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Sidewall

265/75R18

265 mm across the tread, a sidewall 75% of that — 199 mm — on a 18-inch rim. That puts the whole wheel at 33.6 inches tall.

199 mm sidewall855 mm · 33.6"
Sidewall
7.82"
199 mm
Overall
33.6"
854.7 mm
Circumference
105.7"
2.685 m
Revs per mile
599
per minute at 60 mph

What it needs to sit on

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It mounts on a rim between 7.5" and 9.5" wide, and the tread follows the rim: roughly 5 mm of section width for every half-inch, so about 255 mm across at the narrow end and 275 mm at the wide one. Written the way lift kits and wheel wells are, it is a 33.6×10.4R18 — tall by wide, in inches.

What goes wrong on this size

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3 drivers have filed a complaint. 0 of them ended in a crash, and nobody was hurt. Nobody died.

3 of them name what let go, and it is most often crack. Pirelli is named more than any other brand.

What let goComplaints
crack2
puncture1

Where the wheel is named, 3 of 3 were on the rear, and 0 on the front.

What fits instead

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Same 18-inch rim, height within 3%. Past that the speedometer starts lying and things begin to rub.


SizeHeightRide heightSpeedo reads 60, you doCompare
285/70R1833.7" +0.2 %+0.8 mm60.1 mphside by side
245/80R1833.4" -0.6 %-2.8 mm59.6 mphside by side
275/70R1833.2" -1.5 %-6.3 mm59.1 mphside by side
255/75R1833.1" -1.8 %-7.5 mm58.9 mphside by side
275/75R1834.2" +1.8 %+7.5 mm61.1 mphside by side
245/85R1834.4" +2.2 %+9.5 mm61.3 mphside by side

Same height, different rim

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


265/70R19186 mm sidewall — 7% less
285/65R19185 mm sidewall — 7% less
235/80R19188 mm sidewall — 5% less
285/75R17214 mm sidewall — 8% more
245/75R19184 mm sidewall — 8% less
245/85R17208 mm sidewall — 5% more

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.


Fitted insteadReads 30Reads 50Reads 70Real miles per 10,000 shown
285/70R1830.1 mph50.1 mph70.1 mph10,018
245/80R1829.8 mph49.7 mph69.5 mph9,936
275/70R1829.6 mph49.3 mph69.0 mph9,854
255/75R1829.5 mph49.1 mph68.8 mph9,824
275/75R1830.5 mph50.9 mph71.2 mph10,176