The word hub is a noun. Hub means (1) the central part of a car wheel (or fan or propeller etc) through which the shaft or axle passes, (2) a center of activity or interest or commerce or transportation; a focal point around which events revolve.
The following articles and web pages elaborate on the word hub.
Traditional bicycle wheels contain a central hub surrounded by wire spokes that connect the hub to a circular rim. This bicycle wheelset guide includes links to bicycle wheel suppliers.
https://www.bicycleparts.us/wheelsets.htm
Rims refer to the wheels of a car, which are attached to their hubs by nuts and bolts. The rims of a car may or may not be concealed by a hub cap.
https://www.carrims.us/
Helsinki is the capital city and economic hub of Finland; the city is also known for its beautiful architecture, excellent cafes and restaurants, theaters and galleries, and plentiful shopping.
https://www.map-of-finland.com/helsinki.htm
The following articles provide recent hub-related news.
Glamping Hub premiers their first-ever active market place report to reveal 5 glamping travel trends for 2021.
PRWeb. Friday, 22 Jan 2021 00:00:00 GMT.
Google has updated Assistant on its own speakers and displays - like the Nest Hub and Mini - with a new feature.Starting 13 January 2021, Google's smart
Maggie Tillman. Pocket Lint. Thursday, 14 Jan 2021 04:59:12 +0000.
The following digital image illustrates the word hub.