235/75R15

235 mm across the tread, a sidewall 75% of that — 176 mm — on a 15-inch rim. That puts the whole wheel at 28.9 inches tall.

What it needs to sit on

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It mounts on a rim between 6.5" and 8.5" wide, and the tread follows the rim: roughly 5 mm of section width for every half-inch, so about 225 mm across at the narrow end and 245 mm at the wide one. Written the way lift kits and wheel wells are, it is a 28.9×9.3R15 — tall by wide, in inches.

What goes wrong on this size

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219 drivers have filed a complaint. 34 of them ended in a crash, hurting 69 people. 3 people did not make it home.

170 of them name what let go, and it is most often tread separation. Firestone is named more than any other brand.

Where the wheel is named, 106 of 160 were on the rear, and 54 on the front.

What fits instead

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Same 15-inch rim, height within 3%. Past that the speedometer starts lying and things begin to rub.

Same height, different rim

Bigger rim, same overall height. Sharper steering, harsher ride, and far less rubber between your wheel and the next pothole.

Tires graded in this size

Longest-lasting tread first. The grade is set by the maker and checked by regulators.

If you fit something taller

A taller tire covers more ground per turn, so the needle reads low and the odometer counts short. Over ten thousand miles on the dial, the last column is what you really drove.