275/65R18 Tire Size: 32.1" Tall, a 32-Inch Tire
Straight answer
A 275/65R18 stands 32.1 inches tall and 10.8 inches wide on a 18-inch wheel, which makes it a 32-inch tire in truck-speak. NTW stocks 24 tire models in this size right now.
275/65R18 dimensions
Overall diameter
32.07"
Section width
10.83"
Sidewall height
7.04"
Wheel diameter
18"
Circumference
100.8"
Revolutions per mile
629
≈ 32.1x10.8R18 flotation. Nominal math; real tires run a few tenths off depending on brand, load range, rim width, and air pressure.
What 275/65R18 means
- 275Section width: 275 mm (10.8") wall to wall
- 65Aspect ratio: sidewall is 65% of the width, so 7.0" 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.
275/65R18 compared to nearby 18-inch sizes
Speedometer column assumes your truck is calibrated for 275/65R18 and reads 65 mph.
| Size | Height | vs 275/65R18 | Width change | Actual speed | Compare |
|---|---|---|---|---|---|
| 285/65R18 | 32.6" | +0.5" (+1.6%) | +0.4" | 66.0 mph | Full comparison |
| 265/70R18 | 32.6" | +0.5" (+1.7%) | -0.4" | 66.1 mph | Full comparison |
| 33x12.50R18 | 33.0" | +0.9" (+2.9%) | +1.7" | 66.9 mph | Full comparison |
| 275/70R18 | 33.2" | +1.1" (+3.4%) | 0.0" | 67.2 mph | Full comparison |
| 295/70R18 | 34.3" | +2.2" (+6.8%) | +0.8" | 69.4 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.
Trucks that come with 275/65R18
- Ram 1500 (2019–2026) · Rebel
- Chevrolet Silverado 1500 (2019–2026) · Trail Boss, ZR2
- Ford F-150 (2021–2026)
- Ford F-150 (2015–2020)
Tires in stock in 275/65R18
24 models, 37 SKUs at NTW (different load ranges and sidewall styles). Refreshed daily.
| Tire | Type | Options | From |
|---|---|---|---|
| Toyo Open Country A/T III | All Terrain | 5 | $332 |
| Nitto Terra Grappler G3 | All Terrain | 3 | $297 |
| Bfgoodrich All-Terrain T/A KO3 | All Terrain | 2 | $330 |
| Bfgoodrich Trail-Terrain T/A+ | All Terrain | 2 | $270 |
| Falken Rubitrek A/T | All Terrain | 2 | $255 |
| Falken Wildpeak A/T4W | All Terrain | 2 | $322 |
| Nitto Ridge Grappler | All Terrain | 2 | $317 |
| Toyo Open Country H/T II | All Terrain | 2 | $255 |
| Toyo Open Country R/T | All Terrain | 2 | $318 |
| BFGoodrich HD All Terrain KT | All Terrain | 1 | $351 |
| Bfgoodrich Mud-Terrain T/A KM3 | Mud Terrain | 1 | $350 |
| Falken Wildpeak R/T01 | All Terrain | 1 | $379 |
| Ironman MTX | All Terrain | 1 | $199 |
| Kenda Klever RT | All Terrain | 1 | $305 |
| Mickey Thompson Baja Boss AT | All Terrain | 1 | $317 |
| Mickey Thompson Baja Legend EXP | All Terrain | 1 | $317 |
| Nitto EXO Grappler | All Terrain | 1 | $316 |
| Toyo Celsius Cargo | All Terrain | 1 | $268 |
| Toyo M-55 | Commercial, On/Off-Road | 1 | $358 |
| Toyo Open Country C/T | All Terrain | 1 | $357 |
| Toyo Open Country M/T | Mud Terrain | 1 | $386 |
| Toyo Open Country R/T Pro | All Terrain | 1 | $385 |
| Toyo Open Country R/T Trail | All Terrain | 1 | $342 |
| Venom Power Terra Hunter X/T | All Terrain | 1 | $203 |
Prices per tire at NTW when last checked; confirm at checkout.
Frequently Asked Questions
How tall is a 275/65R18 tire in inches?+
A 275/65R18 is 32.07 inches tall and 10.83 inches wide, with a 7.04-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 275/65R18 a 32-inch tire?+
Close enough that everybody calls it one. It measures 32.1 inches, so it's sold and talked about as a 32. The flotation equivalent is 32.1x10.8R18.
What does 275/65R18 mean?+
275/65R18 means a tire 275 millimeters wide with a sidewall 65% as tall as it is wide, built for a 18-inch wheel.
275/65R18 vs 285/65R18: how much bigger?+
285/65R18 is 0.5 inches taller (1.6%) and 0.4 inches wider. Going from 275/65R18 to 285/65R18, a speedometer reading 65 mph means you're actually doing 66.0.
Looking for another size? See the full truck tire size chart.