Tag Archives: sheldonbrown

ShelBroCo Quadratech

Posted on March 31, 2021 by John

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 , , , , , , , , , | Comments Off on ShelBroCo Quadratech

Modeling bicycle dynamics

Posted on January 12, 2021 by John

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 , , , , , , , , , , , , , , , | Comments Off on Modeling bicycle dynamics

Osman Isvan on Hills, Winds — and Data

Posted on June 5, 2020 by John

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 , , , , , , , , , , , , , , | 2 Comments

Osman Isvan on Ride Data

Posted on May 3, 2020 by John

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 , , , , , , , , , , , | Comments Off on Osman Isvan on Ride Data

No joke

Posted on March 31, 2020 by John

It is traditional for sheldonbrown.com to post an April Fool’s day page, but this year we couldn’t think of one that wasn’t either frivolous or, if it addresses the present situation, dark humor and potentially offensive to people who have … Continue reading →

Posted in Updates | Tagged , , , , , , , , | 2 Comments

Selling Bicycles and Components

Posted on March 11, 2020 by John

We have expanded our article for individuals selling bicycles and components — which also holds advice for buyers. There is a new section about shipping. This article holds all the basic information you need on where to post an advertisement … Continue reading →

Posted in Updates | Tagged , , , , , , , , | Comments Off on Selling Bicycles and Components

Synchronizing Audio and Video

Posted on March 4, 2020 by John

Sheldonbrown.com technical writer and editor John Allen frequently shoots video from his bicycle using more than one camera; sometimes a separate audio recorder. The output must be synchronized in post production. John has now performed a major update on his … Continue reading →

Posted in Updates | Tagged , , , , , , , , , , , , , , , , , , , , , | Comments Off on Synchronizing Audio and Video

Braking News

Posted on February 9, 2020 by John

We have updated our page about the different types of bicycle brakes, which added descriptions and several photos illustrating the different types.  

Posted in Updates | Tagged , , , , , , , , , , | Comments Off on Braking News

Additions to cranks page

Posted on December 22, 2019 by John

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.

Posted in Updates | Tagged , , , , , , , , , , , , , | Comments Off on Additions to cranks page

Gear calculator updated

Posted on November 11, 2019 by John

The Gear Calculator has been updated with new Shimano, SRAM and Campagnolo cassettes, and the new Shimano Steps 5-speed internal-gear hub for E-bikes. French and German versions of the Calculator have been updated too.

Posted in Updates | Tagged , , , , , , , , , , , , , , , , , , , , , , , , , , , | 1 Comment