Author Archives: John

Revision to our bolt-circle diameter pages — several edits, and a new template for Wolf Tooth, Campagnolo and FSA chainrings with uneven bolt-hole spacing. Quickly identify chainrings and find their tooth count. https://sheldonbrown.com/templates-bcd.html

Thru axles have become common on high-end bicycles in recent years, replacing the classic quick release. We have a new post about thru axles — description, types, installation and care, advantages and disadvantages.

We have a new article on kickstands — choices, issues, installation. Sheldon didn’t write about them, because he didn’t use them. But John has them on a  couple bicycles, and they can be convenient.  

Plotting sprocket pairs and ratios as a two-dimensional graph makes it possible clearly to see which pairs have nearly the same ratio — and to identify good sequences. We have a graph and an article to describe it. />  

Now for the first time, we have created a page that shows and describes the different types of cassette bodies all the way from early Uniglide up through the latest 11- and 12-speed systems. There is far more compatibility than … Continue reading →

We have expanded our coverage of repair of leather saddles — several new photos and paragraphs of text. Also, in case you would rather not repair your saddle yourself, we have updated information on where to send it. The saddle … Continue reading →

We continue with our postings from the lost pages of the Sutherland’s Handbook for Bicycle Mechanics, 6th Edition — this time, the rebuilding instructions, parts list and troubleshooting chart for the Sachs/SRAM Pentasport 5-speed hub.

It is no wonder that cyclists choose to ride in the comfort, safety and privacy of our own homes. Yes, stationary bicycles are popular. But, if you are going nowhere, how about doing it at a relaxing pace? ShelBroCo has … Continue reading →