33x12.50R18 Tire Size: 33.0" Tall
Straight answer
A 33x12.50R18 stands 33.0 inches tall and 12.5 inches wide on a 18-inch wheel. NTW stocks 29 tire models in this size right now.
33x12.50R18 dimensions
Overall diameter
33.00"
Section width
12.50"
Sidewall height
7.50"
Wheel diameter
18"
Circumference
103.7"
Revolutions per mile
611
≈ 318/60R18 metric. Nominal math; real tires run a few tenths off depending on brand, load range, rim width, and air pressure.
What 33x12.50R18 means
- 33Overall diameter: 33.0" tall
- 12.50Section width: 12.50" wide
- RRadial construction
- 18Fits a 18-inch wheel
Want the full rundown on sidewall codes, load index, and speed rating? Read how to read a tire size.
33x12.50R18 compared to nearby 18-inch sizes
Speedometer column assumes your truck is calibrated for 33x12.50R18 and reads 65 mph.
| Size | Height | vs 33x12.50R18 | Width change | Actual speed | Compare |
|---|---|---|---|---|---|
| 275/65R18 | 32.1" | -0.9" (-2.8%) | -1.7" | 63.2 mph | Full comparison |
| 285/65R18 | 32.6" | -0.4" (-1.3%) | -1.3" | 64.2 mph | Full comparison |
| 265/70R18 | 32.6" | -0.4" (-1.2%) | -2.1" | 64.2 mph | Full comparison |
| 275/70R18 | 33.2" | +0.2" (+0.5%) | -1.7" | 65.3 mph | Full comparison |
| 295/70R18 | 34.3" | +1.3" (+3.8%) | -0.9" | 67.5 mph | Full comparison |
Rule of thumb: inside 3% of stock diameter feels stock; past 8 to 10% and most owners budget for a re-gear. Run your exact numbers in the tire size calculator, or check what stepping down to 265/70R18 does.
Tires in stock in 33x12.50R18
29 models, 33 SKUs at NTW (different load ranges and sidewall styles). Refreshed daily.
| Tire | Type | Options | From |
|---|---|---|---|
| Mickey Thompson Baja Boss | Mud Terrain | 2 | $427 |
| Mickey Thompson Baja Boss AT | All Terrain | 2 | $425 |
| Nitto Ridge Grappler | All Terrain | 2 | $356 |
| Toyo Open Country M/T | Mud Terrain | 2 | $418 |
| AMP Off-Road AT Terrain Attack | All Terrain | 1 | $297 |
| Bfgoodrich All-Terrain T/A KO3 | All Terrain | 1 | $411 |
| Bfgoodrich Mud-Terrain T/A KM3 | Mud Terrain | 1 | $439 |
| Cosmo Mud Kicker | Mud Terrain | 1 | $206 |
| Falken Wildpeak A/T4W | All Terrain | 1 | $433 |
| Falken Wildpeak R/T01 | All Terrain | 1 | $407 |
| Forceland Tyre Rebel Hawk R/T | All Terrain | 1 | $209 |
| Fuel Off-Road Gripper MT | Mud Terrain | 1 | $369 |
| Interco Super Swamper SS-M16 | Mud Terrain | 1 | $479 |
| Interco Trxus M/T | Mud Terrain | 1 | $271 |
| Interco Trxus STS Radial | All Terrain | 1 | $516 |
| Interco Vortrac LT | All Terrain | 1 | $452 |
| Kenda Klever M/T 2 | Mud Terrain | 1 | $391 |
| Kenda Klever RT | All Terrain | 1 | $379 |
| Mickey Thompson Baja Legend EXP | All Terrain | 1 | $388 |
| Mickey Thompson Baja Legend MTZ | Mud Terrain | 1 | $429 |
| Nitto Mud Grappler | Mud Terrain | 1 | $436 |
| Nitto Terra Grappler G3 | All Terrain | 1 | $395 |
| Nitto Trail Grappler M/T | Mud Terrain | 1 | $426 |
| Toyo Open Country A/T III | All Terrain | 1 | $415 |
| Toyo Open Country R/T | All Terrain | 1 | $408 |
| Toyo Open Country R/T Pro | All Terrain | 1 | $439 |
| Toyo Open Country R/T Trail | All Terrain | 1 | $427 |
| Venom Power Terra Hunter RT Plus | All Terrain | 1 | $336 |
| Venom Power Terra Hunter X/T | All Terrain | 1 | $308 |
Prices per tire at NTW when last checked; confirm at checkout.
Frequently Asked Questions
How tall is a 33x12.50R18 tire in inches?+
A 33x12.50R18 is 33.00 inches tall and 12.50 inches wide, with a 7.50-inch sidewall on a 18-inch wheel. Real mounted tires vary a few tenths of an inch by brand, load range, and rim width.
What is 33x12.50R18 in metric?+
The nearest metric equivalent is 318/60R18. Flotation sizes like 33x12.50R18 list the actual height and width in inches, so there's no math to do: 33" tall, 12.50" wide.
What does 33x12.50R18 mean?+
33x12.50R18 is flotation sizing, which just tells you the dimensions in inches: 33" tall, 12.50" wide, on a 18-inch wheel.
33x12.50R18 vs 295/70R18: how much bigger?+
295/70R18 is 1.3 inches taller (3.8%) and 0.9 inches narrower. Going from 33x12.50R18 to 295/70R18, a speedometer reading 65 mph means you're actually doing 67.5.
Looking for another size? See the full truck tire size chart.