many adult riders:
I mean, I think Jackson could really be world-class some da— Ha, more tricks! Jackson is actually 21 years old here in the present of 2025 and is actually now one of the best downhill mountain bikers in the world. Here’s the POV video from a recent win of his:
There are a couple of notable things about this video:
1. Watch the way he goes through a bunch of tree stumps at full tilt at ~1:10 by basically jumping over the whole thing with a couple of quick hops. Adjust the playback speed of the video to 0.5 or 0.25 to see how he does it. I’ve watched this like 10 times and it’s still bonkers.
2. And then at ~1:52, he screams through a tunnel and gaps directly onto a wooden berm — and you can hear how the crowd reacts. Here’s another view of that same gap and the rest of his run:
Other riders clear that gap too, but somehow not as big or direct as Jackson does it. I don’t actually know enough about mtn biking to know how Goldstone is doing what he’s doing, but if you want a hint, check out the “Bike Jesus” section of this video that starts at ~5:30:
3. Oh yeah, and just how ungodly fast he and the other riders are going past trees and through rocks and all sorts of other lurking assailants. Blimey.
In a piece for Vogue, Edith Zimmerman writes about trading one addiction for another: A Former Drinker Asks, Am I Addicted to Running?
And running is good. I don’t have to lie about it or hide it. It makes me happy, and it makes my life better. There are little parallels between running and drinking, though: I feel antsy, for instance, on days when I can’t run (that itch!). And I backpedal on the days I plan to rest — I’ll just go for a quick one right now and take tomorrow off instead. And I don’t understand the people — my friends — who run only once or twice a week. Why not more? Wouldn’t you want to do it every day?
Edith and I traded Insta memes this morning about running and mountain biking. I’ve been mtn biking for four years now but this year was the first time it felt urgent — every few days, I had to get out on the bike. And each time I did, I wanted to ride harder and faster and better. I pushed it so hard I almost died and didn’t ride for a month, during which period I wasn’t feeling apprehensive about getting back on the bike, I was impatient and antsy that I couldn’t. Since getting back to it, I’ve modified my approach — less aggressive, more life preserving — but the need to get out remains. I don’t know what I’m going to do this winter without it.
Adam DiCarlo takes photos of commuters (mostly bikers) as they exit the Williamsburg Bridge bike path on the Manhattan side and posts them to his Instagram account. (via @BAMstutz)
Hey folks. I crashed my bike this weekend and as such I’m a little banged up (neck & wrist injuries). I’m mostly fine but I don’t know how much desk/mouse/typing time I can manage today. I’m gonna give it a shot though because I need some distraction and something else to do besides watch TV, lay flat on my back, and listen to podcasts. If I tap out early today, now you know what’s up. ✌️
In a collaboration with Red Bull & Prada (uh, ok) and with the help of the Polish State Railways, Dawid Godziek rode a mountain bike on a ramps course on top of a moving train, performing tricks & flips between cars. The train and rider moved at the same speed in opposite directions, which made it seem as though, from the perspective of someone on the ground next to the train, that the rider is nearly horizontally stationary.
The result is trippy & counterintuitive and also a demonstration of Newton’s laws of motion & frames of reference. But since Godziek was not riding in a vacuum, there were some real world details to contend with:
We observed something interesting — the lack of air resistance. In theory, this could have made it easier, but the opposite was true. The air resistance creates a tunnel that somehow keeps me in a straight line and doesn’t allow me to shift right or left. Luckily on the recordings we had, the headwind gave me artificial air resistance, which helped me to get a feel for the flight on classic hops. On the tests, the wind was blowing weaker or in a different direction, making shooting tricks difficult. Not bad, right? We’re always complaining about air resistance, and when it wasn’t there, we found that it was impossible to fly without it.
See also Mythbusters shooting a soccer ball out of the back of a moving truck.
From British Pathé, a short film clip from 1928 of men racing on penny farthing bikes. See also clips from 1936 and 1937 races.
Most of the crowd seems to have come to see them fall off, but in the end it turns out to be such a great race that when they come round on the third lap, the excitement runs higher than the bicycle.
I watched the men’s Olympic mountain biking race last week and something one of the announcers said caught my attention. She was describing the electronic shifters the cyclists use and then said that many of the competitors were also using an AI-controlled suspension system that automagically adjusted the level of suspension according to the terrain and rider preference.
I’d never heard of this before, so I poked around a little and found some reviews of the Specialized S-Works Epic 8, a bike that comes with an adaptive suspension system called Flight Attendant (and retails for $14,500). From a review in Mountain Bike Rider:
The S-Works is the first production bike to debut with the latest version of RockShox’s Flight Attendant Ai suspension. This uses sensors in the SID Ultimate fork, SIDLuxe Ultimate shock, Quarq XX SL power crank, XX SL rear mech and XX shifters to build a comprehensive ride ‘picture’. It then automatically switch the fork and shock between open, pedal and lock modes depending on incoming impacts, bike orientation, pre-emptive shift signals and rider referencing ‘effort states’.
And from Flow Mountain Bike:
Flight Attendant is comprised of two primary components: a fork module and a rear shock module. The fork module sits atop a special Charger damper that comes inside a Pike, Lyrik or Zeb, while the shock module is built into the piggyback reservoir of a Flight Attendant-specific Super Deluxe Ultimate shock. These two modules communicate wirelessly, and decide whether the suspension should be in one of three predetermined compression settings: Open, Pedal or Lock.
The system makes these decisions based on input provided by an array of sensors. Inside the fork and shock modules you’ll find an accelerometer and an inclinometer, which allows the bike to detect both bump forces and pitch. There’s also a sensor within the crank spindle to detect if you’re pedalling or coasting.
With this combination of sensors, Flight Attendant builds a picture of the terrain and the rider’s pedalling input. Based on that picture, it automatically adjusts the suspension to the ideal setting. Put simply, it’s designed to firm up the suspension to improve pedal efficiency on the climbs and along smoother terrain, while allowing the suspension to open up for the descents and on rougher trails. And all without your hands ever having to leave the grips.
And does it work? Again from Mountain Bike Rider:
In fact I’d actually say RockShox’s claimed 1.8% faster over a 90 minute event is an underestimation for most riders. Even XC GOAT Nino Schurter found the Flight Attendant changed modes over four times more often (1,325 switches rather than 300) than he normally would with a manual lockout. That experiment also ended in the first of several World Cup wins for SID Flight Attendant prototypes in 2023 including some by Victor Koretsky on a modified version of the previous Epic Evo.
A lot of that is MTB jargon but I hope you get the jist. What I couldn’t find is any evidence that Flight Attendant or any of the similar systems are actually using AI or machine learning to assist with these adjustments. I did find this article on Pinkbike about Shimano’s plans for a suspension system that a rider can train.
Automatic control of suspension itself is nothing new. Fox Live Valve, RockShox Flight Attendant and more recently, SR Suntour’s TACT suspension products have been automatically adjusting suspension damping, with varying levels of success, for a good number of years now. However, the programming behind the function of these products is relatively fixed. There is no scope for the rider to give the system feedback on its performance. It can’t “learn” what the rider’s preferences are.
It could be that the Olympic riders are using pre-market prototypes that use machine learning to adapt to individual rider preferences, but I don’t know. I’d love to hear from folks out there if you know any more details!
Former NBA player and TV sportscaster Bill Walton died on Monday at the age of 71. He was a quirky dude and as someone who’s been known to veer off onto seemingly unrelated tangents, I appreciated his oddball broadcasting style. Basketball was good for Walton but it also ruined his body. In response, he turned to biking to keep active and to get around.
I am the luckiest guy in the world because I am alive and I can ride my bike. It is the ultimate celebration of life when you go out there and are able to do what you can do. I have not been able to play basketball for 34 years. I have not been able to walk for enjoyment or pleasure or exercise in 41 years, but I can ride my bike.
In a brief clip of a talk Walton gave (at the University of Arizona, I believe, the custodian of Biosphere 2), he elaborated on how important his bicycle was to him:
I love my bike. My bike is everything to me. My bike is my gym, my church, and my wheelchair. My bike is everything that I believe in going on in the Biosphere. It’s science, it’s technology, it’s the future, engineering, metallurgy - you name it, it’s right there in my bike. My bike is the most important and valuable thing that I have.
Walton knew: the bicycle is low-key one of humankind’s greatest inventions:
By contrast, a person on a bicycle can go three or four times faster than a pedestrian, but uses five times less energy in the process. He carries one gram of his weight over a kilometer of flat road at an expense of only 0.15 calories. The bicycle is the perfect transducer to match man’s metabolic energy to the impedance of locomotion. Equipped with this tool, a person outstrips the efficiency of not only all machines but all other animals as well.
As one of the commenters on this post said, “Tailwinds and smooth asphalt forever, buddy.”
Danny MacAskill is known ‘round these parts for his jaw-dropping trials riding (I first posted about him 15 years ago) but this ride is a little bit different. MacAskill and four friends take to the local mountain bike trails around Inverness, Scotland on ebikes and have a grand old time. For me, listening to the banter was just as entertaining as watching the riding — it’s obvious they’re just out there having a blast.
P.S. I was also trying to calculate how fast I would die if I tried riding some of that stuff and the answer is “almost immediately”. Yiiiikes.
Well, Fabio Wibmer is very, very fast on his bicycle. Just about the first trick in here is Fabio successfully jumping the Lyon 25 Stair we learned about earlier this week. And, uh, he does something we didn’t see in that other video because if you make it to the end of the video, you’ll see he starts from the set of stairs going down to the Lyon 25 instead of starting on the flat like everyone else. Sheesh.
I also like how he takes the corner/curb at :50 and the stairs at 3:20 and the stairs at 5:15. Sheesh.
Trials rider and mountain biker Danny MacAskill is one of my long-running obsessions here — I first posted about him all the way back in 2009 and if there’s ever a kottke.org konference, you’d better believe MacAskill will be performing at it. Anyway, MacAskill recently visited San Francisco with Red Bull and explored some of that beautiful city’s most iconic locations on his bike. Wow, the tennis net ride at 2:45 — BONKERS.
This video is actually a trailer of sorts for a 4-episode series that’s available on Red Bull’s site:
Watch as Danny lands a host of new tricks — some five years in the making — in spectacular spots around San Francisco. Then go behind the scenes and learn what this deeply personal edit means to him.
Super Rider (another trials rider) also did a behind-the-scenes video with MacAskill where they go in-depth on the tennis court setup.
How do you steer a bike? You turn the handlebars to the left to go left, correct? Actually, you don’t: you turn the handlebars to the right to go left…at least at first. And also? Bikes don’t even need riders to remain upright…they are designed to steer themselves.
If you’d like to play around with your own bicycle geometries, try this web app for analyzing bicycle dynamics.
Professional road racing cyclist Lachlan Morton is attempting to complete the Tour de France this year. Except: He’s doing it entirely on his own, without teammates, support vehicles, and transportation from the previous day’s finish to the next day’s start (which might be dozens or even hundreds of miles apart). That means he’ll be riding an extra 1500 miles, climbing an additional 50,000 feet in elevation, shopping for his own meals, and still trying to beat the peloton to Paris. Here’s a quick explanatory trailer:
You can follow his progress on Rapha’s site and check out updates in this Instagram Story. He’s currently ahead of the peloton, even riding day four in Birkenstocks:
Ah, but — the day three press release had an ominous note in it. Right after telling us that Morton had “picked up a tub of couscous and a couple of bags of nuts for dinner” came the real kicker: our protagonist had a bad knee, and had bought new pedals to allow a switch to flat shoes.
So on day four, Morton set off with his new pedals and covered both stage four and stage five of the actual Tour de France — in a pair of Birkenstocks. Despite his sensible sandals, Morton managed to average the same speeds as the day prior, getting through the time trial in 1:17.
(via matt)
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