255/70R18 Tire Size: 32.1" Tall, a 32-Inch Tire
Straight answer
A 255/70R18 stands 32.1 inches tall and 10.0 inches wide on a 18-inch wheel, which makes it a 32-inch tire in truck-speak. NTW stocks 8 tire models in this size right now.
255/70R18 dimensions
Overall diameter
32.06"
Section width
10.04"
Sidewall height
7.03"
Wheel diameter
18"
Circumference
100.7"
Revolutions per mile
629
≈ 32.1x10.0R18 flotation. Nominal math; real tires run a few tenths off depending on brand, load range, rim width, and air pressure.
What 255/70R18 means
- 255Section width: 255 mm (10.0") wall to wall
- 70Aspect ratio: sidewall is 70% 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.
255/70R18 compared to nearby 18-inch sizes
Speedometer column assumes your truck is calibrated for 255/70R18 and reads 65 mph.
| Size | Height | vs 255/70R18 | Width change | Actual speed | Compare |
|---|---|---|---|---|---|
| 265/65R18 | 31.6" | -0.5" (-1.5%) | +0.4" | 64.0 mph | Full comparison |
| 275/65R18 | 32.1" | +0.0" (+0.1%) | +0.8" | 65.0 mph | Full comparison |
| 285/65R18 | 32.6" | +0.5" (+1.7%) | +1.2" | 66.1 mph | Full comparison |
| 265/70R18 | 32.6" | +0.6" (+1.7%) | +0.4" | 66.1 mph | Full comparison |
| 33x12.50R18 | 33.0" | +0.9" (+2.9%) | +2.5" | 66.9 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 265/65R18 does.
Trucks that come with 255/70R18
- Jeep Gladiator (2020–2026) · 2020–2023: Overland, 80th Anniversary
- Jeep Wrangler (2007–2026) · 2007–2026: Unlimited Sahara, Sahara, Unlimited Sahara Altitude and others
- Toyota Tundra (2007–2026) · 2007–2021: SR5, Base, SR and others
- Ford Bronco (2021–2026) · 2021–2026: Outer Banks
- Ford Expedition (2007–2027) · 2007–2014: XLT, King Ranch, Eddie Bauer and others
- Jeep Wrangler (2018–2026) · Sahara
Tires in stock in 255/70R18
8 models, 9 SKUs at NTW (different load ranges and sidewall styles). Refreshed daily.
| Tire | Type | Options | From |
|---|---|---|---|
| Bfgoodrich Trail-Terrain T/A+ | All Terrain | 2 | $249 |
| Bfgoodrich All-Terrain T/A KO3 | All Terrain | 1 | $315 |
| Falken Rubitrek A/T | All Terrain | 1 | $229 |
| Falken Wildpeak A/T4W | All Terrain | 1 | $285 |
| Nitto Ridge Grappler | All Terrain | 1 | $293 |
| Nitto Terra Grappler G3 | All Terrain | 1 | $281 |
| Toyo Open Country A/T III | All Terrain | 1 | $273 |
| Toyo Open Country H/T II | All Terrain | 1 | $254 |
Prices per tire at NTW when last checked; confirm at checkout.
Frequently Asked Questions
How tall is a 255/70R18 tire in inches?+
A 255/70R18 is 32.06 inches tall and 10.04 inches wide, with a 7.03-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 255/70R18 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 32.1x10.0R18.
What does 255/70R18 mean?+
255/70R18 means a tire 255 millimeters wide with a sidewall 70% as tall as it is wide, built for a 18-inch wheel.
255/70R18 vs 285/65R18: how much bigger?+
285/65R18 is 0.5 inches taller (1.7%) and 1.2 inches wider. Going from 255/70R18 to 285/65R18, a speedometer reading 65 mph means you're actually doing 66.1.
Looking for another size? See the full truck tire size chart.