Tire Size Guide

305/70R18 Tires

Compare 15 available models across 2 categories, then confirm fitment for your vehicle.

Our Top Pick in 305/70R18
Nitto Recon Grappler A/T
All-TerrainValue

The Recon Grappler A/T by Nitto is a solid choice for those who prioritize off-road capability.

Off-road traction is a strong suit thanks to its aggressive tread design, making it suitable for varied terrains. Treadlife is backed by a 55,000-mile warranty, which is competitive within the all-terrain segment. Wet grip score of 6 is above the category average of 5.2, enhancing safety in rainy conditions.
72Spec score (est.)
Full analysis
14 models

Best All-Terrain Tires in 305/70R18

All All-Terrain tires

The Recon Grappler A/T by Nitto is a solid choice for those who prioritize off-road capability.

  • Off-road traction is a strong suit thanks to its aggressive tread design, making it suitable for varied terrains.
  • Treadlife is backed by a 55,000-mile warranty, which is competitive within the all-terrain segment.

Lacks 3PMSF certification, making it less suitable for drivers who need winter-capable all-terrain tires.

55,000 mi warrantyTreadwear 600Traction A
Spec score72estimated
Details
BFGoodrich All-Terrain T/A KO2Performance3PMSF Snow

The BFGoodrich All Terrain T/A KO2 is a strong contender for those who prioritize off-road capability.

  • Off-road traction is reliable due to its aggressive tread design, making it a solid choice for mixed terrain use.
  • Treadlife score of 8.3 and a 50,000-mile warranty offer above-average durability compared to competitors like the Toyo Open Country A/T III.

If you're a high-mileage driver, the 50,000-mile warranty might not be as appealing as the 60,000-mile warranty offered by some competitors.

50,000 mi warrantyTreadwear 500Traction A
Spec score68estimated
Details

The BFGoodrich All-Terrain T/A KO3 is tailored for drivers who need reliable off-road traction without sacrificing too much on-road capability.

  • Off-road traction is bolstered by the 3PMSF rating, making it suitable for challenging terrains and mild winter conditions.
  • Treadlife score of 7.5 is supported by a 50,000-mile warranty, which is competitive within the all-terrain category.

If you prioritize quiet highway rides, the average noise level may be a dealbreaker compared to quieter options.

50,000 mi warrantyTreadwear 500Traction A
Spec score68estimated
Details

The Toyo Open Country A/T III is a solid choice for those who need a tire that can handle a mix of off-road adventures and daily driving.

  • Off-road traction is supported by the 3PMSF rating, making it suitable for diverse terrains including light snow.
  • Treadlife warranty of 65,000 miles exceeds the all-terrain category average of 55,717 miles, promising longer durability.

If you prioritize on-road quietness and handling, consider other options as the Open Country A/T III focuses more on off-road durability.

50,000 mi warrantyTreadwear 600Traction A
Spec score65estimated
Details
Show 10 more all-terrain options
Mickey Thompson Baja Boss A/T

50,000 mi warranty · Treadwear 600

65
Yokohama Geolandar X-AT

45,000 mi warranty · Treadwear 500

54
Goodyear Wrangler Territory MT

Specs on detail page

Cooper Discoverer S/T Maxx

Specs on detail page

Nexen Roadian MTX

Specs on detail page

BFGoodrich HD Terrain T/A KT

Specs on detail page

Yokohama Geolandar M/T G003

Specs on detail page

Cooper Discoverer STT PRO

Specs on detail page

1 model

Best Highway All-Season Truck Tires in 305/70R18

All Highway All-Season Truck tires

The Nitto Dura Grappler is a solid choice for highway drivers who value long treadlife and dry road performance.

  • Treadlife score of 8.3 is strong, backed by a 60,000-mile warranty, which is just shy of the category average.
  • Dry grip rating of 7.5 is competitive, providing reliable performance on dry highways.

The wet grip performance is below average, which might be a dealbreaker for drivers in consistently rainy regions.

60,000 mi warrantyTreadwear 600
Spec score65estimated
Details
Fitment

Vehicles Using 305/70R18

+ 1 more vehicles use this size

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Popular Brands in 305/70R18

Size decoded

What 305/70R18 Means

305/70R18 designates a tire 305 mm (12.0") wide with a sidewall 70% as tall as it is wide — about 214 mm (8.4") — mounted on a 18-inch wheel. That works out to an overall diameter of roughly 34.8", a circumference of about 109.4", and approximately 579 revolutions per mile. Exact figures vary slightly by manufacturer and tread design.

214 mm

Sidewall height

34.8"

Overall diameter

109.4"

Circumference

579

Revs per mile

Of the 15 305/70R18 tire models we track, the most common category is all-terrain (14 models), followed by highway all-season truck (1) — a good indicator of the kind of vehicles and driving this size is designed for.

Before you buy

Frequently Asked Questions

What does 305/70R18 mean?
305/70R18 breaks down as follows: 305mm is the tire's section width (the widest point), 70 is the aspect ratio (sidewall height as a percentage of width), R means radial construction, and 18 is the wheel diameter in inches.
What vehicles use 305/70R18 tires?
305/70R18 is a common fitment for vehicles like the 2025 GMC Sierra 2500 HD, 2025 GMC Hummer EV, 2025 Chevrolet Silverado 2500, 2024 GMC Sierra 2500 HD and others. Always confirm your specific trim's fitment before purchasing.
How tall is a 305/70R18 tire?
A 305/70R18 tire has a sidewall height of about 214 mm (8.4") and an overall diameter of roughly 34.8", turning approximately 579 revolutions per mile. Actual dimensions vary slightly by manufacturer and model, so confirm against your vehicle's placard before changing sizes.

305/70R18 Research Guides

Confirm 305/70R18 fits your vehicle

Wheel size can vary by trim and option package. Enter your year, make, model, and trim to verify fitment before you order.

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