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Author Archives: John
On-Road Repairs update
We have added to our page about on-road repairs. There is now a quick list so you can check which particular tools you might need for your bicycle, and we have covered some additional tools. The basic on-road repairs will … Continue reading
Posted in Updates
Tagged bicycle, maintenance, repair, rim, Sheldon, Sheldon Brown, sheldonbrown, sheldonbrown.com, tires, tools, wheel
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ShelBroCo Quadratech
Introducing ShelBroCo QuadraTech Chainrings and sleeve nuts. Throw away those obsolete chainrings! The unbearably vexing problem of sleeve-nut rotation has bedeviled generations of bicycle mechanics. Who else would you expect to come up with a solution but ShelBroCo?
Posted in Updates
Tagged April, April Fool, bolt, chainring, shelbroco, Sheldon, Sheldon Brown, sheldonbrown, sheldonbrown.com, sleeve nut
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Derailer adjustment — and maintenance
We have added new sections on derailer maintenance to the derailer adjustment page, including how to cannibalize rear derailers, being careful about compatibility, and how to check cables,
Posted in Updates
Tagged adjustment, bicycle, derailer, derailleur, front, rear
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Modeling bicycle dynamics
We publish another paper by Osman Isvan. He uses a simplified model with only 3 degrees of freedom and simulates system frequency response under steady-state and transient conditions. He investigates the effects on vibration isolation of several key parameters including … Continue reading
Posted in Updates
Tagged bicycle, cyclecomputer, data, energy, Garmin, GPS, Isvan, Osman, Osman Isvan, Power meter, resonance, Sheldon, Sheldon Brown, sheldonbrown, sheldonbrown.com, speed
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Extensive revision of chainwheel bolt-circle information
A few months ago, a reader prompted us to make some updates to our chainwheel bolt circle cribsheet. But now we have followed up on that effort, greatly expanding our coverage, and we have added a set of templates which … Continue reading
Posted in Updates
Tagged BCD, bicycle, bolt circle, bolt circle diameter, chainring, chainwheel, crank, crankset, diameter, stack bolts
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GoPro Hero 5 Session camera
New article about the GoPro Hero5 Session action camera, latest in our series of articles about shooting video from a bicycle. This is a very small and light camera which will not weigh down a helmet and is especially good … Continue reading
GPS not working right on your smartphone?
Older smartphone no longer maps bicycle routes well? Rides are recorded as 173,000 hours long? (Really!) New article by our friend Mark Sevier explains these problems and offers some solutions.
Posted in Updates
Tagged Android, Garmin, GPS, iPhone, RidewithGPS, smartphone, Strava
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Update to Bolt Circle Diameter Cribsheet
We have reviewed the bolt circle diameter cribsheet, checked bolt-hole spacings using trigonometry and made some corrections. Apparently, the spacings were measured rather than calculated based on angles — and measurement is never exact! We have also added entries for … Continue reading
Posted in Updates
Tagged BCD, bicycle, bolt circle, bolt circle diameter, chainring, chainwheel, crank, crankset, diameter, stack bolts
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Osman Isvan on Hills, Winds — and Data
Osman Isvan takes a deeper look into hills and winds. Do you (or should you) work harder when climbing a hill? How hard do you (or should you) work on a given hill? Does it depend on your gearing? The … Continue reading
Posted in Updates
Tagged aerodynamics, bicycle, climb, climbing, gearing, hills, Isvan, Osman, Osman Isvan, propulsion, Sheldon, Sheldon Brown, sheldonbrown, sheldonbrown.com, wind
2 Comments
Osman Isvan on Ride Data
Osman analyzes data from over 1000 of his own bicycle rides to see what they show, and describes what might be discovered by mining the huge troves of data held by Strava, RidewithGPS and other GPS-based mapping services. Osman makes … Continue reading
Posted in Updates
Tagged bicycle, cyclecomputer, data, energy, Garmin, GPS, Power meter, Sheldon, Sheldon Brown, sheldonbrown, sheldonbrown.com, speed
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