I think it is called a rowel
The wheel on a spur is a "rowel".
The teeth are usually provided on the pinion of the spur wheel, to drive the spur wheel.
The teeth are usually provided on the pinion of the spur wheel, to drive the spur wheel.
The pinion wheel is smaller than the spur wheel in single purchase crab because it is the one that drives the spur wheel.
The 2014 Bentley Flying-SPUR has all wheel drive.
The 2006 Bentley Continental-Flying-SPUR has all wheel drive.
The 2012 Bentley Continental-Flying-SPUR has all wheel drive.
The 2007 Bentley Continental-Flying-SPUR has all wheel drive.
The 2013 Bentley Continental-Flying-SPUR has all wheel drive.
The 2009 Bentley Continental-Flying-SPUR has all wheel drive.
The 2011 Bentley Continental-Flying-SPUR has all wheel drive.