235/75R17 designates a tire 235 mm (9.3") wide with a sidewall 75% as tall as it is wide — about 176 mm (6.9") — mounted on a 17-inch wheel. That works out to an overall diameter of roughly 30.9", a circumference of about 97.0", and approximately 653 revolutions per mile. Exact figures vary slightly by manufacturer and tread design.
Of the 32 235/75R17 tire models we track, the most common category is all-terrain (24 models), followed by highway all-season truck (8) — a good indicator of the kind of vehicles and driving this size is designed for.