Toyo Open Country Q/T 235/55R18 Open Country Q/T
Toyo

Open Country Q/T

235/55R18
All-Season M+S
$171.65/tire $228.87
Set of 4: $686.60
Minimum order: 4 tires (sizes can be mixed) ? Selling in sets of 4 is how we keep our prices this low — and a matching set keeps your car balanced and safe.
Most drivers replace all four for even wear and handling.
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Specifications

Size235/55R18 Open Country Q/T
Width235 mm
Aspect ratio55
Rim diameterR18
Load index100
Speed ratingV
Load rangeSL
SeasonAll-Season
UTQG680 A A
Treadwear warranty65,000 miles
Tread depth12/32"
Weight31.7 lbs
Max pressure51 psi
Severe snow (3PMSF)No
Run-flatNo

About the Toyo Open Country Q/T

All-Season Passenger CUV/SUV Touring tire.

Features

* Four wide circumferential grooves* Open lateral slits* Silent Wall Technology* Multi-wave sipes* 65,000 Mile/105,000 Km Limited Treadwear Warranty* 500 Mile Trial Offer

Benefits

* Evacuates water to improve wet traction* Improves water drainage for better wet performance* Provides a quieter ride by reducing pipe resonance* Minimize irregular wear, Improves braking on wet and dry roads and improves light snow traction

Understanding the 235/55R18 size

In the size code 235/55R18, 235 is the section width in millimetres (about 9.3"). 55 is the aspect ratio — the sidewall height is 55% of the width, or roughly 129.3 mm. R18 means radial construction on a 18-inch wheel, giving an approximate overall diameter of 28.2".

The load index 100 means each tire supports up to 1,764 lbs — about 7,056 lbs across a full set of four. The speed symbol V certifies the tire to 149 mph under its rated load. Always match or exceed the load index and speed rating listed on your vehicle's door-jamb placard.

What the Toyo Open Country Q/T is built for

The Toyo Open Country Q/T is an all-season tire, balancing dry grip, wet traction and tread life across spring, summer and autumn conditions. It carries an M+S (mud and snow) marking for light winter service. Fitment category: Passenger Car, SUV/CUV, Performance, Touring.

Tread life and grip ratings

This tire carries a UTQG rating of 680 A A. The treadwear grade of 680 is a relative durability score — a grade of 200 is expected to last roughly twice as long as a grade of 100 under the same controlled test. Traction grade A measures straight-line wet stopping grip (AA is highest, then A, B and C). Temperature grade A reflects heat resistance at sustained speed (A is highest).

Price and value

At $171.65 per tire, a full set of four costs $686.60. That is about 8% above the average of the 147 tires we stock in this size, reflecting its position in the range. Backed by a 65,000-mile treadwear warranty, that works out to roughly $10.56 per 1,000 miles across the set.

Frequently asked questions

What does the tire size 235/55R18 mean?

235 is the section width in millimetres, 55 is the aspect ratio (sidewall height as a percentage of width, about 129.3 mm), and R18 indicates radial construction for a 18-inch wheel. Overall diameter is approximately 28.2 inches.

What are the load and speed ratings of the Toyo Open Country Q/T 235/55R18?

Its load index of 100 allows up to 1,764 lbs per tire. Its speed rating of V is certified to 149 mph. Check your door-jamb placard and do not fit a tire rated below the vehicle's requirement.

How much does a set of 4 Toyo Open Country Q/T 235/55R18 tires cost?

A single tire is $171.65 and a set of four is $686.60, covered by a 65,000-mile treadwear warranty.

Does the Open Country Q/T come in other sizes?

Yes — we stock 41 additional Open Country Q/T sizes besides 235/55R18. Fit only a size approved for your vehicle.

Other sizes of this model

Similar tires in 235/55R18

Toyo Celsius 235/55R18 Celsius
Toyo
Celsius
235/55R18
All-Weather 3PMSF
$150.16/tire
$600.64 set of 4