Toyo Proxes ST III 305/45R22 XL Proxes ST Iii
Toyo

Proxes ST III

305/45R22 XL
All-Season Run-flat 3PMSF M+S
$177.05/tire $236.07
Set of 4: $708.20
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

Size305/45R22 XL Proxes ST Iii
Width305 mm
Aspect ratio45
Rim diameterR22
Load index118
Speed ratingV
Load rangeXL
SeasonAll-Season
UTQG500 A A
Treadwear warranty40,000 miles
Tread depth10.1/32"
Weight45.6 lbs
Max pressure50 psi
Severe snow (3PMSF)Yes
Run-flatYes

About the Toyo Proxes ST III

All-Season High Performance Passenger Light Truck/SUV and Crossover tire.

Features

* Dynamic directional tread design* Directional shoulder blocks* Lightning grooves* Arrowhead tapers* Multi-wave sipes* 40,000 Mile/64,000 Kilometer Limited Treadwear Warranty* 500 Mile Trial Offer

Benefits

* Provides a good balance between wet traction, dry handling and performance based looks* Stabilizes tread blocks for better braking performance and a quieter ride* Enables better water evacuation resulting in better wet performance* Delivers tread block stiffness resulting in better straight-line driving stability* Maximizes irregular wear for a smooth, quiet ride and improves light snow traction

Understanding the 305/45R22 XL size

In the size code 305/45R22, 305 is the section width in millimetres (about 12"). 45 is the aspect ratio — the sidewall height is 45% of the width, or roughly 137.3 mm. R22 means radial construction on a 22-inch wheel, giving an approximate overall diameter of 32.8".

The load index 118 means each tire supports up to 2,910 lbs — about 11,640 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 Proxes ST III is built for

The Toyo Proxes ST III is an all-season tire, balancing dry grip, wet traction and tread life across spring, summer and autumn conditions. It carries the three-peak mountain snowflake (3PMSF) symbol, meaning it passed a standardised severe-snow traction test. Run-flat construction lets you keep driving a limited distance at reduced speed after a loss of pressure. It is classified for highway terrain(h/t) use.

Tread life and grip ratings

This tire carries a UTQG rating of 500 A A. The treadwear grade of 500 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 $177.05 per tire, a full set of four costs $708.20. That is about 36% below the average price of the 21 tires we stock in this size. Backed by a 40,000-mile treadwear warranty, that works out to roughly $17.71 per 1,000 miles across the set.

Frequently asked questions

What does the tire size 305/45R22 mean?

305 is the section width in millimetres, 45 is the aspect ratio (sidewall height as a percentage of width, about 137.3 mm), and R22 indicates radial construction for a 22-inch wheel. Overall diameter is approximately 32.8 inches.

What are the load and speed ratings of the Toyo Proxes ST III 305/45R22 XL?

Its load index of 118 allows up to 2,910 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 Proxes ST III 305/45R22 XL tires cost?

A single tire is $177.05 and a set of four is $708.20, covered by a 40,000-mile treadwear warranty.

Is the Toyo Proxes ST III rated for snow?

Yes. It carries the three-peak mountain snowflake (3PMSF) symbol, meaning it met a standardised severe snow traction test.

Is the Toyo Proxes ST III a run-flat tire?

Yes. Run-flat construction supports the vehicle for a limited distance at reduced speed after a loss of air pressure, so you can reach a service point without an immediate roadside change.

Does the Proxes ST III come in other sizes?

Yes — we stock 50 additional Proxes ST III sizes besides 305/45R22 XL. Fit only a size approved for your vehicle.

Other sizes of this model

Similar tires in 305/45R22

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