Tyre sizes varied from 15-inch P205/65 for the Commodore Executive, Acclaim and Berlina (the latter, and following models, with alloy wheels), to 16-inch P215/60 for the Calais and P225/50 for the Commodore S, and the largest P235/45 on 17-inch wheels for the Commodore SS.
The tyre sizes varied across different Commodore models, from 15-inch P205/65 for the Executive, Acclaim, and Berlina (with alloy wheels on later versions), to 16-inch P215/60 for the Calais and 17-inch P225/50 for the S-class Commodore. The largest tyres were used on the SS model.