195/75R16 designates a tire 195 mm (7.7") wide with a sidewall 75% as tall as it is wide — about 146 mm (5.8") — mounted on a 16-inch wheel. That works out to an overall diameter of roughly 27.5", a circumference of about 86.4", and approximately 733 revolutions per mile. Exact figures vary slightly by manufacturer and tread design.
Of the 22 195/75R16 tire models we track, the most common category is highway all-season truck (16 models), followed by winter (4) — a good indicator of the kind of vehicles and driving this size is designed for.