Tag Archives: bottom bracket

Tandem Updates

Pages about tandems and tandeming Sheldon Brown and family on home-built tandems[/caption] have been updated. We have more about disc brakes, brake levers, Gates synchronizing belts, and details about upgrading a cheap beach-resort tandem to ride with a child.

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Updates to chainline and frame-spacing pages.

As of 2018, fatbikes and disk brakes have led to several new axle-length standards. The problem of disk brakes’ pulling the hub out of the front dropouts  has been addressed with through axles, which insert into a fork with a … Continue reading

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Video of aluminum bicycle frame presentation

Now, a video to go with Harriet Fell’s article recently published on sheldonbrown.com: her presentation on the MIT aluminum bicycle frame project at the 2016 International Cycle History Conference.

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MIT aluminum bicycle project, 1974

New post: the MIT aluminum bicycle project, 1974, where modern aluminum bicycle frames got their start as student Marc Rosenbaum’s thesis project. sheldonbrown.com site owner Harriet Fell built one of the original MIT aluminum bicycle frames, it came to be … Continue reading

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Unthreaded bottom-bracket update

Major update to the unthreaded bottom bracket cribsheet: several additional ones covered, broken links repaired. yes, everything from Ashtabula one-piece crank BBs (as shown in the photo) to the Klein Team Super to eccentrics for tandems.

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Customizing a fatbike

Bruce Ingle customizes a fatbike — Fatbikes are intended for use on soft, muddy, sandy, snowy surfaces but they need customization to make them truly practical for such use — in particular, fenders, wide-range gearing including ultra-low gears, and a … Continue reading

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Bicycle frame fatigue-resistance testing

The groundbreaking article about fatigue-resistance testing of bicycle frames — the results surprised even the people doing the test — now in a much-improved new translation from the original German.

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Chirridos, Crujidos y Chasquidos…Creaks, Clicks & Clunks

Ahora también en español: Chirridos, Crujidos y Chasquidos… ¿Tu bici hace ruidos extraños cuando montas? ¡Este artículo intentará ayudarte a hacer que se calle! Traduccción de Pablo Zumárraga. And also revised in English: Creaks, Clicks & Clunks… Does your bike … Continue reading

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Raleigh Twenty page additions

Additions to the page on Raleigh Twenty bicycles — more detail on bottom-bracket replacements, headsets, brakes, handlebars. This page gives specific ideas about customizing the Twenty, and highlights Sheldon’s do-it-yourself approach in general, taking advantage of the strong points (in … Continue reading

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Bottom bracket information revised

We’ve added David Richardson’s photo of damage to a Shimano Octalink V1 crank from installing it on a V2 spindle to the bottom-bracket database. Also, we’ve coordinated bottom-bracket threading standards tables in the several files where they appear.

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