285/65R18 Tire Size: 32.6" Tall, a 33-Inch Tire
Straight answer
A 285/65R18 stands 32.6 inches tall and 11.2 inches wide on a 18-inch wheel, which makes it a 33-inch tire in truck-speak. NTW stocks 19 tire models in this size right now.
285/65R18 dimensions
Overall diameter
32.59"
Section width
11.22"
Sidewall height
7.29"
Wheel diameter
18"
Circumference
102.4"
Revolutions per mile
619
≈ 32.6x11.2R18 flotation. Nominal math; real tires run a few tenths off depending on brand, load range, rim width, and air pressure.
What 285/65R18 means
- 285Section width: 285 mm (11.2") wall to wall
- 65Aspect ratio: sidewall is 65% of the width, so 7.3" tall
- 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.
285/65R18 compared to nearby 18-inch sizes
Speedometer column assumes your truck is calibrated for 285/65R18 and reads 65 mph.
| Size | Height | vs 285/65R18 | Width change | Actual speed | Compare |
|---|---|---|---|---|---|
| 275/65R18 | 32.1" | -0.5" (-1.6%) | -0.4" | 64.0 mph | Full comparison |
| 265/70R18 | 32.6" | +0.0" (+0.1%) | -0.8" | 65.0 mph | Full comparison |
| 33x12.50R18 | 33.0" | +0.4" (+1.3%) | +1.3" | 65.8 mph | Full comparison |
| 275/70R18 | 33.2" | +0.6" (+1.8%) | -0.4" | 66.1 mph | Full comparison |
| 295/70R18 | 34.3" | +1.7" (+5.1%) | +0.4" | 68.3 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 275/65R18 does.
Tires in stock in 285/65R18
19 models, 21 SKUs at NTW (different load ranges and sidewall styles). Refreshed daily.
| Tire | Type | Options | From |
|---|---|---|---|
| Falken Wildpeak A/T4W | All Terrain | 2 | $377 |
| Nitto Terra Grappler G3 | All Terrain | 2 | $367 |
| AMP Off-Road Mud Terrain Attack MT | Mud Terrain | 1 | $329 |
| AMP Off-Road Terrain Pro AT | All Terrain | 1 | $262 |
| Bfgoodrich All-Terrain T/A KO3 | All Terrain | 1 | $399 |
| BFGoodrich HD All Terrain KT | All Terrain | 1 | $420 |
| Bfgoodrich Mud-Terrain T/A KM3 | Mud Terrain | 1 | $419 |
| Falken Wildpeak M/T | Mud Terrain | 1 | $432 |
| Falken Wildpeak R/T01 | All Terrain | 1 | $410 |
| Interco Super Swamper SS-M16 | Mud Terrain | 1 | $471 |
| Ironman MTX | All Terrain | 1 | $223 |
| Mickey Thompson Baja Boss AT | All Terrain | 1 | $421 |
| Mickey Thompson Baja Legend EXP | All Terrain | 1 | $376 |
| Nitto Ridge Grappler | All Terrain | 1 | $417 |
| Nitto Trail Grappler M/T | Mud Terrain | 1 | $419 |
| Toyo Open Country A/T III | All Terrain | 1 | $409 |
| Toyo Open Country R/T | All Terrain | 1 | $433 |
| Toyo Open Country R/T Trail | All Terrain | 1 | $421 |
| Venom Power Terra Hunter X/T | All Terrain | 1 | $293 |
Prices per tire at NTW when last checked; confirm at checkout.
Frequently Asked Questions
How tall is a 285/65R18 tire in inches?+
A 285/65R18 is 32.59 inches tall and 11.22 inches wide, with a 7.29-inch sidewall on a 18-inch wheel. Real mounted tires vary a few tenths of an inch by brand, load range, and rim width.
Is 285/65R18 a 33-inch tire?+
Close enough that everybody calls it one. It measures 32.6 inches, so it's sold and talked about as a 33. The flotation equivalent is 32.6x11.2R18.
What does 285/65R18 mean?+
285/65R18 means a tire 285 millimeters wide with a sidewall 65% as tall as it is wide, built for a 18-inch wheel.
285/65R18 vs 33x12.50R18: how much bigger?+
33x12.50R18 is 0.4 inches taller (1.3%) and 1.3 inches wider. Going from 285/65R18 to 33x12.50R18, a speedometer reading 65 mph means you're actually doing 65.8.
Looking for another size? See the full truck tire size chart.