Speed in Gears
Post date: Dec 25, 2011 12:25:49 PM
The following is based on information taken from the Cycleserv publication: Norton Commando ‘S’ Type, Roadster, Fastback (Page 66). It is based on standard gear ratios and sprockets with 19” wheels and a 4.10 section rear tyre. The only variable is the number of teeth on the gearbox sprocket. My Commando is now fitted with a 20 tooth gearbox sprocket, down from the 22 tooth sprocket with which it came.