Coleman McCormick

Archive of posts with tag 'Cycling'

PogaÄŤar's Climb

September 20, 2020 • #

You don’t have to be an avid cycling fan to be impressed with Tadej Pogačar’s incredible time trial on stage 20 of this year’s Tour de France. He bested the 2nd and 3rd place riders by a full minute, 1:21 better than 150 other riders. Absolutely unbelievable.

His countryman PrimoĹľ RogliÄŤ (a heavy favorite for the overall weeks before the Tour) had nearly a minute on him in the yellow jersey, going into a long TT ending with a climbing finish on La Planche de Belles Filles.

I just wonder how much different the Tour results would look if this TT was stage 3 instead of 20.

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The Best of The Blue Train: 2001 L'Alpe d'Huez

July 19, 2020 • #

With this year’s Tour de France delayed (as of now, til late August), the guys from The Move have been going over some of the best stages from the US Postal years. It’s a cool format, sort of like a commentary track over the exciting parts of the climbs and pursuits.

I especially enjoy the commentary from Johan Bruyneel, who was the team director at the time. The insider commentary on strategy is neat — hard to appreciate as a TV viewer of cycling.

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Weekend Reading: Observable Edition

September 7, 2019 • #

This week’s links are all interactive notebooks on Observable. Their Explore section always highlights interesting things people are creating. A great learning tool for playing with data and code to see how it works.

⌨️ The Enigma Machine

Easily the most impressive interactive notebook I’ve ever seen. This one from Tom shows the electromechanical pathways of the German Enigma machine at work — enter a character and see how the rotors and circuits encrypt text.

🚲 A Bicycle Drivetrain Analyzer

Another great example of the power of interactive programs. This one lets you compute bicycle chainring gear ratios by speed setting. You can add multiple cassettes and chainrings to compare:

Bicycle drivetrain analysis

🌍 Mapping the Mediterranean

Have to include a map example. Here the author brings in DEM data then styles and generates it all in code with GDAL for data manipulation and D3 for graphics.

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Watts vs. Speed

August 4, 2019 • #

After a long ride today, I was looking at the stats on Strava and wondering how wattage calculations work to determine power. Strava has a built in estimate it uses for your power rating if you don’t have a power meter on your bike. From looking into it, their calculations look pretty sophisticated for estimating power pretty closely, unless you’re really riding in extreme conditions:

The power produced while riding is made up of several components:

  • Power produced to overcome the rolling resistance of forward motion.
  • Power produced to overcome wind resistance.
  • Power produced to overcome the pull of gravity (in the case of climbing hills).
  • Power produced to accelerate from one speed to another.

The total power produced, P(total), is the sum of all four power components.

P(total) = P(rolling resistance) + P(wind) + P(gravity) + P(acceleration)

It looks like the biggest source of error would be the environmentals, particularly wind resistance and elevation change (if the GPS elevation data is poor). My ride today shows an average 103 watts for the 1 hour 20 minute ride. Since it’s almost totally flat and their was only a little wind today, it should be pretty accurate. Seems to me that wind-induced error would sort of cancel itself out on circuitous routes like this one — for every segment of headwind, you get another with tailwinds.

I also found this bike calculator that takes various inputs and adjusts the resulting speed and watts accordingly.

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Cairo to Cape Town on a Bike

July 30, 2019 • #

Endurance cyclist Mark Beaumont is best known for his “around the world in 80 days” ride starting in Paris and crossing 3 continents in 78 days, putting him in the Guinness Book for the accomplishment.

A few years back he did this ride from Cairo to Cape Town across Africa — 41 days, 6,762 miles, 190K feet of climbing, 160 miles per day. To me it’s as stunning in itself as the around the world ride. Some of the shots in this video of him traversing the Sahara through Sudan and the mountains of Ethiopia are incredible.

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Cycling Commute

July 26, 2019 • #

This week I tried out commuting on the bike, like I posted about earlier this week. It’s a comfortable, nice ride with a dedicated bike lane the whole way from my house, a block away from the Island Loop through Shore Acres and Snell Isle. I haven’t done any rides to the office from the new place yet; it’s a decent morning workout of about 6 miles when connecting up to the North Bay Trail route downtown.

There were some crazy summer thunderstorms all week long. I had originally intended to work in a Tuesday / Thursday plan for bike commutes each week, but Mother Nature screwed that up Thursday. Some weather came through during the day today, but I dodged it for the ride home.

A commute plan like this would add a solid 25+ miles of cycling weekly to my health routine. I want to at least try to keep this up through the summer before Elyse starts back at school.

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Biking Again

July 21, 2019 • #

Last weekend I got the bike back up and running again. It’s been out of commission in the garage since the move a few months ago. Just had to clean it up a bit and put some air in the tires and it’s good to go. I’ve got a budding plan to start commuting down to the office, thinking I’ll start with a target of doing that two times per week to start. It’s about a 6 mile ride each way, which wouldn’t take much longer than driving, but in the summer heat here it’s plenty to require a shower when I get there. With the unpredictable weather here in the summer, committing myself to more than a couple commutes per week will just mean I’ll come up short on the goal.

My bike is only a single speed (a Takara Kabuto with no bells and whistles. It’s been reliable over the 7 or so years I’ve had it — no problems at all but tire replacement. I’m exploring getting a more serious road bike at some point, but I’ve told myself that’s not allowed until I can build up a good pattern of regular usage on the one I’ve got.

I went out for a loop ride yesterday and it felt good. My regular running has got my cardio up to make a decent pace ride pretty easy.

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Tour de France

July 15, 2019 • #

The Tour de France is on right now, reaching the first rest day after a wild first 10 stages of racing. Julian Alaphilippe (a Frenchman) is in the yellow jersey, who’s one of the great opportunists in the field, with a win at Milan-San Remo earlier this year.

The Tour is one of my favorite sporting events of the year. I’ve gotten familiar enough with the UCI Tour over the last 5 or 6 years that I enjoy all of the flavors of races — the big grand tours, the classics, and the world championship events.

But one of the main reasons it’s a special event for me is the sentimental nature of what’s gone on in my life in past years during the Tour: Elyse was born during the 2015 race, and I had my diagnosis and surgery during the 2017 event. One was a very positive experience, sitting home each day on leave holding the baby and watching the stages, and the second of course not so positive, but watching each day gave me something to hold my attention and follow to keep my mind occupied during that rough patch on the road to recovery.

In the past two years the Tour brings those times back to me. It is “just” a sporting event, but it’s a sentimental one, for me.

Yesterday’s stage 10 into Albi was suspected to be a relaxed flat day leading into the rest day, but it was anything but. Crosswinds, some complacent GC riders in the back of the peloton, and some well-timed attacks in the last 25km created a split in the field and a chaotic blitz for the line. The climb of La Planche des Belles Filles on stage 6 and De Gendt’s breakaway win on stage 8 were also incredible to watch. A great way to kickoff week 1 with a competitive race in the GC standings.

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Places: Col du Galibier

June 25, 2019 • #

The mountain stages of the Tour de France are some of my favorite events in sports. This edition of Places features a tribute to this year’s 18th stage, and one of my favorite climbs of the Alps: the Col du Galibier, a 2,600m HC beast with an epic descent on the other side.

Col du Galibier

Galibier was last climbed in the 2017 Tour, during an awesome Stage 17 when Primož Roglič won the day on a route that included famous climbs on Col de la Croix de Fer, Col du Télégraphe, and the Galibier.

This year’s stage route includes the Galibier and another HC fixture in Col d’Izoard, also last seen in the 2017 edition when Warren Barguil had a memorable mountaintop finish there.

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Cycling: A Sport for Geographers

January 13, 2019 • #

The UCI World Tour season kicks off this week with the Tour Down Under.

I started following pro cycling closely about 5 years ago, but since it’s fairly hard to get access to on broadcasts, I only get to watch a handful of events each year. With the NBC Cycling Pass you get some big events, like the Tour de France and Vuelta a España, plus some other fun ones in the spring like Paris-Roubaix, Paris-Nice, and Liège-Bastogne-Liège.

Last season while watching the Criterium du Dauphiné, it dawned on me one of the reasons I got into watching televised cycling tours so easily: it’s a great sport for a geographer. The sweeping views over the Massif Central, Pyrenees, or the rivers of the Alps are incredible. While I’m watching a stage and the peloton is passing through villages or past medieval landmarks, I’ll be on Wikipedia checking out the history of the places they’re racing.

With some top cyclist team moves in the off season, there are a few big things to watch. I’ll try and catch what I can of the Tour Down Under and get a preview. Never was able to watch that one before.

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