Campagnolo has come up with another new chainring bolt pattern (why?) and we have added it to our coverage. It’s the most complete you’ll find anywhere. Print out the template that corresponds to the kind of bolt pattern of your chainring, lay the chainring down on it and you get an instant readout of the bolt-circle diameter, brand and model of the original manufacturer’s version of this chainring. We cover classic brands as well as the newest and most confusing models with irregular bolt-circle patterns. Our coal here as with all of our cribsheets is to help you match parts, and to show cross-brand compatibility when it is not obvious and not promoted by the manufacturers. Thanks to Jacob Allen for the drawings in AutoCad!
Category: Updates
Shimano Cassette Bodies
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 you might expect, and some incompatibility that you might 
not. See how you might be able to make a 7-speed hub into 10-speed, or vice versa…
Saddle Repair
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 in the image below was assembled from an Idéale Model 92 top and Model 80 undercarriage. Good as new!
SRAM Pentasport
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.
Time Travel
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 answers! Read about them here!
And Another IG Hub
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 Super 7/SRAM Spectro 7 hub.
It’s been 14 years now
Sheldon Brown died on February 4, 2008. It’s hard to believe 14 years have past since then. This is a picture of Sheldon at a younger age.
That isn’t a mouse under his front tire. Selfie pioneer — he tripped the shutter of his camera with an air bulb.
SRAM DualDrive clickbox, cable and shifter
The SRAM DualDrive hub was the mainstay hub for hybrid gearing for 15 years, from 2000 through 2015. Very many are still in use. Read here about how to install, adjust and adapt its unusual shifting parts.
More measuring tricks
Our page on ways to measure bicycle components can save time and avoid the need for some expensive tools. We have now added information on how to compare chains. And the example in the photo here: How to determine the length of a cable without uncoiling it.
Remembering Sheldon
Sheldon Brown would have been 77 years old today. We miss him very much.
In this picture his big brother Richard is reading to him. And at the right is the cover of the book Richard was reading.
“Run, run
As fast as you can,
You can’t catch me,
I’m the gingerbread man.”
