Category Archives: Updates

We are here!

Ah, the hand-wringing. It seems to have started with inquired on our Facebook page, then posted on the road.cc blog without waiting for our response. Harris Cyclery has closed after a 70-year run, hit hard by pandemic supply issues. Sheldonbrown.com … Continue reading

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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

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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?

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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,

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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

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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

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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

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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.

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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

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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

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