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Tire Size Guide

235/80R18 Tires

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

Our Top Pick in 235/80R18
Michelin Primacy XC
Highway All-Season TruckValue

The Michelin Primacy XC is a solid choice for truck owners who need reliable wet grip and balanced handling.

Treadlife warranty of 55,000 miles is competitive, though slightly below the category average of 61,048 miles. Wet grip score of 7 is above the category average of 6.1, offering better-than-average performance in rainy conditions. Handling score of 7.5 matches the dry grip score, indicating balanced performance on paved roads.
65Spec score (est.)
Full analysis
1 model

Best Highway All-Season Truck Tires in 235/80R18

All Highway All-Season Truck tires
Michelin Primacy XCValue

The Michelin Primacy XC is a solid choice for truck owners who need reliable wet grip and balanced handling.

  • Treadlife warranty of 55,000 miles is competitive, though slightly below the category average of 61,048 miles.
  • Wet grip score of 7 is above the category average of 6.1, offering better-than-average performance in rainy conditions.

The about average treadwear rating of 480 compared to the category average might lead to more frequent replacements.

40,000 mi warrantyTreadwear 480Traction A
Spec score65estimated
Details
1 model

Best All-Terrain Tires in 235/80R18

All All-Terrain tires
BFGoodrich All Terrain T/A KO3Value3PMSF Snow

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 warranty
Spec score58estimated
Details
Fitment

Vehicles Using 235/80R18

2025 Chevrolet
Silverado 35002025 GMC
Sierra 3500 HD2024 Chevrolet
Silverado 35002024 GMC
Sierra 3500 HD
Browse

Popular Brands in 235/80R18

Michelin · 1BFGoodrich · 1
Size decoded

What 235/80R18 Means

235/80R18 designates a tire 235 mm (9.3") wide with a sidewall 80% as tall as it is wide — about 188 mm (7.4") — mounted on a 18-inch wheel. That works out to an overall diameter of roughly 32.8", a circumference of about 103.1", and approximately 615 revolutions per mile. Exact figures vary slightly by manufacturer and tread design.

188 mm

Sidewall height

32.8"

Overall diameter

103.1"

Circumference

615

Revs per mile

Of the 2 235/80R18 tire models we track, the most common category is highway all-season truck (1 model), followed by all-terrain (1) — a good indicator of the kind of vehicles and driving this size is designed for.

Before you buy

Frequently Asked Questions

What does 235/80R18 mean?
235/80R18 breaks down as follows: 235mm is the tire's section width (the widest point), 80 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 235/80R18 tires?
235/80R18 is a common fitment for vehicles like the 2025 Chevrolet Silverado 3500, 2025 GMC Sierra 3500 HD, 2024 Chevrolet Silverado 3500, 2024 GMC Sierra 3500 HD. Always confirm your specific trim's fitment before purchasing.
How tall is a 235/80R18 tire?
A 235/80R18 tire has a sidewall height of about 188 mm (7.4") and an overall diameter of roughly 32.8", turning approximately 615 revolutions per mile. Actual dimensions vary slightly by manufacturer and model, so confirm against your vehicle's placard before changing sizes.

235/80R18 Research Guides

Buying Guide

Best Tires for Trucks

Truck-focused picks and tradeoffs for highway, all-terrain, towing, and work-truck use.

Read guide

Buying Guide

Tire Warranty Explained

Mileage warranties, exclusions, road hazard fine print, and how to compare warranty language intelligently.

Read guide

Buying Guide

When to Replace Tires

Know the real tread-depth, age, and wear-pattern signs that mean your tires are ready to be replaced.

Read guide

Confirm 235/80R18 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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