John has added quite a bit of text to the cranks page; more about crank length, and an entirely new section on how to check for several kinds of damage; also several illustrations where there were none before.
Tag: 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.
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 thru axles, which insert into a fork with a hole rather than a slot at the end of each blade. Our chainline page and cribsheet as well as our frame spacing page and cribsheet are now updated to cover these developments.
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.
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 an exhibit in a Klein vs. Cannondale lawsuit — and she still rides it!
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.
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 way to carry baggage. Our new article will help you to customize a fatbike, but also gives you a look into customizing bicycles, in general.
The article is taken from a running e-mail discussion in which Bruce contemplates choices, decides on a bicycle purchase, and describes the various steps of customization and how they worked out.
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.
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:
Does your bike make strange noises when you ride it? This article will try to help you make it shut up!
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 this case, the frame) of a run-of-the mill bicycle to upgrade it into a one that performs, and looks great too.
