33-inch tires on 18-inch wheels

For a 33-inch-tall tire on a 18-inch wheel, look at 33x11.50R18, 33x12.50R18, 295/65R18 (33.1 in), 275/70R18 (33.2 in), 325/60R18 (33.4 in), 265/70R18 (32.6 in) and 285/65R18 (32.6 in). These are the sizes in the maker data books within ±0.5 in of 33 in on 18-inch wheels. A 18-inch wheel leaves a 7.5 in sidewall on a 33-inch tire.

Size	Calculated	Width	Published by makers
265/70R18	32.6 in	10.4 in	32.5–33 in
275/70R18	33.2 in	10.8 in	33.1–33.62 in
285/65R18	32.6 in	11.2 in	32.5–32.83 in
33x11.50R18	33.0 in	11.5 in	32.52 in
295/65R18	33.1 in	11.6 in	33.4 in
33x12.50R18	33.0 in	12.5 in	32.5–33 in
325/60R18	33.4 in	12.8 in	33.03–33.35 in

Other codes with about the same diameter

Standard metric codes within ±0.5 in that we did not find in the data books we use (they may exist from other makers, or not at all): 225/85R18 (33.1 in), 255/75R18 (33.1 in), 345/55R18 (32.9 in), 315/60R18 (32.9 in), 235/80R18 (32.8 in), 355/55R18 (33.4 in), 245/80R18 (33.4 in), 335/55R18 (32.5 in).

Compare with your current size

Set up for: going bigger: 33-inch tires on 18-inch wheels · Different situation?

Your current size

Current tire size

e.g. 265/70R17, 2657017 or 33x12.50R20

Where do I find my size?

It's on the tire sidewall, e.g. P265/70R17 115T, and on the tire placard sticker on the driver's door jamb (also in the owner's manual). The placard shows the size the vehicle came with; the sidewall shows what is fitted now. If they differ, use the placard as your starting point. Digits are enough here: 2657017 or 33125020.

Size you're considering

Other wheel sizes: 33" on 15" · 33" on 16" · 33" on 17" · 33" on 20" · 33" on 22"

FAQ

What metric size is a 33 inch tire on a 18 inch rim?

Important: These are calculated (nominal) dimensions, not a fitment recommendation. Real tires of the same size differ by brand and model (makers allow about ±3% of section height), and width changes with the rim it is mounted on. The math can't see wheel width and offset, clearance at full steering lock and suspension travel, load index, speed rating, or what your vehicle maker approves. Before changing size, check your door-jamb placard and owner's manual and ask a tire professional. A replacement tire must meet or exceed the load index and speed rating on the placard.