How wide is the rear wheel on a Honda 1800 goldwing motorcycle?

The tire size for the 1800 Gold Wing is 180/60R16. Bridgestone adds a prefix number G704 in front of this number, so from them the full name is G704 180/60R16. It is very important that you use only this tire size recommended by Honda for this bike. Other tire sizes will markedly change the driving and handling characteristics of this large bike. In some other tires that have been tried for this bike the sidewall has proved not to be sufficiently strong to carry the weight of the bike, such as the R70 tire which is very different and could be dangerous on this bike.