Ah, the hand-wringing. It seems to have started with someone at the road.cc blog who inquired on our Facebook page, then posted on without waiting for our response.
Harris Cyclery has closed after a 70-year run, hit hard by pandemic supply issues. Sheldonbrown.com got its start when Sheldon worked at Harris Cyclery, and we are very grateful to Harris Cyclery for its support. But, since 2010, sheldonbrown.com (except for the /harris pages) has floated its own boat, through online advertising.
We don’t know yet what other affiliation we may find, or whether we’ll go it alone, but you may rest easy. Ride your bike, and feel free to come to us for help keeping it in top shape.
A few months ago, a reader prompted us to make some updates to our chainwheel bolt circle cribsheet. But now we have followed up on that effort, greatly expanding our coverage, and we have added a set of templates which allow you quickly to identify the bolt circle of alnost every model of chainring, and the tooth count, without the need to measure or count by hand. It’s all here: 
